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Tamil Nadu HSE First Year Economics study materials
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Tamil Nadu HSE First Year Economics practice questions

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Question 1Nature and Scope of Economics

Which definition of Economics is associated with Lionel Robbins in his 1932 work on the nature and significance of economic science?

  1. Economics is the study of how people earn and spend their daily bread.
  2. Economics is the science that treats phenomena from the standpoint of price.
  3. Economics is the science of wealth and the causes of the wealth of nations.
  4. Economics is the science which studies human behaviour as a relationship between ends and scarce means which have alternative uses. Correct answer.

Explanation

Robbins defined Economics by scarcity and choice: unlimited wants, limited means, and alternative uses. His definition shifted the subject from wealth to human behaviour, and it introduced the idea of opportunity cost. It is therefore called the scarcity definition.

Question 2Nature and Scope of Economics

Adam Smith's wealth definition of Economics was criticised mainly because it gave excessive importance to which aspect of human life?

  1. Material wealth and the means of acquiring it Correct answer.
  2. Political liberty
  3. Moral and ethical improvement
  4. Religious practice

Explanation

The wealth definition treated humans as agents for producing and accumulating wealth. Critics such as Carlyle called Economics a dismal science for this narrowness. Later welfare and scarcity definitions widened the subject to human well-being and choice.

Question 3Nature and Scope of Economics

In Robbins's definition, the central economic problem arises because means are scarce relative to ends. Which concept follows directly from this scarcity?

  1. The need to choose among alternative uses of resources Correct answer.
  2. The elimination of all wants
  3. The certainty of full employment
  4. The equality of incomes

Explanation

When means are limited and have alternative uses, a choice must be made about which want to satisfy first. Every choice involves giving up the next best alternative, which is opportunity cost. Scarcity and choice are thus inseparable in Robbins's framework.

Question 4Nature and Scope of Economics

A farmer who uses his only plot of land to grow paddy instead of sugarcane forgoes the income from sugarcane. This forgone income best illustrates which economic idea?

  1. National income
  2. Elasticity of demand
  3. Marginal utility
  4. Opportunity cost Correct answer.

Explanation

Opportunity cost is the value of the next best alternative sacrificed when a choice is made. Because the land has alternative uses, using it for paddy means giving up the sugarcane option. This is a direct application of the scarcity-and-choice logic in Robbins's definition.

Question 5Nature and Scope of Economics

Alfred Marshall's welfare definition described Economics as the study of mankind in the ordinary business of life. Which feature distinguishes it from the earlier wealth definition?

  1. It rejected the idea of scarcity altogether.
  2. It treated Economics as a purely physical science.
  3. It confined the subject to government finance.
  4. It shifted focus from wealth itself to human welfare and material well-being. Correct answer.

Explanation

Marshall placed human welfare at the centre, examining how people earn and spend income. Wealth remained important but only as a means to well-being. This made Economics a social science concerned with material welfare.

Question 6Nature and Scope of Economics

Robbins's definition is often called more scientific than Marshall's because it is neutral about ends. What does this mean?

  1. It studies the relation between ends and scarce means without judging whether the ends are worthy. Correct answer.
  2. It concerns itself only with wealth accumulation.
  3. It ignores the problem of choice completely.
  4. It prescribes which wants people should satisfy.

Explanation

Robbins made Economics a positive science of choice, applicable to any ends, worthy or not. Marshall's welfare definition required value judgements about what promotes well-being. Neutrality about ends is therefore the scientific claim Robbins's supporters make.

Question 7Nature and Scope of Economics

A statement such as 'the Tamil Nadu government should raise the subsidy on rice' belongs to which category in Economics?

  1. A tautology
  2. A definitional statement
  3. A normative statement Correct answer.
  4. A positive statement

Explanation

Normative statements express value judgements about what ought to be done. The word 'should' signals a policy recommendation, not a testable fact. Positive statements, by contrast, describe what is and can be verified.

Question 8Nature and Scope of Economics

Which pair correctly matches an approach in Economics with its characteristic method?

  1. Inductive method with reasoning from general principles to particular cases
  2. Inductive method with reasoning from definitions to conclusions only
  3. Deductive method with reasoning from general principles to particular cases Correct answer.
  4. Deductive method with reasoning from particular observations to general laws

Explanation

Deductive reasoning moves from general premises to specific conclusions, as in deriving predictions from assumptions. Inductive reasoning moves from particular observations to general laws. The two methods are complementary in economic analysis.

Question 9Nature and Scope of Economics

Economists build models with simplifying assumptions such as 'other things being equal'. What is the main purpose of this assumption?

  1. To isolate the effect of one variable by holding other influences constant Correct answer.
  2. To avoid using any data
  3. To make the model unrealistic in every respect
  4. To guarantee that predictions are always correct

Explanation

The ceteris paribus assumption allows an economist to study one cause and effect at a time. By holding other factors constant, the relationship between the chosen variables becomes clear. This is a methodological device, not a claim that the real world is static.

Question 10Nature and Scope of Economics

Which of the following is best described as a microeconomic question?

  1. How is the general price level determined in the economy?
  2. What causes fluctuations in aggregate employment?
  3. How does the total money supply affect national output?
  4. How does a rise in the price of rice affect the quantity demanded by households in a district? Correct answer.

Explanation

Microeconomics studies individual units such as households, firms, and single markets. The effect of rice price on household demand concerns one market and individual decision-makers. The other options involve economy-wide aggregates, which belong to macroeconomics.

Question 11Nature and Scope of Economics

Which subject matter belongs to macroeconomics rather than microeconomics?

  1. Cost structure of an individual firm
  2. Price of a single commodity in a local market
  3. Consumer's choice between two goods
  4. Determination of national income and general employment Correct answer.

Explanation

Macroeconomics deals with aggregates such as national income, total employment, and the general price level. Microeconomics deals with individual units, single markets, and individual choices. National income determination is therefore a macroeconomic topic.

Question 12Nature and Scope of Economics

Economics is called a social science mainly because it studies which of the following?

  1. The classification of living organisms
  2. Human behaviour in relation to production, distribution, and consumption Correct answer.
  3. The motion of physical bodies
  4. Chemical reactions in laboratories

Explanation

Economics examines how people and institutions behave in using scarce resources. Because its subject is human society rather than physical or biological phenomena, it is classified as a social science. It uses observation and reasoning about human conduct.

Question 13Nature and Scope of Economics

Which statement best captures the relationship between Economics and statistics?

  1. Economics is a branch of statistics.
  2. Statistics supplies tools for collecting and analysing economic data, while Economics gives meaning to that data. Correct answer.
  3. Statistics and Economics are unrelated subjects.
  4. Statistics can replace economic theory entirely.

Explanation

Economics uses statistical methods for measurement and testing, as in estimating demand or national income. Statistics alone cannot explain causes; economic theory interprets the numbers. The two disciplines are complementary, not substitutes.

Question 14Nature and Scope of Economics

The central problem of scarcity in Economics arises because which two conditions hold together?

  1. Both wants and resources are limited in equal measure
  2. Both wants and resources are unlimited
  3. Human wants are limited while resources are unlimited
  4. Human wants are unlimited while resources are limited and have alternative uses Correct answer.

Explanation

Scarcity exists when unlimited wants confront limited resources that can be put to alternative uses. This combination forces choice and gives rise to the economic problem. If resources were unlimited, no economic problem would arise.

Question 15Nature and Scope of Economics

A student must choose between studying for an examination and working a part-time job on the same evening. Which element of economic reasoning does this situation illustrate most directly?

  1. Perfect competition in a market
  2. Inflation in the general price level
  3. Balance of payments adjustment
  4. Choice under scarcity with an associated opportunity cost Correct answer.

Explanation

Time is a scarce resource with alternative uses, so the student must choose. The value of the option forgone, here the earnings or the study benefit, is the opportunity cost. This is the core logic of the scarcity definition applied to daily life.

Question 16Nature and Scope of Economics

'Economics is neutral between ends.' Which criticism is most often raised against this claim about Robbins's definition?

  1. It makes Economics too concerned with moral judgements.
  2. It denies the existence of scarcity.
  3. By ignoring ends, the definition reduces Economics to a mere logic of choice and neglects welfare and growth. Correct answer.
  4. It restricts the subject to government budgeting.

Explanation

Critics such as welfare economists argued that a purely neutral definition empties Economics of its concern with human well-being. They felt the subject should address growth, distribution, and welfare, not just formal choice. The neutrality claim thus became a major point of debate.

Question 17Nature and Scope of Economics

A government announces that the literacy rate in the state rose from 80 per cent to 84 per cent. Classify this statement within economic reasoning.

  1. A normative statement, since it recommends a policy
  2. A definitional claim about Economics
  3. A value judgement about what literacy ought to be
  4. A positive statement, since it reports a verifiable fact Correct answer.

Explanation

Positive statements describe facts that can be checked against evidence. The reported rise in literacy is a measurable observation, so it is positive. It makes no recommendation about what the rate should be.

Question 18Nature and Scope of Economics

Which of the following best explains why economic laws are often described as less exact than the laws of physics?

  1. They are based on no observations at all.
  2. They apply only to plants and animals.
  3. They are always mathematically false.
  4. They deal with human behaviour, which varies and cannot be controlled in a laboratory. Correct answer.

Explanation

Economic laws concern human beings whose choices differ across time and place. Unlike physical experiments, economists cannot hold all conditions constant in a controlled setting. Predictions are therefore tendencies rather than exact certainties.

Question 19Nature and Scope of Economics

An economist studies how a single firm decides its output level, and another studies how the nation's total output is determined. These two enquiries belong respectively to which branches?

  1. Both to macroeconomics
  2. Macroeconomics and microeconomics
  3. Both to microeconomics
  4. Microeconomics and macroeconomics Correct answer.

Explanation

The individual firm's output decision is a microeconomic question about a single unit. National output is an aggregate variable studied in macroeconomics. The distinction rests on whether the unit of analysis is individual or economy-wide.

Question 20Nature and Scope of Economics

Which statement about the scope of Economics is most consistent with modern usage in Tamil Nadu higher secondary study?

  1. Economics deals only with government budgets and taxation.
  2. Economics covers production, consumption, distribution, and exchange, and also uses both positive and normative analysis. Correct answer.
  3. Economics is limited to the study of wealth accumulation alone.
  4. Economics is confined to describing individual household choices.

Explanation

Modern Economics is broad, covering production, consumption, distribution, and exchange. It includes positive analysis of what is and normative analysis of what ought to be. This breadth reflects the evolution from wealth to welfare to scarcity definitions.

Question 21Consumer Behaviour and Demand

In economics, the term 'utility' refers to which of the following?

  1. The satisfaction a consumer derives from consuming a good Correct answer.
  2. The money value of a good fixed by the government
  3. The physical quantity of a good available in the market
  4. The total cost incurred in producing a good

Explanation

Utility is a subjective concept that measures the want-satisfying power of a commodity, that is, the satisfaction a consumer obtains from it. It is not a price, a cost, or a physical stock, because the same good can yield different satisfaction to different consumers.

Question 22Consumer Behaviour and Demand

A consumer eats four idlis one after another. The satisfaction from the fourth idli is called:

  1. Marginal utility Correct answer.
  2. Average utility
  3. Total utility
  4. Zero utility

Explanation

Marginal utility is the addition to total utility caused by consuming one more unit of a commodity. The satisfaction from the fourth idli is the extra satisfaction gained over three idlis, so it is marginal utility.

Question 23Consumer Behaviour and Demand

The law of diminishing marginal utility states that as a consumer consumes more units of the same commodity, the marginal utility of each successive unit:

  1. Increases continuously
  2. Becomes negative at once
  3. Remains constant
  4. Falls Correct answer.

Explanation

The law states that the additional satisfaction from each successive unit of the same commodity becomes smaller as consumption increases, assuming consumption is continuous and in a short period. Marginal utility may later become zero or negative, but the general tendency is a fall.

Question 24Consumer Behaviour and Demand

Total utility is at its maximum when marginal utility is:

  1. Positive
  2. Zero Correct answer.
  3. Negative
  4. Rising

Explanation

Total utility rises as long as marginal utility is positive and stops rising when marginal utility becomes zero, which is the point of satiety. Beyond that point marginal utility is negative and total utility falls.

Question 25Consumer Behaviour and Demand

A consumer's total utility from 3 units is 30 utils and from 4 units is 34 utils. The marginal utility of the fourth unit is:

  1. 8.5 utils
  2. 4 utils Correct answer.
  3. 64 utils
  4. 34 utils

Explanation

Marginal utility is the change in total utility divided by the change in quantity, here 34 minus 30 equals 4 utils. The other figures confuse marginal utility with total utility or with average utility.

Question 26Consumer Behaviour and Demand

The law of equi-marginal utility states that a consumer maximises satisfaction by allocating income so that:

  1. The marginal utility of every good becomes zero
  2. The marginal utility per rupee spent is equal for all goods Correct answer.
  3. The total utility of every good is equal
  4. The marginal utility of money is highest

Explanation

The consumer compares the marginal utility of each good with its price and shifts spending until the ratio of marginal utility to price is the same for every good purchased. This equalisation of marginal utility per rupee is the condition for maximum satisfaction.

Question 27Consumer Behaviour and Demand

The indifference curve approach to consumer behaviour was developed by:

  1. J. R. Hicks and R. G. D. Allen Correct answer.
  2. Irving Fisher alone
  3. Alfred Marshall
  4. Adam Smith

Explanation

The indifference curve technique was introduced by Francis Edgeworth and later developed systematically by Hicks and Allen as an alternative to Marshall's cardinal utility analysis. It uses ordinal utility and does not require measurement of satisfaction in utils.

Question 28Consumer Behaviour and Demand

An indifference curve shows all combinations of two goods that give the consumer:

  1. Equal total expenditure
  2. Maximum possible satisfaction
  3. Equal total utility
  4. The same level of satisfaction Correct answer.

Explanation

Every point on an indifference curve represents a combination of two goods yielding the same total satisfaction, so the consumer is indifferent among them. It does not show expenditure or the maximum attainable satisfaction.

Question 29Consumer Behaviour and Demand

Indifference curves are convex to the origin because of:

  1. Increasing marginal rate of substitution
  2. Diminishing marginal rate of substitution Correct answer.
  3. Zero marginal rate of substitution
  4. Constant marginal rate of substitution

Explanation

As the consumer gives up more of one good to obtain extra units of another, the willingness to sacrifice the first good falls, so the marginal rate of substitution diminishes. This diminishing rate makes the indifference curve convex to the origin.

Question 30Consumer Behaviour and Demand

The slope of a budget line represents:

  1. The consumer's income level
  2. The ratio of the marginal utilities of the two goods
  3. The marginal rate of substitution
  4. The ratio of the prices of the two goods Correct answer.

Explanation

The budget line shows the combinations of two goods a consumer can buy with a given income, and its slope equals the price of the good on the horizontal axis divided by the price of the good on the vertical axis. It therefore reflects relative prices, not tastes or income alone.

Question 31Consumer Behaviour and Demand

A consumer is in equilibrium at the point where the budget line is tangent to an indifference curve. At this point:

  1. The consumer is spending less than income
  2. The marginal rate of substitution equals the price ratio Correct answer.
  3. The indifference curve cuts the budget line twice
  4. The marginal utilities of the two goods are equal

Explanation

At the tangency point the slope of the indifference curve (the marginal rate of substitution) equals the slope of the budget line (the price ratio). This is the condition under which the consumer reaches the highest attainable indifference curve for the given income.

Question 32Consumer Behaviour and Demand

When the price of a good rises, other things remaining constant, the quantity demanded of that good normally:

  1. Rises
  2. Falls Correct answer.
  3. Rises then falls
  4. Remains unchanged

Explanation

The law of demand states an inverse relationship between price and quantity demanded, other things being equal. A higher price reduces purchasing power and encourages substitution, so quantity demanded normally falls.

Question 33Consumer Behaviour and Demand

A movement along a demand curve is caused by a change in:

  1. The price of a substitute good
  2. Consumer income
  3. Consumer tastes
  4. The price of the good itself Correct answer.

Explanation

A change in the good's own price causes a movement along the same demand curve, called a change in quantity demanded. Changes in income, tastes, or prices of related goods shift the entire curve.

Question 34Consumer Behaviour and Demand

If tea and coffee are substitutes, a rise in the price of tea will cause the demand curve for coffee to:

  1. Shift to the left
  2. Become vertical
  3. Shift to the right Correct answer.
  4. Remain in the same position

Explanation

When the price of tea rises, consumers substitute coffee for tea, so the demand for coffee increases at every price. This increase in demand shifts the coffee demand curve to the right.

Question 35Consumer Behaviour and Demand

Two goods are complementary when:

  1. Their prices are always equal
  2. An increase in the price of one lowers the demand for the other Correct answer.
  3. An increase in the price of one raises the demand for the other
  4. They are produced by the same firm

Explanation

Complementary goods are consumed together, such as car and petrol, so a rise in the price of one reduces its consumption and therefore reduces demand for the other. This is the negative cross-price relationship that defines complements.

Question 36Consumer Behaviour and Demand

A Giffen good is one for which:

  1. Demand falls when price rises
  2. Demand rises when price falls
  3. Demand rises when price rises Correct answer.
  4. Demand is perfectly elastic

Explanation

A Giffen good is an inferior good that takes a large share of a poor consumer's budget, so when its price rises the income effect outweighs the substitution effect and quantity demanded increases. This is a rare exception to the law of demand.

Question 37Consumer Behaviour and Demand

The demand for salt is generally inelastic because:

  1. Salt has many close substitutes
  2. Salt is a luxury good
  3. Salt takes a very small share of consumer income Correct answer.
  4. Salt is produced by many firms

Explanation

Price elasticity of demand is low when a good has few substitutes and absorbs only a small part of the consumer's budget, and salt satisfies both conditions. Consumers therefore do not change quantity much when the price changes.

Question 38Consumer Behaviour and Demand

When the price of a good falls from 10 to 8 and quantity demanded rises from 100 to 140 units, the price elasticity of demand (using the percentage method) is:

  1. 4
  2. 2 Correct answer.
  3. 1
  4. 0.5

Explanation

Percentage change in quantity is 40 divided by 100, that is 40 per cent, and percentage change in price is 2 divided by 10, that is 20 per cent. Dividing 40 by 20 gives an elasticity of 2, so demand is elastic.

Question 39Consumer Behaviour and Demand

Total expenditure on a good increases when its price falls, provided demand is:

  1. Elastic Correct answer.
  2. Inelastic
  3. Unitary elastic
  4. Perfectly inelastic

Explanation

When demand is elastic, the percentage rise in quantity demanded exceeds the percentage fall in price, so total expenditure rises. With inelastic demand, a price fall reduces total expenditure.

Question 40Consumer Behaviour and Demand

The demand for a good by an individual consumer at various prices is called:

  1. Composite demand
  2. Joint demand
  3. Market demand
  4. Individual demand Correct answer.

Explanation

Individual demand refers to the quantities one consumer is willing and able to buy at different prices. Market demand is the horizontal summation of all individual demands at each price.

Question 41Consumer Behaviour and Demand

Which of the following will shift the demand curve for a normal good to the right?

  1. A rise in consumer income Correct answer.
  2. A fall in consumer income
  3. A rise in the price of the good
  4. A fall in the price of a substitute

Explanation

For a normal good, higher income increases the quantity demanded at every price, shifting the demand curve to the right. Changes in the good's own price move along the curve, while a cheaper substitute reduces demand.

Question 42Consumer Behaviour and Demand

The 'income effect' of a price change refers to the change in quantity demanded caused by:

  1. A change in the consumer's real income Correct answer.
  2. A change in population
  3. A change in the consumer's tastes
  4. A change in the price of a related good

Explanation

When the price of a good falls, the consumer can buy the same basket with less money, so real income rises and more of the good is demanded. This real-income channel is the income effect, distinct from the substitution effect.

Question 43Consumer Behaviour and Demand

In the indifference curve analysis, the substitution effect of a price fall is shown by movement along:

  1. The same indifference curve to a point with a higher marginal rate of substitution Correct answer.
  2. The budget line to a point of lower satisfaction
  3. The income-consumption curve to a lower point
  4. A higher indifference curve to a point of tangency with a new budget line

Explanation

The substitution effect isolates the change in relative prices by keeping the consumer on the same indifference curve, moving to a point where the marginal rate of substitution equals the new price ratio. The income effect is then shown by the move to a higher indifference curve.

Question 44Consumer Behaviour and Demand

The law of demand assumes that all factors other than price, such as income and tastes, remain:

  1. Constant Correct answer.
  2. Changing
  3. Unpredictable
  4. Increasing

Explanation

The law of demand is a ceteris paribus statement, meaning other determinants of demand are held constant while the own price varies. If income or tastes change, the demand curve shifts and the simple inverse price-quantity relationship is disturbed.

Question 45Consumer Behaviour and Demand

A vertical demand curve indicates that price elasticity of demand is:

  1. Equal to one
  2. Zero Correct answer.
  3. Infinite
  4. Greater than one

Explanation

A vertical demand curve shows the same quantity demanded at every price, so the percentage change in quantity is zero for any price change. Elasticity is therefore zero, and demand is perfectly inelastic.

Question 46Consumer Behaviour and Demand

A consumer spends her entire income of ₹120 on goods X and Y. The price of X is ₹10 and the price of Y is ₹20. What is the slope of her budget line, with quantity of X measured on the horizontal axis?

  1. −6
  2. −10
  3. −2
  4. −0.5 Correct answer.

Explanation

The budget line slope equals the negative ratio of the price of the horizontal-axis good to the price of the vertical-axis good, that is −Px/Py. Substituting the given prices gives −10/20 = −0.5, meaning one extra unit of X requires giving up half a unit of Y. The income of ₹120 fixes the intercepts (12 units of X or 6 units of Y) but does not change the slope.

Question 47Consumer Behaviour and Demand

Marginal utility becomes negative when total utility is:

  1. equal to zero
  2. constant and at its maximum
  3. rising at an increasing rate
  4. falling from its maximum level Correct answer.

Explanation

Total utility rises while marginal utility is positive and reaches its peak where marginal utility is zero. Once consumption passes that point, each additional unit reduces total satisfaction, so total utility falls and marginal utility is negative. Marginal utility therefore turns negative exactly when total utility begins to decline.

Question 48Consumer Behaviour and Demand

A consumer buys 4 units of a good and obtains total utility of 60 utils. The purchase of a fifth unit raises total utility to 68 utils. What is the marginal utility of the fifth unit?

  1. 17 utils
  2. 8 utils Correct answer.
  3. 68 utils
  4. 60 utils

Explanation

Marginal utility is the addition to total utility contributed by one more unit, calculated as the change in total utility divided by the change in quantity. Here the change is 68 − 60 = 8 utils for one extra unit, so marginal utility is 8 utils. It is a difference, not the new total or an average.

Question 49Consumer Behaviour and Demand

In indifference curve analysis, a consumer's equilibrium position changes when income rises while prices stay unchanged. The new equilibrium lies on a higher indifference curve, and the line joining all such equilibrium points is called the:

  1. income consumption curve Correct answer.
  2. price consumption curve
  3. marginal rate of substitution
  4. Engel curve for a single good

Explanation

When income varies and prices are held constant, the budget line shifts outward parallel to itself and the tangency points trace the income consumption curve. This curve shows how the optimal bundle of both goods changes with income. A price consumption curve, by contrast, is traced when the price of one good changes and the budget line pivots.

Question 50Consumer Behaviour and Demand

A consumer's preferences show that bundle A is preferred to bundle B and bundle B is preferred to bundle C. Which property of indifference curve analysis guarantees that the consumer must prefer A to C?

  1. Monotonicity of preferences
  2. Completeness of preferences
  3. Diminishing marginal rate of substitution
  4. Transitivity of preferences Correct answer.

Explanation

Transitivity requires that if A is preferred to B and B is preferred to C, then A must be preferred to C, which makes consumer choices internally consistent. This property is what prevents indifference curves from crossing and allows a consistent ranking of bundles. Completeness only ensures that any two bundles can be compared.