CUET UG Economics Booster Test 2 - Indifference Curves and Preferences -

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CUET UG Economics Booster Test 2 - Indifference Curves and Preferences

⏱️ 30 Minutes

❓ 20 Questions

📌 Answers are locked once submitted — results and explanations appear at the end.

CUET UG Economics Booster Test 2 - Indifference Curves and Preferences

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QUESTION 1 OF 20

Arrange the logical steps explaining why the indifference curve slopes downward from left to right:
1. Total utility level must remain the same on the curve.
2. The consumer must forego some mangoes.
3. The consumer gets one more banana.

Answer Review

1 Arrange the logical steps explaining why the indifference curve slopes downward from left to right:
1. Total utility level must remain the same on the curve.
2. The consumer must forego some mangoes.
3. The consumer gets one more banana.

A 3, 2, 1

B 1, 2, 3

C 3, 1, 2

D 2, 1, 3

💡 Short Explanation

The consumer gets more bananas. To remain on the same curve, mangoes must be reduced. This keeps total utility unchanged.

✅ Correct Answer Explanation

An indifference curve shows combinations that give the same level of satisfaction. When the consumer gets one more banana, she must give up some mangoes so that the total utility remains constant. This trade-off explains why the indifference curve slopes downward from left to right.

❓ Why Other Options Are Incorrect

Option B: Starts with the result before the change in goods.
Option C: Utility can remain the same only after sacrificing mangoes.
Option D: Mangoes are not sacrificed before gaining more bananas.

🎯 Strategy

Used

Sequence

🧠 Memory Trick

More Banana → Less Mango → Same Utility

📚 Consumer's Equilibrium – Downward Sloping Indifference Curve

2 Assertion (A): If a consumer does not forego some mangoes with an increase in the number of bananas, she will move to a higher indifference curve.
Reason (R): Having more bananas with the same number of mangoes represents a preferred bundle giving higher utility.

A Both A and R are true and R is the correct explanation of A

B Both A and R are true but R is not the correct explanation of A

C A is true, R is false

D A is false, R is true

💡 Short Explanation

More bananas with same mangoes gives higher utility. A higher utility bundle lies on a higher indifference curve. The reason correctly explains the assertion.

✅ Correct Answer Explanation

An indifference curve represents equal utility. If the consumer gets more bananas without giving up mangoes, she has more of one good and no less of the other. Under monotonic preferences, this gives higher satisfaction and moves the consumer to a higher indifference curve. Therefore, both the assertion and reason are true, and the reason correctly explains the assertion.

❓ Why Other Options Are Incorrect

Option B: The reason directly explains the assertion.
Option C: The reason is true.
Option D: The assertion is also true.

🎯 Strategy

Used

Assertion–Reason

🧠 Memory Trick

More + No Less = Higher IC

📚 Consumer's Equilibrium – Monotonic Preferences and Indifference Curves

3 Match the change in Marginal Rate of Substitution (MRS) with the movement along the convex indifference curve representing bananas and mangoes.

List I	List II
1. Moving from point A to B	a. Consumer sacrifices 3 mangoes for 1 banana
2. Moving from point B to C	b. Consumer sacrifices 2 mangoes for 1 banana
3. Moving from point C to D	c. Consumer sacrifices 1 mango for 1 banana
4. Moving from point D to E	d. Consumer sacrifices smaller amount than before

A 1-a, 2-b, 3-c, 4-d

B 1-c, 2-a, 3-b, 4-d

C 1-b, 2-c, 3-a, 4-d

D 1-a, 2-c, 3-b, 4-d

💡 Short Explanation

MRS diminishes along a convex indifference curve. The consumer sacrifices fewer mangoes for each extra banana. This creates convexity to the origin.

✅ Correct Answer Explanation

As the consumer moves down along a convex indifference curve, she gets more bananas and fewer mangoes. Due to diminishing marginal rate of substitution, she is willing to sacrifice smaller and smaller amounts of mangoes for each additional banana. Hence, the sacrifice falls from 3 mangoes to 2 mangoes to 1 mango and then even smaller amounts.

❓ Why Other Options Are Incorrect

Option B: Starts with the lowest sacrifice instead of the highest.
Option C: Does not follow diminishing MRS.
Option D: Incorrectly matches movement B to C and C to D.

🎯 Strategy

Used

Match the Following

🧠 Memory Trick

Move Down IC → MRS Falls

📚 Consumer's Equilibrium – Diminishing Marginal Rate of Substitution

4 Which of the following statements analytically apply to the most common shape of an indifference curve?
I. It is convex to the origin.
II. It is caused by the Law of Diminishing Marginal Rate of Substitution.
III. It applies strictly to goods that are perfect substitutes.

A I and II only

B II and III only

C I and III only

D I, II, and III

💡 Short Explanation

Ordinary indifference curves are convex. Convexity is due to diminishing MRS. Perfect substitutes have straight-line indifference curves.

✅ Correct Answer Explanation

The most common shape of an indifference curve is convex to the origin. This shape occurs because of the Law of Diminishing Marginal Rate of Substitution, where the consumer sacrifices less and less of one good for each additional unit of another good. Perfect substitutes are an exception because their indifference curves are straight lines.

❓ Why Other Options Are Incorrect

Option B: Statement III is incorrect.
Option C: Statement III is incorrect.
Option D: Perfect substitutes do not have ordinary convex indifference curves.

🎯 Strategy

Used

Multi-correct

🧠 Memory Trick

Ordinary Goods → Convex IC | Perfect Substitutes → Straight IC

📚 Consumer's Equilibrium – Shape of Indifference Curve

5 For goods that are perfect substitutes, such as five-rupee coins and five-rupee notes, irrespective of how many notes she has, the consumer will sacrifice exactly ____________ coin(s) for an additional note.

A Decreasing amounts of

B Two

C One

D Zero

💡 Short Explanation

Perfect substitutes have constant MRS. Five-rupee coin and note have the same value. The sacrifice ratio remains 1:1.

✅ Correct Answer Explanation

Five-rupee coins and five-rupee notes are perfect substitutes because they provide the same satisfaction and value to the consumer. Therefore, the consumer is always willing to exchange one five-rupee coin for one five-rupee note, regardless of how many notes she already has.

❓ Why Other Options Are Incorrect

Option A: Decreasing sacrifice applies to ordinary goods with diminishing MRS.
Option B: The exchange ratio is not 2:1.
Option D: The consumer must sacrifice one coin to get one note.

🎯 Strategy

Used

Statement Completion

🧠 Memory Trick

Perfect Substitute = Fixed 1:1 Exchange

📚 Consumer's Equilibrium – Perfect Substitutes and Constant MRS

6 Assertion (A): The indifference curve depicting two commodities which are perfect substitutes is a straight line.
Reason (R): For perfect substitutes, the marginal rate of substitution does not diminish; it remains the same.

A Both A and R are true and R is the correct explanation of A

B Both A and R are true but R is not the correct explanation of A

C A is true, R is false

D A is false, R is true

💡 Short Explanation

Perfect substitutes have constant MRS. Constant MRS creates a straight-line indifference curve. The reason correctly explains the assertion.

✅ Correct Answer Explanation

For perfect substitutes, the consumer is willing to substitute one good for another at a constant rate. Since the Marginal Rate of Substitution remains the same and does not diminish, the indifference curve becomes a straight line.

❓ Why Other Options Are Incorrect

Option B: The reason correctly explains the assertion.
Option C: The reason is true.
Option D: The assertion is also true.

🎯 Strategy

Used

Assertion–Reason

🧠 Memory Trick

Perfect Substitutes → Constant MRS → Straight Line

📚 Consumer's Equilibrium – Perfect Substitutes

7 Match the structural components of an Indifference Map:

List I	List II
1. Points on the same curve	a. Bundles considered indifferent by the consumer
2. Different curves in the family	b. Bundles giving different levels of utility
3. Higher indifference curve	c. Represents higher satisfaction
4. Lower indifference curve	d. Represents lower satisfaction

A 1-a, 2-b, 3-c, 4-d

B 1-b, 2-a, 3-d, 4-c

C 1-a, 2-c, 3-b, 4-d

D 1-d, 2-c, 3-a, 4-b

💡 Short Explanation

Same curve means equal utility. Different curves show different utility levels. Higher curves give higher satisfaction.

✅ Correct Answer Explanation

An indifference map contains a family of indifference curves. Points on the same indifference curve give equal satisfaction, so the consumer is indifferent among them. Different curves represent different levels of utility, with higher curves showing higher satisfaction and lower curves showing lower satisfaction.

❓ Why Other Options Are Incorrect

Option B: Reverses same-curve and different-curve meanings.
Option C: Incorrectly matches different curves with higher satisfaction only.
Option D: Mismatches all structural components.

🎯 Strategy

Used

Match the Following

🧠 Memory Trick

Same Curve = Same Utility | Higher Curve = Higher Utility

📚 Consumer's Equilibrium – Indifference Map

8 Arrange the steps to graphically represent monotonic preferences on an indifference map:
1. Plot available bundles as points in a two-dimensional diagram.
2. Identify that bundles on the curve above are preferred to bundles on the curve below.
3. Draw a family of indifference curves representing different utility levels.

A 1, 3, 2

B 2, 1, 3

C 3, 2, 1

D 1, 2, 3

💡 Short Explanation

First plot consumption bundles. Then draw indifference curves. Higher curves show preferred bundles.

✅ Correct Answer Explanation

To represent preferences graphically, available bundles are first plotted as points in a two-dimensional diagram. Then a family of indifference curves is drawn to show different utility levels. Finally, due to monotonic preferences, higher indifference curves are interpreted as preferred over lower ones.

❓ Why Other Options Are Incorrect

Option B: Preference ranking cannot be identified before plotting bundles.
Option C: Curves cannot be meaningfully drawn before plotting bundles.
Option D: Higher-curve preference is interpreted after the family of curves is drawn.

🎯 Strategy

Used

Sequence

🧠 Memory Trick

Plot → Draw Curves → Rank Curves

📚 Consumer's Equilibrium – Indifference Map and Monotonic Preferences

9 Assertion (A): Combination C (3 bananas, 10 mangoes) lies on a higher indifference curve than Combination B (2 bananas, 10 mangoes).
Reason (R): A higher indifference curve provides a lower level of satisfaction to the consumer.

A Both A and R are true

B Both A and R are false

C A is true, R is false

D A is false, R is true

💡 Short Explanation

C has more bananas than B. Mangoes remain the same. Higher indifference curves represent higher, not lower, satisfaction.

✅ Correct Answer Explanation

Combination C contains 3 bananas and 10 mangoes, while Combination B contains 2 bananas and 10 mangoes. Since C has more bananas and no fewer mangoes, it gives higher satisfaction and lies on a higher indifference curve. However, the Reason is false because a higher indifference curve represents a higher level of satisfaction, not a lower one.

❓ Why Other Options Are Incorrect

Option A: The Reason is false.
Option B: The Assertion is true.
Option D: The Assertion is true and the Reason is false.

🎯 Strategy

Used

Assertion–Reason

🧠 Memory Trick

Higher IC = Higher Satisfaction

📚 Consumer's Equilibrium – Higher Indifference Curve

10 Why does an individual always prefer more of a commodity, pushing them to a higher indifference curve?
I. Because the marginal utility of the commodity remains positive.
II. Because more of the commodity will increase the level of satisfaction.
III. Because prices of goods always decrease on higher curves.

A I and II only

B II and III only

C I and III only

D I, II, and III

💡 Short Explanation

Positive marginal utility makes more goods desirable. More consumption increases satisfaction. Prices are not represented by indifference curves.

✅ Correct Answer Explanation

A consumer prefers more of a commodity as long as its marginal utility is positive. More of the commodity increases satisfaction and moves the consumer to a higher indifference curve. Prices are shown through the budget line, not through indifference curves.

❓ Why Other Options Are Incorrect

Option B: Statement III is incorrect.
Option C: Statement III is incorrect.
Option D: Prices do not always decrease on higher curves.

🎯 Strategy

Used

Multi-correct

🧠 Memory Trick

Positive MU → More Preferred → Higher IC

📚 Consumer's Equilibrium – Monotonic Preferences and Higher Indifference Curve

11 Arrange the logical sequence used to prove that two indifference curves (IC₁ and IC₂) cannot intersect:
1. Points A and C are on IC₂, meaning utility of A = utility of C.
2. This implies utility of B = utility of C, which is absurd because B has more goods than C.
3. Assume IC₁ and IC₂ intersect at point A, with point B on IC₁ and point C on IC₂.
4. Points A and B are on IC₁, meaning utility of A = utility of B.

A 3, 4, 1, 2

B 1, 2, 3, 4

C 3, 1, 4, 2

D 4, 3, 1, 2

💡 Short Explanation

Assume the curves intersect. Equal utilities are derived from both curves. This creates a contradiction.

✅ Correct Answer Explanation

To prove that indifference curves cannot intersect, first assume that IC₁ and IC₂ intersect at point A. Since A and B lie on IC₁, they provide equal utility. Similarly, A and C lie on IC₂, so they also provide equal utility. This implies that B and C provide equal utility, which is impossible because B contains more of one good while having the same amount of the other. Therefore, indifference curves can never intersect.

❓ Why Other Options Are Incorrect

Option B: Begins with equalities before making the assumption.
Option C: Uses the equalities in the wrong logical order.
Option D: Starts with a conclusion before the assumption.

🎯 Strategy

Used

Sequence

🧠 Memory Trick

Assume → Equal → Equal → Contradiction

📚 Consumer's Equilibrium – Properties of Indifference Curves (Non-Intersection)

12 If indifference curves intersect, it implies that utility from point B and point C is the same. This is absurd because at point B, the consumer gets a greater number of mangoes with the same quantity of bananas, making the consumer strictly ____________ at point B than at point C.

A Worse off

B Better off

C Indifferent

D Neutral

💡 Short Explanation

B has more mangoes. Bananas remain the same. More goods give higher satisfaction.

✅ Correct Answer Explanation

Point B contains more mangoes while the number of bananas remains unchanged. According to monotonic preferences, a bundle with more of one good and no less of the other is always preferred. Hence, the consumer is better off at point B than at point C, proving that intersecting indifference curves lead to an absurd result.

❓ Why Other Options Are Incorrect

Option A: More goods cannot make the consumer worse off.
Option C: The consumer cannot be indifferent because B is a superior bundle.
Option D: The consumer clearly prefers B over C.

🎯 Strategy

Used

Statement Completion

🧠 Memory Trick

Same Bananas + More Mangoes = Better Bundle

📚 Consumer's Equilibrium – Non-Intersection of Indifference Curves

13 If Combination A is (1 banana, 10 mangoes) and Combination B is (2 bananas, 10 mangoes), what dictates that B provides a higher level of satisfaction?

A Combination B is more expensive.

B Combination B has the same quantity of mangoes but more bananas.

C Combination A and B are perfect substitutes.

D Combination A contains fewer total utility units intrinsically.

💡 Short Explanation

Mangoes remain unchanged. Bananas increase. More of a good gives higher satisfaction.

✅ Correct Answer Explanation

Since both bundles contain the same quantity of mangoes, the only difference is that Bundle B has one additional banana. Under monotonic preferences, consumers always prefer more of at least one good without having less of the other. Therefore, Bundle B provides a higher level of satisfaction.

❓ Why Other Options Are Incorrect

Option A: Price is not considered in this comparison.
Option C: The bundles are not examples of perfect substitutes.
Option D: Satisfaction is determined by preferences, not intrinsic utility numbers.

🎯 Strategy

Used

Concept MCQ

🧠 Memory Trick

Same Mangoes → More Bananas = Higher Satisfaction

📚 Consumer's Equilibrium – Monotonic Preferences

14 If a hypothetical Combination D provides the exact same level of total utility as Combination A, which analytical conditions hold true?
I. Combination D and A lie on the same indifference curve.
II. The consumer is strictly indifferent between Combination D and A.
III. Combination D must have more of both goods than A.

A I and II only

B II and III only

C I and III only

D I, II, and III

💡 Short Explanation

Equal utility means the same indifference curve. The consumer is indifferent between the bundles. Equal utility does not require more of both goods.

✅ Correct Answer Explanation

Bundles that provide the same level of utility lie on the same indifference curve. Since the consumer receives equal satisfaction from both bundles, she is indifferent between them. However, Combination D does not have to contain more of both goods because equal satisfaction can result from different combinations of the two goods.

❓ Why Other Options Are Incorrect

Option B: Statement III is incorrect.
Option C: Statement III is incorrect.
Option D: Equal utility does not imply more of both goods.

🎯 Strategy

Used

Multi-correct

🧠 Memory Trick

Same Utility → Same Curve → Indifferent

📚 Consumer's Equilibrium – Indifference Curve

15 Match the bundle comparisons strictly under the rules of monotonic preferences.

List I	List II
1. Bundle (10, 10) vs Bundle (10, 9)	a. Preferred because it has more of both goods
2. Bundle (10, 10) vs Bundle (9, 9)	b. Preferred because it has more of one good and no less of the other
3. Bundle (8, 10) vs Bundle (8, 9)	c. Preferred because it has more of one good and no less of the other
4. Bundle (12, 12) vs Bundle (10, 10)	d. Preferred because it has more of both goods

A 1-b, 2-a, 3-c, 4-d

B 1-b, 2-b, 3-c, 4-d

C 1-a, 2-b, 3-d, 4-c

D 1-c, 2-a, 3-b, 4-d

💡 Short Explanation

More of one good with none less is preferred. More of both goods is always preferred. This follows monotonic preferences.

✅ Correct Answer Explanation

Under monotonic preferences, consumers always prefer a bundle that has more of at least one good and no less of the other. Thus, (10,10) is preferred over (10,9) and (9,9), while (8,10) is preferred over (8,9). A bundle like (12,12), having more of both goods than (10,10), provides a higher level of satisfaction.

❓ Why Other Options Are Incorrect

Option A: Incorrectly classifies Bundle (10,10) vs (9,9).
Option C: Incorrectly matches the third and fourth comparisons.
Option D: Incorrectly matches multiple bundle comparisons.

🎯 Strategy

Used

Match the Following

🧠 Memory Trick

More + No Less = Better | More of Both = Best

📚 Consumer's Equilibrium – Monotonic Preferences

16 Based on the passage, if bundle A has 4 bananas and 5 mangoes, and bundle B has 4 bananas and 6 mangoes, which bundle will the consumer prefer under monotonic preferences?

A Bundle A

B Bundle B

C The consumer is indifferent

D Cannot be determined

💡 Short Explanation

Both bundles have the same bananas. Bundle B has more mangoes. More of one good with no less of the other is preferred.

✅ Correct Answer Explanation

Under monotonic preferences, a consumer always prefers a bundle that has more of at least one good and no less of the other. Since both bundles contain 4 bananas but Bundle B has 6 mangoes compared to 5 in Bundle A, Bundle B provides a higher level of satisfaction and is therefore preferred.

❓ Why Other Options Are Incorrect

Option A: Bundle A has fewer mangoes.
Option C: The bundles do not provide equal quantities of goods.
Option D: The preference can be determined using monotonic preferences.

🎯 Strategy

Used

Passage-Based MCQ

🧠 Memory Trick

Same Bananas + More Mangoes = Better Bundle

📚 Consumer's Equilibrium – Monotonic Preferences

17 Arrange the sequential order of forming a mathematical consumption bundle based on the text:
1. State that variables can be positive or zero.
2. Use variables x₁ and x₂ to denote the quantities of bananas and mangoes.
3. Form a specific combination like (5, 10) representing a bundle.

A 2, 1, 3

B 1, 2, 3

C 3, 2, 1

D 2, 3, 1

💡 Short Explanation

Assign variables first. Specify their possible values. Form the consumption bundle.

✅ Correct Answer Explanation

The mathematical representation begins by assigning x₁ and x₂ to represent the quantities of bananas and mangoes. These variables can take positive values or zero. Finally, a specific ordered pair such as (5, 10) is formed to represent a consumption bundle.

❓ Why Other Options Are Incorrect

Option B: Variable values cannot be discussed before defining the variables.
Option C: A bundle cannot be formed before assigning variables.
Option D: Variables must be assigned before creating the bundle.

🎯 Strategy

Used

Sequence

🧠 Memory Trick

Variables → Values → Bundle

📚 Consumer's Equilibrium – Consumption Bundles

18 Which of the following mathematical statements are true about the variables x₁ and x₂ representing quantities in a consumption bundle?
I. They can be positive numbers.
II. They can be zero.
III. They can be negative numbers.

A I only

B I and II only

C II and III only

D I, II, and III

💡 Short Explanation

Commodity quantities can be positive. They may also be zero. Negative quantities are not possible.

✅ Correct Answer Explanation

The variables x₁ and x₂ denote the quantities of goods in a consumption bundle. Quantities can be positive or zero, but they cannot be negative because a consumer cannot possess a negative amount of a commodity. Therefore, only Statements I and II are correct.

❓ Why Other Options Are Incorrect

Option A: Ignores that quantities can also be zero.
Option C: Negative quantities are not valid.
Option D: Quantities of goods cannot be negative.

🎯 Strategy

Used

Multi-correct

🧠 Memory Trick

Quantity ≥ 0 (Positive or Zero Only)

📚 Consumer's Equilibrium – Consumption Bundles & Mathematical Representation

📄 Passage

"In economics, it is generally assumed that the consumer is a rational individual. A rational individual clearly knows what is good or what is bad for her, and in any given situation, she always tries to achieve the best for herself. Thus, not only does a consumer have well-defined preferences over the set of available bundles, she also acts according to her preferences. From the bundles which are available to her, a rational consumer always chooses the one which gives her maximum satisfaction."

Based on the passage, what dual assumptions are made about a rational consumer's preferences?

A She has well-defined preferences and acts according to them.

B She prefers fewer goods and minimizes costs.

C She acts randomly but maximizes savings.

D She is indifferent to all bundles and never makes a choice.

💡 Short Explanation

Preferences are clearly defined. The consumer follows those preferences. She chooses the most satisfying bundle.

✅ Correct Answer Explanation

The passage explains that a rational consumer has well-defined preferences over all available bundles and consistently acts according to those preferences. She selects the bundle that provides the maximum satisfaction, reflecting rational decision-making.

❓ Why Other Options Are Incorrect

Option B: Rationality is not defined as preferring fewer goods.
Option C: Rational consumers do not make random choices.
Option D: Rational consumers are not indifferent to all bundles.

🎯 Strategy

Used

Passage-Based MCQ

🧠 Memory Trick

Know Your Preference → Follow It

📚 Consumer's Equilibrium – Rational Consumer

📄 Passage

According to the text, what defines the "best" outcome that a rational individual always tries to achieve from the available bundles?

A The bundle with the lowest marginal rate of substitution.

B The bundle that gives her maximum satisfaction.

C The bundle that leaves the most unspent income.

D The bundle with only inferior goods.

💡 Short Explanation

Rational consumers maximize satisfaction. They compare available bundles. They choose the best available bundle.

✅ Correct Answer Explanation

The passage clearly states that a rational consumer always chooses the bundle that provides the maximum satisfaction from the available alternatives. This objective forms the basis of consumer choice theory in economics.

❓ Why Other Options Are Incorrect

Option A: MRS is not the objective of the consumer.
Option C: Maximum unspent income is not the decision criterion.
Option D: Inferior goods do not define rational choice.

🎯 Strategy

Used

Passage-Based MCQ

🧠 Memory Trick

Rational Consumer = Maximum Satisfaction

📚 Consumer's Equilibrium – Rational Consumer and Consumer Choice

CUET UG Economics Booster Test 2 - Indifference Curves and Preferences

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