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NCERT Solutions For Class 12 Economics Chapter 5 Market Equilibrium - 2025-26

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Market Equilibrium Questions and Answers - Free PDF Download

If you’re aiming to secure full marks in CBSE Class 12 Economics, Chapter 5—Government Budget and the Economy—is considered essential. This NCERT Solutions set focuses closely on Indian economic budgeting, helping you quickly clarify concepts like components of government budget, fiscal deficit, and allocation and redistribution through budget.


Board exams often include direct questions such as, “How do fiscal deficit and primary deficit differ?” Accurate understanding and answer framing here are vital. As this chapter carries around 6 marks and is regularly asked in recent CBSE papers, sharp revision with these exam-ready solutions boosts your confidence and scoring potential.


Each answer highlights objectives of budget policy, breaks down capital and revenue expenditure, and covers key formulas from the latest board syllabus. Trusted by students nationwide, Vedantu ensures you get reliable, syllabus-aligned support exactly where it matters most for your final exam.

Access NCERT Solutions for Economics Class 12 Chapter-05 (Microeconomics) Market Equilibrium

```html 1. Explain market equilibrium.
Ans: A market is in equilibrium when demand equals supply. At this point, there is no pressure for price to move. The equilibrium price is where buyers and sellers agree to trade.

2. When do we say that there is an excess demand for a commodity in the market?
Ans: There is excess demand when demand for a product is greater than the supply available at a certain price.

3. When do we say that there is an excess supply for a commodity in the market?
Ans: When the quantity supplied in the market is more than what buyers want at a set price, we have excess supply.

4. What will happen if the price prevailing in the market is?
i. Above the equilibrium price
ii. Below the equilibrium price

Ans: Summary: If price is above equilibrium, there is excess supply, making prices fall. If below equilibrium, there is excess demand, making prices rise. - If price is above equilibrium: Supply is more than demand, creating excess supply. This pushes the price down, supply falls and demand rises. Prices keep adjusting down until supply and demand are equal again (equilibrium). - If price is below equilibrium: Demand is more than supply, creating excess demand. This causes prices to rise, supply goes up and demand falls. Prices keep adjusting up until the market returns to equilibrium.

5. Explain how price is determined in a perfectly competitive market with a fixed number of firms.
Ans: In a perfectly competitive market, the equilibrium price is found where total demand equals total supply. The market price is set where the demand and supply curves meet.

6. Suppose the price at which the equilibrium is attained in exercise 5 is above the minimum average cost of the firms constituting the market. Now if we allow for free entry and exit of firms, how will the market price adjust to it?
Ans: Summary: If firms can enter freely and are earning extra profit, more firms will join, raising supply and lowering price until only normal profits remain. - If the equilibrium price is above minimum average cost, existing firms earn extra (supernormal) profit. - This attracts new firms to enter the market. - As more firms enter, overall market supply increases. - The increased supply causes prices to fall. - This keeps happening until price falls to equal minimum average cost (normal profit). - At that point, firms neither gain nor lose, and no new firms want to enter or existing ones to leave.

7. At what level of price do the firms in a perfectly competitive market supply when free entry and exit is allowed in the market? How is the equilibrium quantity determined in such a market?
Ans: In the long run, with free entry and exit, all firms earn normal profit and price equals the minimum average cost. The equilibrium quantity is found where the demand curve meets the line P = min AC.

8. How is the equilibrium number of firms determined in a market where entry and exit is permitted?
Ans: Summary: With free entry and exit, the number of firms is set so that price equals minimum long-run average cost. - When all firms earn normal profit (price = minimum of LAC), no new firms enter and none leave. - The equilibrium number of firms, N, is found as N = Q1/Q1f: - Q1: market equilibrium output - Q1f: output supplied by each firm at equilibrium price - All firms are similar and supply the same amount at the equilibrium price.

9. How are equilibrium price and quantity affected when income of the consumers
a) Increase
b) Decrease

Ans: (a) When income increases: - Demand curve shifts right. - Equilibrium price and output both increase as consumers buy more. (b) When income decreases: - Demand curve shifts left. - Equilibrium price and output both decrease as consumers buy less. This is typically true for normal goods.

10. Using supply and demand curves show how an increase in the price of shoes affects the price of a pair of socks and the number of pairs of socks bought and sold.
Ans: An increase in shoe prices (a complementary good to socks) reduces demand for socks. The demand curve for socks shifts left, price of socks falls, and fewer pairs are bought and sold.

11. How will a change in the price of coffee affect the equilibrium price of tea? Explain the effect on equilibrium quantity also through a diagram.
Ans: Summary: Coffee and tea are substitutes. If coffee price rises, tea demand and price increase. If coffee price falls, tea demand and price decrease. - If coffee price increases: - People buy less coffee and more tea. - Tea demand curve shifts right. - Equilibrium price and quantity of tea both rise. - If coffee price decreases: - More people buy coffee, less tea. - Tea demand curve shifts left. - Equilibrium price and quantity of tea both fall.

12. How do the equilibrium price and the quantity of a commodity change when the price of input used in its production changes?
Ans: Summary: If input cost rises, supply falls, and price rises; if input cost falls, supply rises, and price drops. (a) Input price increases: - Production cost rises. - Supply decreases, shifting supply curve left. - Equilibrium price rises, quantity falls. (b) Input price decreases: - Production cost falls. - Supply increases, shifting supply curve right. - Equilibrium price falls, quantity rises.

13. If the price of a substitute Y of good X increases, what impact does it have on the equilibrium price and quantity of good X?
Ans: Summary: When the price of substitute Y rises, demand and price for X increase. - Higher Y price reduces demand for Y, making buyers choose X instead. - Demand for X rises; demand curve shifts right. - Equilibrium price and quantity for X both increase.

14. Compare the effect of shift in the demand curve on the equilibrium when the number of firms in the market is fixed with the situation when entry-exit is permitted.
Ans: Summary: With a fixed number of firms, a demand shift changes both price and quantity a lot. With free entry/exit, only quantity changes a lot; price stays at minimum AC. - Short run (fixed firms): Demand increase raises both price and quantity. Demand decrease lowers both. - Long run (free entry/exit): Demand increase only raises quantity; price stays same at min AC. Demand decrease only lowers quantity; price again stays at min AC.

15. Explain through a diagram the effect of a rightward shift of both the demand and supply curves on equilibrium price and quantity.
Ans: Summary: If both demand and supply rise, equilibrium quantity always rises, but the change in price depends on which increases more. - If demand and supply grow equally: Price stays the same, quantity increases. - If demand increases more than supply: Price and quantity both increase. - If supply increases more than demand: Price falls, quantity increases.

16. How are the equilibrium price and quantity affected when?
(a) Both demand and supply curves shift in the same direction?
(b) Demand and supply curves shift in opposite directions?

Ans: (a) If both demand and supply shift right (increase): Quantity increases. Price may increase, decrease, or stay the same, depending on which shift is bigger. (b) If demand and supply move in opposite directions: If demand rises and supply falls, price increases. If demand falls and supply rises, price decreases. Quantity depends on the size of the shifts.

17. In what respect do the supply and demand curves in the labor market differ from those in the goods market?
Ans: Summary: In goods markets buyers demand and firms supply; in labor markets, firms demand labor and households supply it. - In the goods market, consumers/households demand goods; firms supply them. - In the labor market, firms demand labor; households offer (supply) labor.

18. How is the optimal amount of labor determined in a perfectly competitive market?
Ans: Summary: Firms hire workers until the wage equals value of extra output from the last worker. - The firm will keep hiring workers as long as the wage (cost of an extra worker) is equal to the Marginal Revenue Product (MRP). - So, Wage = Marginal Revenue Product of labor (MRPL) - In perfect competition, Wage = Price × Marginal Product of Labor (P × MPL) - The demand for labor comes from the value of what each worker adds (VMPL). - The equilibrium happens where the labor demand and labor supply cross. At this point, we get the equilibrium wage and number of workers hired.

19. How is the wage rate determined in a perfectly competitive labor market?
Ans: Summary: Wage is set where labor demand meets labor supply, just like price in goods markets. - Demand for labor comes from firms’ need for workers (based on the value they add). - Supply of labor comes from people willing to work at different wages. - Equilibrium wage is set where these curves cross. - At this wage, the amount of labor supplied equals labor demanded. - The supply of labor can bend back if high wages make people prefer leisure instead.

20. Can you think of any commodity on which the price ceiling is imposed in India? What may be the consequence of price-ceiling?
Ans: Summary: In India, the government sets a price ceiling for items like kerosene, sugar, wheat, and rice to keep them affordable. This has several effects. - Excess demand: More people want the good than is available at the capped price. - Fixed quota: Each person gets a limited amount, which may not be enough. - Often lower quality: Rationed goods may be of lower quality or adulterated. - Black marketing: Some buyers pay more on the black market, causing shortages.

21. A shift in demand curve has a larger effect on price and smaller effect on quantity when the number of firms is fixed compared to the situation when free entry and exits is permitted. Explain.
Ans: Summary: When firm numbers are fixed, a demand shift mostly changes price. With free entry/exit, demand shifts change quantity more, and price barely changes. - Short run (fixed firms): Higher demand raises price a lot, quantity only a little; lower demand lowers price a lot, quantity only a little. - Long run (free entry/exit): Demand changes result in big changes in quantity but little change in price.

22. Suppose the demand and supply curve of commodity $X$ in a perfectly competitive market are given by:
qD =700 - p
qs = 500 + 3p for p ≥ 15
= 0 or 0 ≤ p <15
Assume that the market consists of identical firms. Identify the reason behind the market supply of commodity X being zero at any price less than Rs 15. What will be the equilibrium price for this commodity? At equilibrium, what quantity of X will be produced?

Ans: Summary: Supply is zero below Rs 15 because firms won’t produce at a price below minimum average variable cost (AVC). Equilibrium price is Rs 50, with 650 units produced. - No firm produces if price < Rs 15 because this is below AVC. - At equilibrium, set qD = qs: - 700 – p = 500 + 3p - 4p = 200 ⇒ p = 50 - So, equilibrium price is Rs 50. - Equilibrium quantity = 500 + 3×50 = 650 units.

23. Considering the same demand curve as in exercise 22, now let us understand for free entry and exit of the firms producing commodity X. Also assume the market consists of identical firms producing commodity X. Let the supply curve of a single firm be explained?
q*= 8+3p for p ≥ 20
= 0 for 0 ≤ p ≤ Rs 20
(a) What is the significance of p =20?
(b) At what price will the market for X be in equilibrium? State the reason for your answer.
(c) Calculate the equilibrium quantity and number of firms.

Ans: (a) p = 20 is the minimum of long-run average cost (LAC). No firm will produce below this price. (b) With free entry and exit, firms only stay when price is at least Rs 20 (LAC minimum). So, equilibrium price is Rs 20. (c) At p = 20: - Each firm supplies 8 + 3×20 = 68 units. - Total market quantity: qd = 700 – 20 = 680 units. - Number of firms: 680 ÷ 68 = 10.

24. Suppose the demand and supply curves of salt are given by:
(a) Find the equilibrium price and quantity.
(b) Now, suppose that the price of an input that used to produce salt has increased so, that the new supply curve is qs = 400 + 3p How does the equilibrium price and quantity change? Does the change conform to your expectation?
(a) Suppose the government has imposed at ax of Rs 3 per unit of sale on salt. How does it affect the equilibrium rice quantity?

Ans: (a) To find equilibrium: - Demand: qd = 1000 – p - Supply: qs = 700 + 2p - Set equal: 1000 – p = 700 + 2p - 300 = 3p ⇒ p = 100 - Quantity = 900 units (1000 – 100) (b) With higher input cost (supply shifts to qs = 400 + 2p): - 1000 – p = 400 + 2p - 600 = 3p ⇒ p = 200 - Quantity = 800 units - This matches expectations: Input cost rise makes supply less, price goes up, quantity goes down. (c) With Rs 3 tax per unit (supply shifts to qs = 700 + 2(p – 3)): - 1000 – p = 700 + 2(p – 3) - 1000 – p = 700 + 2p – 6 = 694 + 2p - 1000 – p = 694 + 2p - 306 = 3p ⇒ p = 102 - Quantity = 898 units (1000 – 102) Imposing tax slightly raises price and reduces quantity.

25. Suppose the market determined rent for apartments is too high for common people to afford. If the government comes forward to help those seeking apartments on rent by imposing control on rent, what impact will it have on the market for apartments?
Ans: Summary: When government controls rents with a price ceiling, rent becomes affordable for more, but there will be excess demand and possible black marketing. - Rent ceiling below equilibrium means more people can afford apartments. - At capped rents, demand is more than supply, causing excess demand. - Some landlords may rent out apartments at higher (illegal) prices, creating black market issues.

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Market Equilibrium Class 12: Key Points to Remember from Chapter 5

  • Market equilibrium happens where demand equals supply, setting the stable price and quantity.
  • If supply is more than demand, prices fall; if demand is more, prices rise.
  • Changes in consumer income and prices of related goods shift demand, affecting equilibrium.
  • With more competition or firm entry, only quantity changes a lot in the long run; price stays the same.
  • Real-life controls like rent ceilings or price caps create shortages and black markets.
  • Practice Market Equilibrium questions and answers Class 12 to prepare for NCERT exams.
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FAQs on NCERT Solutions For Class 12 Economics Chapter 5 Market Equilibrium - 2025-26

1. What are the main components of a Government Budget that I need to know for solving NCERT questions for Class 12 Economics Chapter 5?

As per the CBSE 2025-26 syllabus, the Government Budget has two primary components, which are essential for solving NCERT questions. You must understand how to classify items under each:

  • Revenue Budget: This includes all the revenue receipts and revenue expenditures of the government.
    • Revenue Receipts: These are receipts that neither create a liability nor reduce an asset. They are further divided into Tax Revenue (e.g., income tax, GST) and Non-Tax Revenue (e.g., interest, dividends).
    • Revenue Expenditure: This is an expense that neither creates an asset nor reduces a liability (e.g., salaries, pensions, subsidies).
  • Capital Budget: This includes all capital receipts and capital expenditures.
    • Capital Receipts: These receipts either create a liability (e.g., borrowings) or reduce an asset (e.g., disinvestment).
    • Capital Expenditure: This expenditure either creates a physical or financial asset (e.g., building roads, giving loans) or reduces a liability (e.g., loan repayment).

2. How do you correctly solve a numerical problem to find the Fiscal Deficit from a given set of budget data?

To solve for Fiscal Deficit in an NCERT problem, follow these steps:

  1. First, identify the government's Total Expenditure by adding Revenue Expenditure and Capital Expenditure.
  2. Next, identify the Total Receipts excluding borrowings. This is calculated by adding Revenue Receipts and Non-debt creating Capital Receipts (like recovery of loans and disinvestment proceeds).
  3. Finally, apply the formula: Fiscal Deficit = Total Expenditure – Total Receipts (excluding borrowings).

Remember, the Fiscal Deficit is equal to the total borrowing requirement of the government.

3. What is the correct method to distinguish between Revenue Expenditure and Capital Expenditure with examples, as required in CBSE exams?

The correct method is to check if the expenditure leads to the creation of an asset or reduction of a liability. Here’s how you can distinguish them for your answers:

  • Revenue Expenditure: This is a recurring expense for the normal functioning of the government. It does not create any asset or reduce any liability. For example, payment of salaries, pensions, and interest on debt.
  • Capital Expenditure: This is a non-recurring, long-term expense. It either creates a physical or financial asset or causes a reduction in liability. For example, construction of a dam (asset creation) or repayment of a loan (liability reduction).

4. How do the NCERT Solutions for Chapter 5 explain the primary objectives of a government budget?

The NCERT Solutions explain that the government budget is a crucial tool for achieving specific economic and social goals. The primary objectives, which are frequently asked in exams, are:

  • Allocation of Resources: The budget guides the allocation of the country's resources towards various sectors, balancing social welfare and economic profit.
  • Redistribution of Income and Wealth: Through progressive taxation and subsidies, the government aims to reduce the gap between the rich and the poor.
  • Economic Stability: The budget is used to control economic fluctuations like inflation or deflation through fiscal policy measures.
  • Management of Public Enterprises: The budget provides financial support and outlines policies for public sector undertakings.

5. What is the core difference between Revenue Deficit and Fiscal Deficit that helps in solving problems?

The core difference lies in what they indicate about the government's finances:

  • Revenue Deficit (Revenue Expenditure > Revenue Receipts) shows the shortfall in the government's current receipts to meet its current running expenses. It signals that the government is dissaving.
  • Fiscal Deficit (Total Expenditure > Total Receipts excluding borrowings) shows the total borrowing requirement of the government from all sources to meet its expenditure. It represents the overall deficit, including both revenue and capital accounts.

In short, a revenue deficit is about the shortfall in day-to-day finances, while a fiscal deficit is about the overall borrowing needed for the year.

6. How should one classify items like 'loans to states' and 'interest payments' into the correct budget accounts for NCERT questions?

To correctly classify these items, you must apply the asset/liability rule:

  • Loans to States: When the central government gives a loan to a state, it creates a financial asset for the central government (as it expects repayment with interest). Therefore, 'loans to states' is classified as a Capital Expenditure.
  • Interest Payments: When the government pays interest on its past debt, it is a routine, recurring expense. This payment does not create any new asset or reduce any liability (the principal loan amount remains unchanged). Thus, 'interest payments' are classified as Revenue Expenditure.

7. Why is 'borrowing' by the government treated as a capital receipt and not a revenue receipt?

Borrowing is treated as a Capital Receipt because it creates a future liability for the government. The government is obligated to repay the principal amount along with interest in the future. According to the definition, any receipt that creates a liability is a capital receipt. In contrast, a Revenue Receipt, like tax revenue, does not create any corresponding liability for the government to repay.

8. If the Revenue Deficit is zero, does it automatically mean the Fiscal Deficit is also zero? Explain why or why not.

No, a zero Revenue Deficit does not automatically mean the Fiscal Deficit is also zero. Here's why:

  • A zero Revenue Deficit simply means that the government's revenue receipts are sufficient to cover its revenue expenditure. The government is not borrowing to finance its day-to-day consumption expenses.
  • However, the government may still borrow money to finance its Capital Expenditure, such as building highways, ports, or schools.
  • Since Fiscal Deficit includes borrowings for both revenue and capital purposes, a positive capital expenditure financed through borrowing will result in a positive Fiscal Deficit, even if the Revenue Deficit is zero.

9. How does a government budget act as a tool for redistributing income, and what examples are relevant for answering NCERT questions on this topic?

The government budget redistributes income by influencing the disposable income of individuals and providing essential services. For NCERT answers, you can use these examples:

  • Taxation Policy: The government imposes higher taxes on higher income groups (progressive taxation) and luxury goods. This reduces their disposable income.
  • Subsidies and Transfers: The revenue collected is used to provide subsidies on essential goods like food grains and cooking gas for lower-income groups. It also funds social security schemes like pensions and unemployment allowances.
  • Public Distribution System (PDS): The government provides essential food items at subsidised rates to the poor, which increases their real income.

This 'taking from the rich and giving to the poor' mechanism helps reduce income inequality.

10. What is the true significance of the Primary Deficit, and how does its calculation differ from the Fiscal Deficit?

The Primary Deficit reveals the true extent of the current government's fiscal indiscipline. Its significance lies in what it excludes:

  • Significance: The Primary Deficit shows the borrowing requirement of the government to meet its expenses, excluding interest payments on past debts. A high primary deficit indicates that the current government's policies are causing fresh debt, whereas a low or zero primary deficit suggests that borrowings are mainly for paying off old interest obligations.
  • Calculation: It is calculated by subtracting interest payments from the fiscal deficit. The formula is: Primary Deficit = Fiscal Deficit – Interest Payments.