UPSC Prelims PYQs · CSAT (Paper II)

Reading comprehension II: central idea, author's view, purpose and passage-based facts: previous-year questions

263 real UPSC Prelims questions (2011–2026) with the official answer and a clear explanation. 71 of them came in the last five papers.

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UPSC Prelims 2016 · CSAT (Paper II)
Read the passage

As we look to 2050, when we will need to feed two billion more people, the question of which diet is best has taken on new urgency. The foods we choose to eat in the coming decades will have dramatic ramifications for the planet. Simply put, a diet that revolves around meat and dairy, a way of eating that is on the rise throughout the developing world, will take a greater toll on the world’s resources than one that revolves around unrefined grains, nuts, fruits and vegetables.

What is the critical message conveyed by the above passage ?

Answer (a) & explanation

The critical message is that more animal-based food puts a bigger burden on natural resources (a). Step 1: the passage says a diet rich in meat and dairy "will take a greater toll on the world's resources". That is option (a). Step 2: option (b) says plant diets are best for health in developing countries. But the passage judges diets by their effect on the planet, not on health. Step 3: option (c), about people changing habits regardless of health, is not the point. Option (d), that we do not know the best diet, misses the main concern.

Tip: animal food needs much more land, water and feed per calorie than plant food. This is a common theme in climate passages.

Answer as per the official UPSC answer key.

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UPSC Prelims 2016 · CSAT (Paper II)
Read the passage

Accountability, or the lack of it, in governance generally, and civil services, in particular, is a major factor underlying the deficiencies in governance and public administration. Designing an effective framework for accountability has been a key element of the reform agenda. A fundamental issue is whether civil services should be accountable to the political executive of the day or to society at large. In other words, how should internal and external accountability be reconciled ? Internal accountability is sought to be achieved by internal performance monitoring, official supervision by bodies like the Central Vigilance Commission and Comptroller and Auditor General, and judicial review of executive decisions. Articles 311 and 312 of the Indian Constitution provide job security and safeguards to the civil services, especially the All India Services. The framers of the Constitution had envisaged that provision of these safeguards would result in a civil service that is not totally subservient to the political executive but will have the strength to function in larger public interest. The need to balance internal and external accountability is thus built into the Constitution. The issue is where to draw the line. Over the years, the emphasis seems to have tilted in favour of greater internal accountability of the civil services to the political leaders of the day who in turn are expected to be externally accountable to the society at large through the election process. This system for seeking accountability to society has not worked out, and has led to several adverse consequences for governance.
Some special measures can be considered for improving accountability in civil services. Provisions of articles 311 and 312 should be reviewed and laws and regulations framed to ensure external accountability of civil services. The proposed Civil Services Bill seeks to address some of these requirements. The respective roles of professional civil services and the political executive should be defined so that professional managerial functions and management of civil services are depoliticized. For this purpose, effective statutory civil service boards should be created at the centre and in the states. Decentralization and devolution of authority to bring government and decision making closer to the people also helps to enhance accountability.

According to the passage, which of the following factor/factors led to the adverse consequences for governance/public administration ?

  • 1. Inability of civil services to strike a balance between internal and external accountabilities
  • 2. Lack of sufficient professional training to the officers of All India Services
  • 3. Lack of proper service benefits in civil services
  • 4. Lack of Constitutional provisions to define the respective roles of professional civil services vis-a-vis political executive in this context

Select the correct answer using the code given below :

Answer (c) & explanation

The answer is 1 and 4 only (c). Step 1: the passage says the tilt towards internal accountability to political leaders "has led to several adverse consequences". That is the failure to balance internal and external accountability, so statement 1 is right. Step 2: it also says the roles of civil servants and the political executive should be defined, which means they are not clearly defined now. So statement 4 is right. Step 3: training of officers (2) and service benefits (3) are never mentioned. So options (a), (b) and (d) fail.

Tip: in "according to the passage" questions, tick a statement only if you can point to a line that supports it. Sensible ideas from outside the passage do not count.

Answer as per the official UPSC answer key.

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UPSC Prelims 2016 · CSAT (Paper II)
Read the passage

Historically, the biggest challenge to world agriculture has been to achieve a balance between demand for and supply of food. At the level of individual countries, the demand-supply balance can be a critical policy issue for a closed economy, especially if it is a populous economy and its domestic agriculture is not growing sufficiently enough to ensure food supplies, on an enduring basis; it is not so much and not always, of a constraint for an open, and growing economy, which has adequate exchange surpluses to buy food abroad. For the world as a whole, supply-demand balance is always an inescapable prerequisite for warding off hunger and starvation. However, global availability of adequate supply does not necessarily mean that food would automatically move from countries of surplus to countries of deficit if the latter lack in purchasing power. The uneven distribution of hunger, starvation, under- or malnourishment, etc., at the world-level, thus owes itself to the presence of empty-pocket hungry mouths, overwhelmingly confined to the underdeveloped economies. Inasmuch as ‘a two-square meal’ is of elemental significance to basic human existence, the issue of worldwide supply of food has been gaining significance, in recent times; both because the quantum and the composition of demand has been undergoing big changes, and because, in recent years, the capabilities of individual countries to generate uninterrupted chain of food supplies have come under strain. Food production, marketing and prices, especially price-affordability by the poor in the developing world, have become global issues that need global thinking and global solutions.

According to the above passage, which of the following are the fundamental solutions for the world food security problem ?

  • 1. Setting up more agro-based industries
  • 2. Improving the price affordability by the poor
  • 3. Regulating the conditions of marketing
  • 4. Providing food subsidy to one and all

Select the correct answer using the code given below:

Answer (b) & explanation

Statements 2 and 3 are the fundamental solutions (b). Step 1: the closing line names "marketing and prices, especially price-affordability by the poor" as the key global issues. Step 2: so improving affordability for the poor (2) and regulating marketing conditions (3) are the solutions the passage points to. Step 3: setting up agro-based industries (1) and food subsidy for all (4) are not mentioned. So options (a), (c) and (d) fail.

Tip: "according to the passage" means stick to what is written. A food subsidy for "one and all" also sounds extreme; the passage stresses the poor. In India, the National Food Security Act targets about two-thirds of the population, not everyone.

Answer as per the official UPSC answer key.

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UPSC Prelims 2016 · CSAT (Paper II)
Read the passage

Accountability, or the lack of it, in governance generally, and civil services, in particular, is a major factor underlying the deficiencies in governance and public administration. Designing an effective framework for accountability has been a key element of the reform agenda. A fundamental issue is whether civil services should be accountable to the political executive of the day or to society at large. In other words, how should internal and external accountability be reconciled ? Internal accountability is sought to be achieved by internal performance monitoring, official supervision by bodies like the Central Vigilance Commission and Comptroller and Auditor General, and judicial review of executive decisions. Articles 311 and 312 of the Indian Constitution provide job security and safeguards to the civil services, especially the All India Services. The framers of the Constitution had envisaged that provision of these safeguards would result in a civil service that is not totally subservient to the political executive but will have the strength to function in larger public interest. The need to balance internal and external accountability is thus built into the Constitution. The issue is where to draw the line. Over the years, the emphasis seems to have tilted in favour of greater internal accountability of the civil services to the political leaders of the day who in turn are expected to be externally accountable to the society at large through the election process. This system for seeking accountability to society has not worked out, and has led to several adverse consequences for governance.
Some special measures can be considered for improving accountability in civil services. Provisions of articles 311 and 312 should be reviewed and laws and regulations framed to ensure external accountability of civil services. The proposed Civil Services Bill seeks to address some of these requirements. The respective roles of professional civil services and the political executive should be defined so that professional managerial functions and management of civil services are depoliticized. For this purpose, effective statutory civil service boards should be created at the centre and in the states. Decentralization and devolution of authority to bring government and decision making closer to the people also helps to enhance accountability.

With reference to the passage, the following assumptions have been made :

  • 1. Political executive is an obstacle to the accountability of the civil services to the society
  • 2. In the present framework of Indian polity, the political executive is no longer accountable to the society

Which of these assumptions is/are valid ?

Answer (a) & explanation

Only assumption 1 is valid (a). Step 1: the passage says routing accountability through political leaders "has not worked out", and calls for depoliticising the civil services. So the author treats the political executive as a block between civil servants and society. Assumption 1 holds. Step 2: the passage also says politicians are accountable to society "through the election process". So assumption 2, that they are no longer accountable, goes against the passage. Step 3: so options (b), (c) and (d) fail.

Tip: an assumption must fit what the author already believes. If the passage says the opposite of a statement, as here with elections, reject that statement at once.

Answer as per the official UPSC answer key.

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UPSC Prelims 2016 · CSAT (Paper II)
Read the passage

Historically, the biggest challenge to world agriculture has been to achieve a balance between demand for and supply of food. At the level of individual countries, the demand-supply balance can be a critical policy issue for a closed economy, especially if it is a populous economy and its domestic agriculture is not growing sufficiently enough to ensure food supplies, on an enduring basis; it is not so much and not always, of a constraint for an open, and growing economy, which has adequate exchange surpluses to buy food abroad. For the world as a whole, supply-demand balance is always an inescapable prerequisite for warding off hunger and starvation. However, global availability of adequate supply does not necessarily mean that food would automatically move from countries of surplus to countries of deficit if the latter lack in purchasing power. The uneven distribution of hunger, starvation, under- or malnourishment, etc., at the world-level, thus owes itself to the presence of empty-pocket hungry mouths, overwhelmingly confined to the underdeveloped economies. Inasmuch as ‘a two-square meal’ is of elemental significance to basic human existence, the issue of worldwide supply of food has been gaining significance, in recent times; both because the quantum and the composition of demand has been undergoing big changes, and because, in recent years, the capabilities of individual countries to generate uninterrupted chain of food supplies have come under strain. Food production, marketing and prices, especially price-affordability by the poor in the developing world, have become global issues that need global thinking and global solutions.

According to the above passage, the biggest challenge to world agriculture is :

Answer (d) & explanation

The biggest challenge is to balance the demand for and supply of food (d). Step 1: the first sentence says: "the biggest challenge to world agriculture has been to achieve a balance between demand for and supply of food". Option (d) matches it word for word. Step 2: option (a), finding land and expanding food processing, is not called the biggest challenge. Step 3: option (b), ending hunger in poor countries, is a result of the imbalance, not the challenge named. Option (c), balancing food and non-food production, is not discussed.

Tip: when the passage states the answer directly, pick the option closest to its words. Do not overthink "biggest challenge" questions.

Answer as per the official UPSC answer key.

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UPSC Prelims 2016 · CSAT (Paper II)
Read the passage

Accountability, or the lack of it, in governance generally, and civil services, in particular, is a major factor underlying the deficiencies in governance and public administration. Designing an effective framework for accountability has been a key element of the reform agenda. A fundamental issue is whether civil services should be accountable to the political executive of the day or to society at large. In other words, how should internal and external accountability be reconciled ? Internal accountability is sought to be achieved by internal performance monitoring, official supervision by bodies like the Central Vigilance Commission and Comptroller and Auditor General, and judicial review of executive decisions. Articles 311 and 312 of the Indian Constitution provide job security and safeguards to the civil services, especially the All India Services. The framers of the Constitution had envisaged that provision of these safeguards would result in a civil service that is not totally subservient to the political executive but will have the strength to function in larger public interest. The need to balance internal and external accountability is thus built into the Constitution. The issue is where to draw the line. Over the years, the emphasis seems to have tilted in favour of greater internal accountability of the civil services to the political leaders of the day who in turn are expected to be externally accountable to the society at large through the election process. This system for seeking accountability to society has not worked out, and has led to several adverse consequences for governance.
Some special measures can be considered for improving accountability in civil services. Provisions of articles 311 and 312 should be reviewed and laws and regulations framed to ensure external accountability of civil services. The proposed Civil Services Bill seeks to address some of these requirements. The respective roles of professional civil services and the political executive should be defined so that professional managerial functions and management of civil services are depoliticized. For this purpose, effective statutory civil service boards should be created at the centre and in the states. Decentralization and devolution of authority to bring government and decision making closer to the people also helps to enhance accountability.

Which one of the following is the essential message implied by this passage ?

Answer (d) & explanation

The essential message is the need for reforms in civil service accountability (d). Step 1: the passage first explains the problem, then lists special measures: reviewing Articles 311 and 312, a Civil Services Bill and independent boards. A list of fixes means the message is reform. Step 2: option (a) is too absolute. Civil servants are accountable, only the balance is off. Step 3: option (b), about educated people avoiding politics, is not discussed. Option (c) is wrong because the framers did build in a balance through Articles 311 and 312.

Tip: the "essential message" usually sits where the author moves from the problem to the solution. Watch for words like "needs" or "measures".

Answer as per the official UPSC answer key.

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UPSC Prelims 2016 · CSAT (Paper II)
Read the passage

Historically, the biggest challenge to world agriculture has been to achieve a balance between demand for and supply of food. At the level of individual countries, the demand-supply balance can be a critical policy issue for a closed economy, especially if it is a populous economy and its domestic agriculture is not growing sufficiently enough to ensure food supplies, on an enduring basis; it is not so much and not always, of a constraint for an open, and growing economy, which has adequate exchange surpluses to buy food abroad. For the world as a whole, supply-demand balance is always an inescapable prerequisite for warding off hunger and starvation. However, global availability of adequate supply does not necessarily mean that food would automatically move from countries of surplus to countries of deficit if the latter lack in purchasing power. The uneven distribution of hunger, starvation, under- or malnourishment, etc., at the world-level, thus owes itself to the presence of empty-pocket hungry mouths, overwhelmingly confined to the underdeveloped economies. Inasmuch as ‘a two-square meal’ is of elemental significance to basic human existence, the issue of worldwide supply of food has been gaining significance, in recent times; both because the quantum and the composition of demand has been undergoing big changes, and because, in recent years, the capabilities of individual countries to generate uninterrupted chain of food supplies have come under strain. Food production, marketing and prices, especially price-affordability by the poor in the developing world, have become global issues that need global thinking and global solutions.

According to the above passage, which of the following helps/help in reducing hunger and starvation in the developing economies ?

  • 1. Balancing demand and supply of food
  • 2. Increasing imports of food
  • 3. Increasing purchasing power of the poor
  • 4. Changing the food consumption patterns and practices

Select the correct answer using the code given below :

Answer (c) & explanation

Statements 1 and 3 help reduce hunger (c). Step 1: the passage calls the balance of food demand and supply an "inescapable prerequisite". So statement 1 helps. Step 2: it says hunger comes from "empty-pocket hungry mouths". People are hungry because they cannot buy food. So raising the poor's purchasing power (3) helps. Step 3: increasing imports (2) needs money, so imports alone do not reach the poor. Changing food habits (4) is not suggested. So options (a), (b) and (d) fail.

Tip: this echoes Amartya Sen's idea of entitlement. Famines often happen not from a lack of food, but because the poor lack the income to buy it.

Answer as per the official UPSC answer key.

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UPSC Prelims 2016 · CSAT (Paper II)
Read the passage

Accountability, or the lack of it, in governance generally, and civil services, in particular, is a major factor underlying the deficiencies in governance and public administration. Designing an effective framework for accountability has been a key element of the reform agenda. A fundamental issue is whether civil services should be accountable to the political executive of the day or to society at large. In other words, how should internal and external accountability be reconciled ? Internal accountability is sought to be achieved by internal performance monitoring, official supervision by bodies like the Central Vigilance Commission and Comptroller and Auditor General, and judicial review of executive decisions. Articles 311 and 312 of the Indian Constitution provide job security and safeguards to the civil services, especially the All India Services. The framers of the Constitution had envisaged that provision of these safeguards would result in a civil service that is not totally subservient to the political executive but will have the strength to function in larger public interest. The need to balance internal and external accountability is thus built into the Constitution. The issue is where to draw the line. Over the years, the emphasis seems to have tilted in favour of greater internal accountability of the civil services to the political leaders of the day who in turn are expected to be externally accountable to the society at large through the election process. This system for seeking accountability to society has not worked out, and has led to several adverse consequences for governance.
Some special measures can be considered for improving accountability in civil services. Provisions of articles 311 and 312 should be reviewed and laws and regulations framed to ensure external accountability of civil services. The proposed Civil Services Bill seeks to address some of these requirements. The respective roles of professional civil services and the political executive should be defined so that professional managerial functions and management of civil services are depoliticized. For this purpose, effective statutory civil service boards should be created at the centre and in the states. Decentralization and devolution of authority to bring government and decision making closer to the people also helps to enhance accountability.

According to the passage, which one of the following is not a means of enhancing internal accountability of civil services ?

Answer (d) & explanation

People's participation is not a means of internal accountability (d). Step 1: the passage lists the internal means: internal performance monitoring, supervision by bodies like the CVC and CAG, judicial review of executive decisions, and the job safeguards in Articles 311 and 312. Step 2: so options (a), (b) and (c) all appear in the passage as internal means. Step 3: involving people in decisions brings government "closer to the people". That is accountability to society, which is external accountability. So (d) is the odd one out.

Tip: for a "which is NOT" question, tick off every option the passage supports. The one left over is the answer. Read the question word "not" twice.

Answer as per the official UPSC answer key.

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UPSC Prelims 2016 · CSAT (Paper II)
Read the passage

Historically, the biggest challenge to world agriculture has been to achieve a balance between demand for and supply of food. At the level of individual countries, the demand-supply balance can be a critical policy issue for a closed economy, especially if it is a populous economy and its domestic agriculture is not growing sufficiently enough to ensure food supplies, on an enduring basis; it is not so much and not always, of a constraint for an open, and growing economy, which has adequate exchange surpluses to buy food abroad. For the world as a whole, supply-demand balance is always an inescapable prerequisite for warding off hunger and starvation. However, global availability of adequate supply does not necessarily mean that food would automatically move from countries of surplus to countries of deficit if the latter lack in purchasing power. The uneven distribution of hunger, starvation, under- or malnourishment, etc., at the world-level, thus owes itself to the presence of empty-pocket hungry mouths, overwhelmingly confined to the underdeveloped economies. Inasmuch as ‘a two-square meal’ is of elemental significance to basic human existence, the issue of worldwide supply of food has been gaining significance, in recent times; both because the quantum and the composition of demand has been undergoing big changes, and because, in recent years, the capabilities of individual countries to generate uninterrupted chain of food supplies have come under strain. Food production, marketing and prices, especially price-affordability by the poor in the developing world, have become global issues that need global thinking and global solutions.

The issue of worldwide supply of food has gained importance mainly because of :

  • 1. overgrowth of the population worldwide
  • 2. sharp decline in the area of food production
  • 3. limitation in the capabilities for sustained supply of food

Select the correct answer using the code given below :

Answer (b) & explanation

Only statement 3 is the reason (b). Step 1: the passage says world food supply matters because "the capabilities of individual countries to generate uninterrupted chain of food supplies have come under strain". That is statement 3, the limit on steady supply. Step 2: population overgrowth (1) is not stated as the reason. Step 3: a sharp fall in food-growing area (2) is also not stated. So options (a), (c) and (d) fail.

Tip: avoid choosing an option just because it is true in real life. Population growth does raise food demand, but the question asks what the passage gives as the reason. Stay inside the passage.

Answer as per the official UPSC answer key.

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UPSC Prelims 2016 · CSAT (Paper II)
Read the passage

Biomass as fuel for power, heat, and transport has the highest mitigation potential of all renewable sources. It comes from agriculture and forest residues as well as from energy crops. The biggest challenge in using biomass residues is a long-term reliable supply delivered to the power plant at reasonable costs; the key problems are logistical constraints and the costs of fuel collection. Energy crops, if not managed properly, compete with food production and may have undesirable impacts on food prices. Biomass production is also sensitive to the physical impacts of a changing climate.
Projections of the future role of biomass are probably overestimated, given the limits to the sustainable biomass supply, unless breakthrough technologies substantially increase productivity. Climate-energy models project that biomass use could increase nearly four-fold to around 150 — 200 exajoules, almost a quarter of world primary energy in 2050. However the maximum sustainable technical potential of biomass resources (both residues and energy crops) without disruption of food and forest resources ranges from 80 — 170 exajoules a year by 2050, and only part of this is realistically and economically feasible. In addition, some climate models rely on biomass-based carbon capture and storage, an unproven technology, to achieve negative emissions and to buy some time during the first half of the century.
Some liquid biofuels such as corn-based ethanol, mainly for transport, may aggravate rather than ameliorate carbon emissions on a life-cycle basis. Second generation biofuels, based on ligno-cellulosic feedstocks — such as straw, bagasse, grass and wood — hold the promise of sustainable production that is high-yielding and emit low levels of greenhouse gases, but these are still in the R & D stage.

What is/are the present constraint/constraints in using biomass as fuel for power generation ?

  • 1. Lack of sustainable supply of biomass
  • 2. Biomass production competes with food production
  • 3. Bio-energy may not always be low carbon on a life-cycle basis

Select the correct answer using the code given below :

Answer (d) & explanation

All three constraints are right (d). Step 1: the passage mentions limits to "sustainable biomass supply". So statement 1, lack of a steady supply, is a constraint. Step 2: it says energy crops "compete with food production". So statement 2 is a constraint too. Step 3: it adds that biofuels "may aggravate" emissions "on a life-cycle basis". So bio-energy is not always low carbon, and statement 3 is right as well. Options (a), (b) and (c) each leave out at least one of the stated limits.

Tip: when every statement matches a line in the passage, pick "all of the above". Do not leave one out just because the full option seems too easy.

Answer as per the official UPSC answer key.

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UPSC Prelims 2016 · CSAT (Paper II)
Read the passage

Biomass as fuel for power, heat, and transport has the highest mitigation potential of all renewable sources. It comes from agriculture and forest residues as well as from energy crops. The biggest challenge in using biomass residues is a long-term reliable supply delivered to the power plant at reasonable costs; the key problems are logistical constraints and the costs of fuel collection. Energy crops, if not managed properly, compete with food production and may have undesirable impacts on food prices. Biomass production is also sensitive to the physical impacts of a changing climate.
Projections of the future role of biomass are probably overestimated, given the limits to the sustainable biomass supply, unless breakthrough technologies substantially increase productivity. Climate-energy models project that biomass use could increase nearly four-fold to around 150 — 200 exajoules, almost a quarter of world primary energy in 2050. However the maximum sustainable technical potential of biomass resources (both residues and energy crops) without disruption of food and forest resources ranges from 80 — 170 exajoules a year by 2050, and only part of this is realistically and economically feasible. In addition, some climate models rely on biomass-based carbon capture and storage, an unproven technology, to achieve negative emissions and to buy some time during the first half of the century.
Some liquid biofuels such as corn-based ethanol, mainly for transport, may aggravate rather than ameliorate carbon emissions on a life-cycle basis. Second generation biofuels, based on ligno-cellulosic feedstocks — such as straw, bagasse, grass and wood — hold the promise of sustainable production that is high-yielding and emit low levels of greenhouse gases, but these are still in the R & D stage.

Which of the following can lead to food security problem ?

  • 1. Using agricultural and forest residues as feedstock for power generation
  • 2. Using biomass for carbon capture and storage
  • 3. Promoting the cultivation of energy crops

Select the correct answer using the code given below :

Answer (b) & explanation

Only promoting energy crops threatens food security (b). Step 1: the passage says energy crops "compete with food production and may have undesirable impacts on food prices". So statement 3 is a food security risk. Step 2: agricultural and forest residues (statement 1) are left over after the harvest. Using them takes no food away. Step 3: carbon capture and storage with biomass (statement 2) is described as an unproven technology. It is a climate issue, not a food issue. So options (a), (c) and (d) fail.

Tip: link each statement to the exact problem the passage pins on it. Residues and waste are usually shown as the "safe" choice in biomass passages.

Answer as per the official UPSC answer key.

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UPSC Prelims 2016 · CSAT (Paper II)
Read the passage

Biomass as fuel for power, heat, and transport has the highest mitigation potential of all renewable sources. It comes from agriculture and forest residues as well as from energy crops. The biggest challenge in using biomass residues is a long-term reliable supply delivered to the power plant at reasonable costs; the key problems are logistical constraints and the costs of fuel collection. Energy crops, if not managed properly, compete with food production and may have undesirable impacts on food prices. Biomass production is also sensitive to the physical impacts of a changing climate.
Projections of the future role of biomass are probably overestimated, given the limits to the sustainable biomass supply, unless breakthrough technologies substantially increase productivity. Climate-energy models project that biomass use could increase nearly four-fold to around 150 — 200 exajoules, almost a quarter of world primary energy in 2050. However the maximum sustainable technical potential of biomass resources (both residues and energy crops) without disruption of food and forest resources ranges from 80 — 170 exajoules a year by 2050, and only part of this is realistically and economically feasible. In addition, some climate models rely on biomass-based carbon capture and storage, an unproven technology, to achieve negative emissions and to buy some time during the first half of the century.
Some liquid biofuels such as corn-based ethanol, mainly for transport, may aggravate rather than ameliorate carbon emissions on a life-cycle basis. Second generation biofuels, based on ligno-cellulosic feedstocks — such as straw, bagasse, grass and wood — hold the promise of sustainable production that is high-yielding and emit low levels of greenhouse gases, but these are still in the R & D stage.

In the context of using biomass, which of the following is/are the characteristic/characteristics of the sustainable production of biofuel ?

  • 1. Biomass as a fuel for power generation could meet all the primary energy requirements of the world by 2050
  • 2. Biomass as a fuel for power generation does not necessarily disrupt food and forest resources
  • 3. Biomass as a fuel for power generation could help in achieving negative emissions, given certain nascent technologies

Select the correct answer using the code given below :

Answer (c) & explanation

Statements 2 and 3 are right (c). Step 1: the passage says 80 to 170 exajoules a year could come from biomass "without disruption of food and forest resources". So statement 2 holds. Step 2: biomass with carbon capture can give "negative emissions", using nascent technologies. So statement 3 holds. Step 3: statement 1 says biomass could meet all the world's primary energy needs by 2050. The passage gives it about a quarter. So statement 1 is wrong, and options (a), (b) and (d) fail.

Tip: numbers are a common trap. When a statement says "all" and the passage gives a fraction, reject it.

Answer as per the official UPSC answer key.

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UPSC Prelims 2016 · CSAT (Paper II)
Read the passage

Biomass as fuel for power, heat, and transport has the highest mitigation potential of all renewable sources. It comes from agriculture and forest residues as well as from energy crops. The biggest challenge in using biomass residues is a long-term reliable supply delivered to the power plant at reasonable costs; the key problems are logistical constraints and the costs of fuel collection. Energy crops, if not managed properly, compete with food production and may have undesirable impacts on food prices. Biomass production is also sensitive to the physical impacts of a changing climate.
Projections of the future role of biomass are probably overestimated, given the limits to the sustainable biomass supply, unless breakthrough technologies substantially increase productivity. Climate-energy models project that biomass use could increase nearly four-fold to around 150 — 200 exajoules, almost a quarter of world primary energy in 2050. However the maximum sustainable technical potential of biomass resources (both residues and energy crops) without disruption of food and forest resources ranges from 80 — 170 exajoules a year by 2050, and only part of this is realistically and economically feasible. In addition, some climate models rely on biomass-based carbon capture and storage, an unproven technology, to achieve negative emissions and to buy some time during the first half of the century.
Some liquid biofuels such as corn-based ethanol, mainly for transport, may aggravate rather than ameliorate carbon emissions on a life-cycle basis. Second generation biofuels, based on ligno-cellulosic feedstocks — such as straw, bagasse, grass and wood — hold the promise of sustainable production that is high-yielding and emit low levels of greenhouse gases, but these are still in the R & D stage.

With reference to the passage, following assumptions have been made :

  • 1. Some climate-energy models suggest that the use of biomass as a fuel for power generation helps in mitigating greenhouse gas emissions
  • 2. It is not possible to use biomass as a fuel for power generation without disrupting food and forest resources

Which of these assumptions is/are valid ?

Answer (a) & explanation

Only assumption 1 is valid (a). Step 1: the passage says climate-energy models rely on biomass for "negative emissions", and that it has "the highest mitigation potential". So some models do see biomass as helping to cut greenhouse gases. Assumption 1 holds. Step 2: assumption 2 says biomass power is impossible without disrupting food and forest. But the passage says a large potential exists "without disruption of food and forest resources". So 2 contradicts the passage. Step 3: so options (b), (c) and (d) fail.

Tip: when an assumption directly clashes with a quoted line, it is never valid. Look for the line that the statement contradicts.

Answer as per the official UPSC answer key.

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UPSC Prelims 2016 · CSAT (Paper II)
Read the passage

Safe and sustainable sanitation in slums has immeasurable benefits to women and girls in terms of their health, safety, privacy and dignity. However, women do not feature in most of the schemes and policies on urban sanitation. The fact that even now the manual scavenging exists, only goes to show that not enough has been done to promote pour-flush toilets and discontinue the use of dry latrines. A more sustained and rigorous campaign needs to be launched towards the right to sanitation on a very large scale. This should primarily focus on the abolition of manual scavenging.

With reference to the above passage, consider the following statements :

  • 1. Urban sanitation problems can be fully solved by the abolition of manual scavenging only
  • 2. There is a need to promote greater awareness on safe sanitation practices in urban areas

Which of the statements given above is/are correct?

Answer (b) & explanation

Only statement 2 is correct (b). Step 1: the passage calls for a "sustained and rigorous campaign" on sanitation. So more awareness about safe sanitation is needed, and statement 2 holds. Step 2: statement 1 says sanitation problems can be "fully solved" by abolishing manual scavenging "only". The passage makes abolition the main focus, but never says it alone fixes everything. Step 3: so statement 1 goes too far, and options (a), (c) and (d) fail.

Tip: strong words like "fully" and "only" turn a reasonable idea into a false statement. Manual scavenging is banned by a 2013 Act, but sanitation needs much more than one ban.

Answer as per the official UPSC answer key.

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UPSC Prelims 2016 · CSAT (Paper II)
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The nature of the legal imperatives in any given state corresponds to the effective demands that state encounters, and that these, in their turn, depend, in a general way, upon the manner in which economic power is distributed in the society which the state controls.

The statement refers to :

Answer (b) & explanation

The statement shows the link between politics and economics (b). Step 1: it says laws follow the demands made on the state, and these depend "in a general way" on how economic power is spread. Step 2: so economics shapes politics, but only in a general way. That is a two-way relationship, not full control. Step 3: options (c) and (d) speak of one dominating the other, which "in a general way" does not support. Option (a), opposition between the two, is nowhere suggested.

Tip: soft words like "in a general way" or "to some extent" signal a link, not dominance. Choose the milder option when the author hedges.

Answer as per the official UPSC answer key.

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UPSC Prelims 2015 · CSAT (Paper II)
Read the passage

Climate change is a complex policy issue with major implications in terms of finance. All actions to address climate change ultimately involve costs. Funding is vital for countries like India to design and implement adaptation and mitigation plans and projects. Lack of funding is a large impediment to implementing adaptation plans. The scale and magnitude of the financial support required by developing countries to enhance their domestic mitigation and adaptation actions are a matter of intense debate in the multilateral negotiations under the United Nations Framework Convention on Climate Change (UNFCCC). The Convention squarely puts the responsibility for provision of financial support on the developed countries, taking into account their contribution to the stock of greenhouse gases (GHGs) in the atmosphere. Given the magnitude of the task and the funds required, domestic finances are likely to fall short of the current and projected needs of the developing countries. Global funding through the multilateral mechanism of the Convention will enhance their domestic capacity to finance the mitigation efforts.

Which one of the following is essentially discussed in the passage ?

Answer (a) & explanation

The passage discusses the conflict over support for mitigation (a). Step 1: find the centre of the passage. It explains that climate action costs money, that funding is "a matter of intense debate" between countries, and that the Convention puts the duty on developed countries. So the core topic is the disagreement between developed and developing countries over financial support. Step 2: test the others. Option (b) is wrong: the causes of climate change are not discussed. Option (c) is wrong: political will is not mentioned. Option (d) is wrong: governance problems are not discussed.

Tip: "essentially discussed" means the main topic. Check which option runs through most sentences of the passage.

Answer as per the official UPSC answer key.

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UPSC Prelims 2015 · CSAT (Paper II)
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Individuals, groups and leaders who promote human development operate under strong institutional, structural and political constraints that affect policy options. But experience suggests broad principles for shaping an appropriate agenda for human development. One important finding from several decades of human development experience is that focusing exclusively on economic growth is problematic. While we have good knowledge about how to advance health and education, the causes of growth are much less certain and growth is often elusive. Further, an unbalanced emphasis on growth is often associated with negative environmental consequences and adverse distributional effects. The experience of China, with its impressive growth record, reflects these broader concerns and underlines the importance of balanced approaches that emphasize investments in the non-income aspects of human development.

With reference to the above passage, consider the following statements :

  • 1. In developing countries, a strong institutional framework is the only requirement for human development and policy options.
  • 2. Human development and economic growth are not always positively inter-related.
  • 3. Focusing only on human development should be the goal of economic growth.

Which of the above statements is/are correct ?

Answer (c) & explanation

Only statement 2 is correct (c). Step 1: test statement 2. The passage says focusing only on growth brings "adverse distributional effects" and environmental harm. So growth does not always improve human development; the two are not always positively linked. 2 holds. Step 2: test statement 1. It says a strong institutional framework is the "only" requirement. The passage never says this; it mentions constraints but not a single requirement. 1 fails. Step 3: test statement 3. It says growth should focus "only" on human development. The passage calls for "balanced approaches", not an exclusive focus. 3 fails. Options (a), (b) and (d) fail.

Tip: "only" in a statement usually clashes with a passage that asks for balance.

Answer as per the official UPSC answer key.

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UPSC Prelims 2015 · CSAT (Paper II)
Read the passage

Individuals, groups and leaders who promote human development operate under strong institutional, structural and political constraints that affect policy options. But experience suggests broad principles for shaping an appropriate agenda for human development. One important finding from several decades of human development experience is that focusing exclusively on economic growth is problematic. While we have good knowledge about how to advance health and education, the causes of growth are much less certain and growth is often elusive. Further, an unbalanced emphasis on growth is often associated with negative environmental consequences and adverse distributional effects. The experience of China, with its impressive growth record, reflects these broader concerns and underlines the importance of balanced approaches that emphasize investments in the non-income aspects of human development.

With reference to the above passage, the following assumptions have been made :

  • 1. Higher economic growth is essential to ensure reduction in economic disparity.
  • 2. Environmental degradation is sometimes a consequence of economic growth.

Which of the above is/are valid assumption/assumptions ?

Answer (b) & explanation

Only assumption 2 is valid (b). Step 1: test assumption 2. The passage says "an unbalanced emphasis on growth is often associated with negative environmental consequences". So environmental harm is sometimes a result of growth. 2 holds. Step 2: test assumption 1. It says higher growth is essential to reduce disparity. The passage says growth often brings "adverse distributional effects", meaning it can widen disparity. So 1 contradicts the passage. Options (a), (c) and (d) fail.

Tip: the word "sometimes" in assumption 2 matches "often" in the passage. Mild words that match the passage's tone are usually safe. A strong claim like "essential" needs strong support.

Answer as per the official UPSC answer key.

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UPSC Prelims 2015 · CSAT (Paper II)
Read the passage

We generally talk about democracy but when it comes to any particular thing, we prefer a belonging to our caste or community or religion. So long as we have this kind of temptation, our democracy will remain a phoney kind of democracy. We must be in a position to respect a man as a man and to extend opportunities for development to those who deserve them and not to those who happen to belong to our community or race. This fact of favouritism has been responsible for much discontent and ill-will in our country.

Which one of the following statements best sums up the above passage ?

Answer (b) & explanation

True democracy needs equal opportunities for all (b). Step 1: find the main point. The author says we prefer people of our own caste, community or religion. This makes our democracy "phoney". We must "respect a man as a man" and give opportunities to those who deserve them. That is equal opportunity. Step 2: test the others. Option (a) is wrong: diversity is the background, not the message. Option (c) is wrong: "none of us" is too strong. Option (d) is wrong: "never" is too pessimistic; the author suggests a fix.

Tip: when a passage criticises a problem and then says "we must...", the "must" line is usually the summary.

Answer as per the official UPSC answer key.

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UPSC Prelims 2015 · CSAT (Paper II)
Read the passage

The existence/establishment of formal financial institutions that offer safe, reliable, and alternative financial instruments is fundamental in mobilising savings. To save, individuals need access to safe and reliable financial institutions, such as banks, and to appropriate financial instruments and reasonable financial incentives. Such access is not always available to all people in developing countries like India and more so, in rural areas. Savings help poor households manage volatility in cash flow, smoothen consumption, and build working capital. Poor households without access to a formal savings mechanism encourage immediate spending temptations.

With reference to the above passage, consider the following statements :

  • 1. Indian financial institutions do not offer any financial instruments to rural households to mobilise their savings.
  • 2. Poor households tend to spend their earnings/savings due to lack of access to appropriate financial instruments.

Which of the statements given above is/are correct ?

Answer (b) & explanation

Only statement 2 is correct (b). Step 1: test statement 2. The passage says poor households without access to a formal savings mechanism face "immediate spending temptations". So they spend their earnings because they lack suitable instruments. 2 holds. Step 2: test statement 1. The passage says access is "not always available to all people", especially in rural areas. That is different from saying institutions offer no instruments at all. So 1 goes too far. Options (a), (c) and (d) fail.

Tip: "not always available" means some people lack access, not everyone. UPSC often turns a partial problem into a total one to make a wrong statement.

Answer as per the official UPSC answer key.

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