Board Paper of Class 12-Science 2017 Economics (SET 2) - Solutions
General Instructions:
(i) All questions in both sections are compulsory. However, there is internal choice in some questions.
(ii) Marks for questions are indicated against each question.
(iii) Question No.1-5 and 16-20 are very short answer questions carrying 1 mark each. They are required to be answered in one sentence.
(iv) Question No.6-8 and 21-23 are short answer questions carrying 3 marks each. Answers to them should not normally exceed 60 words each.
(v) Question No.9-11 and 24-26 are also short answer questions carrying 4 marks each. Answers to them should not normally exceed 70 words each.
(vi) Question No.12-15 and 27-30 are long answer questions carrying 6 marks each. Answers to them should not normally exceed 100 words each.
(vii) Answers should be brief and to the point and the above word limit be adhered to as far as possible.
- Question 1
Define market demand. (1) VIEW SOLUTION
- Question 2
Average revenue and price are always equal under : (choose the correct alternative) (1)
(a) perfect competition only
(b) monopolistic competition only
(c) monopoly only
(d) all market forms VIEW SOLUTION
- Question 3
State any one feature of oligopoly. (1) VIEW SOLUTION
- Question 4
The demand of a commodity when measured through the expenditure approach is inelastic. A fall in its price will result in : (choose the correct alternative) (1)
(a) no change in expenditure on it.
(b) increase in expenditure on it.
(c) decrease in expenditure on it.
(d) any one of the above. VIEW SOLUTION
- Question 5
As we move along a downward sloping straight line demand curve from left to right, price elasticity of demand : (choose the correct alternative) (1)
(a) remains unchanged
(b) goes on falling
(c) goes on rising
(d) falls initially then rises VIEW SOLUTION
- Question 6
Explain the problem of 'what to produce.' (3) VIEW SOLUTION
- Question 7
Show that demand of a commodity is inversely related to its price. (3)
Explain with the help of utility analysis.
Or
Why is an indifference curve negatively sloped? Explain. VIEW SOLUTION
- Question 8
State the meaning and properties of production possibilities frontier. (3) VIEW SOLUTION
- Question 9
A consumer consumes only two goods. Explain the conditions of consumer's equilibrium using utility analysis. (4) VIEW SOLUTION
- Question 10
Explain the 'free entry and exit of firms' feature of monopolistic competition. (4) VIEW SOLUTION
- Question 11
State different phases of the law of variable proportions on the basis to total product. Use diagram. (4)
Or
Explain the geometric method of measuring price elasticity of supply. Use diagram. VIEW SOLUTION
- Question 12
Given below is the cost schedule of a product produced by a firm. The market price per unit of the product at all levels of output is Rs. 12. Using marginal cost and marginal revenue approach, find out the level of equalibrium output. Give reasons for your answer: (6)
Output (Units) 1 2 3 4 5 6 Average Cost (Rs.) 12 11 10 10 10.4 11
- Question 13
When price of a commodity X falls by 10 per cent, its demand rises from 150 units to 180 units. Calculate is price elasticity of demand. How much should be the percentage fall in its price so that its demand rises from 150 to 210 units? (6) VIEW SOLUTION
- Question 14
X and Y are complementary goods. The price of Y falls. Explain the chain of effects of this change in the market of X.
Or
Explain the chain of effect of excess demand of a good on it equilibrium price. (6) VIEW SOLUTION
- Question 15
Complete the following table : (6)
Output units Total cost Rs. Average variable cost Rs. Marginal cost Rs. Average fixed cost Rs. 0 30 1 ... ... 20 ... 2 68 ... ... ... 3 84 18 ... ... 4 ... ... 18 ... 5 125 19 ... 6
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