Theory of Consumer Behaviour Quiz - ICSE Class 12 Economics

Free practice quiz: Theory of Consumer Behaviour (ICSE Class 12 Economics). 49 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This ICSE Class 12 Economics practice quiz has 49 multiple-choice questions on Theory of Consumer Behaviour, and 49 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. The Law of Diminishing Marginal Utility states that as a consumer consumes more units of a commodity, the additional utility derived from each successive unit will:

   1. Increase at an increasing rate
   2. Increase at a diminishing rate
   3. Remain constant
   4. Decrease at an increasing rate
   Show answer

   Answer: B. Increase at a diminishing rate

   The Law of Diminishing Marginal Utility posits that beyond a certain point, the extra satisfaction a consumer gets from consuming an additional unit of a good or service decreases with each new unit, even if the total utility increases.

2. The concept of 'consumer surplus' is best described as:

   1. The total expenditure by the consumer on a good.
   2. The difference between the price a consumer is willing to pay for a good and the price they actually pay.
   3. The additional utility gained from consuming one more unit of a good.
   4. The amount of money a consumer saves by buying in bulk.
   Show answer

   Answer: B. The difference between the price a consumer is willing to pay for a good and the price they actually pay.

   Consumer surplus represents the economic benefit a consumer derives from purchasing a good or service. It is the difference between the maximum price a consumer is willing to pay (their valuation) and the actual market price they pay.

3. Consider a budget line represented by the equation 20X + 10Y = 200. If the price of X is Rs. 20 and the price of Y is Rs. 10, what is the consumer's income?

   1. Rs. 100
   2. Rs. 200
   3. Rs. 20
   4. Rs. 10
   Show answer

   Answer: B. Rs. 200

   The equation of a budget line is Px*X + Py*Y = Income. Given Px = 20 and Py = 10, the equation is 20X + 10Y = Income. The provided equation is 20X + 10Y = 200. Therefore, the consumer's income is Rs. 200.

4. If the income elasticity of demand for a good is positive, it is a(n):

   1. Inferior good
   2. Normal good
   3. Giffen good
   4. Luxury good
   Show answer

   Answer: B. Normal good

   Income elasticity of demand measures the responsiveness of demand to changes in income. A positive income elasticity indicates that as income increases, demand for the good also increases, which is characteristic of normal goods.

5. The 'law of demand' is generally represented by a demand curve that is:

   1. Upward sloping
   2. Downward sloping
   3. Horizontal
   4. Vertical
   Show answer

   Answer: B. Downward sloping

   The law of demand states that, ceteris paribus, as the price of a good increases, the quantity demanded decreases, and vice versa. This inverse relationship is depicted by a downward-sloping demand curve.

More questions in this quiz

Answers and explanations are in the full quiz.

1. Indifference curves are:
2. The Marginal Rate of Substitution (MRS) between two goods X and Y measures:
3. A consumer's equilibrium is achieved when:
4. Which of the following is NOT a property of indifference curves?
5. The income effect of a price change refers to the change in consumption of a good that results from:
6. For a Giffen good, the demand curve:
7. When the price of a good falls, and the consumer's real income increases, leading to an increase in the consumption of that good, this illustrates:
8. A consumer spends Rs. 100 on two goods, X and Y. The price of X is Rs. 10 and the price of Y is Rs. 20. The marginal utility of X is 30 utils and the marginal utility of Y is 40 utils. If the consumer wants to maximize utility, they should:
9. For an inferior good, as income increases, the demand for the good:
10. The slope of the budget line represents:
11. If the marginal utility of the last rupee spent on good X is 8 and on good Y is 5, and the price of X is Rs. 4 and the price of Y is Rs. 3, the consumer is:
12. A change in the price of a good leads to a movement ALONG the demand curve, while a change in income leads to a SHIFT of the demand curve. This statement is:
13. The Engel curve illustrates the relationship between:
14. Which of the following describes a situation where the income effect and substitution effect work in opposite directions?
15. The 'law of equi-marginal utility' is also known as:
16. If good X is a substitute for good Y, then a decrease in the price of good Y will lead to:
17. The demand for a commodity is elastic if the price elasticity of demand is:
18. The substitution effect always leads to:
19. If the marginal rate of substitution (MRS) is 2 and the price ratio (Px/Py) is 3, the consumer is currently in a state where:
20. A good for which demand increases as income increases is known as a:
21. The ordinal approach to consumer behavior assumes:
22. If the demand for a commodity is unit elastic, a 10% decrease in its price will lead to:
23. Which of the following pairs of goods are typically considered complements?
24. The concept of 'total utility' refers to:
25. A consumer is in equilibrium on an indifference curve when the slope of the indifference curve is equal to the slope of the budget line. This equality is known as:
26. Which of the following factors will cause a rightward shift in the demand curve for coffee?
27. The ordinal utility approach primarily uses the concept of:
28. If the price of a good decreases by 5% and the quantity demanded increases by 15%, the price elasticity of demand is:
29. The statement 'The consumer is rational' in economic theory implies that the consumer:
30. Which of the following correctly describes the relationship between total utility and marginal utility when marginal utility is positive but diminishing?
31. A consumer will continue to buy more of a single good as long as:
32. The slope of an indifference curve is called the:
33. The entire budget line shifts inwards and remains parallel to the original budget line. This indicates:
34. The law of diminishing marginal rate of substitution implies that indifference curves are:
35. Consider a situation where MUx/Px = 5 and MUy/Py = 3. The consumer is currently spending Rs. 100 on X and Rs. 100 on Y, with the price of X being Rs. 10 and the price of Y being Rs. 5. To reach equilibrium, the consumer should:
36. If the demand for a good is perfectly inelastic, its price elasticity of demand is:
37. Which of the following is a characteristic of the cardinal utility approach to consumer behavior?
38. The income effect for an inferior good when its price falls is:
39. If two indifference curves intersect, it violates the assumption of:
40. Which of the following is a property of a budget line?
41. If MUx/Px > MUy/Py, a rational consumer will:
42. The 'diamond-water paradox' is a classic example used to illustrate:
43. For a normal good, an increase in income leads to:
44. When the price of a good falls, the substitution effect causes the consumer to buy:

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