Chapter 7 · Class 11 Economics

Market Forms (Microeconomics) — Important Questions

54 questions With answers CBSE format

SUMMARY: The chapter "Market Forms" in Class 11 Economics explores different types of market structures and their characteristics in microeconomics.
KEY TOPICS: Perfect competition, monopoly, monopolistic competition, oligopoly, market equilibrium, price determination, barriers to entry, product differentiation, market power, price discrimination.

Previous chapter Market Equilibrium (Microeconomics) Next chapter Measures of Central Tendency (Statistics for Economics)

Multiple Choice Questions (MCQs) 10 questions

Q1 1 Mark

Under perfect competition, the demand curve faced by an individual firm is:

ADownward sloping

BUpward sloping

CPerfectly elastic (horizontal)

DPerfectly inelastic (vertical)

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Correct answer: Option 3 — Perfectly elastic (horizontal)

Q2 1 Mark

Which of the following is NOT a characteristic of monopolistic competition?

ALarge number of sellers

BProduct differentiation

CHomogeneous products

DFree entry and exit

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Correct answer: Option 3 — Homogeneous products

Q3 1 Mark

In a monopoly market, the firm is a price maker because:

AThere are many buyers in the market

BThere is only one seller with no close substitutes

CProducts are highly differentiated

DThere are low barriers to entry

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Correct answer: Option 2 — There is only one seller with no close substitutes

Q4 1 Mark

Price discrimination by a monopolist refers to:

ACharging the same price to all consumers

BCharging different prices for the same product from different consumers

CReducing price to eliminate competition

DSetting price equal to marginal cost

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Correct answer: Option 2 — Charging different prices for the same product from different consumers

Q5 1 Mark

In which market form does a firm have the highest degree of market power?

APerfect competition

BMonopolistic competition

COligopoly

DMonopoly

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Correct answer: Option 4 — Monopoly

Q6 1 Mark

Under perfect competition, in the long run, firms earn:

ASupernormal profits due to product differentiation

BOnly normal profits due to free entry and exit

CLosses due to intense price competition

DSupernormal profits due to barriers to entry

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Correct answer: Option 2 — Only normal profits due to free entry and exit

Q7 1 Mark

Which of the following best describes an oligopoly market structure?

AA single seller dominating the entire market

BMany sellers offering differentiated products

CA few large sellers who are mutually interdependent in pricing decisions

DMany sellers offering homogeneous products with free entry

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Correct answer: Option 3 — A few large sellers who are mutually interdependent in pricing decisions

Q8 1 Mark

Barriers to entry in a monopoly market can arise due to which of the following?

ALarge number of competing firms

BProduct differentiation through advertising

CLegal restrictions such as patents and licenses

DPerfectly elastic demand curve

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Correct answer: Option 3 — Legal restrictions such as patents and licenses

Q9 1 Mark

A firm in monopolistic competition faces a demand curve that is:

APerfectly elastic, as in perfect competition

BPerfectly inelastic, as in pure monopoly

CDownward sloping but relatively more elastic than monopoly

DUpward sloping due to brand loyalty

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Correct answer: Option 3 — Downward sloping but relatively more elastic than monopoly

Q10 1 Mark

In market equilibrium under perfect competition, price is determined by:

AThe dominant firm's pricing strategy

BGovernment regulation and price controls

CThe intersection of market demand and market supply

DThe marginal revenue of individual firms

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Correct answer: Option 3 — The intersection of market demand and market supply

Short Answer Questions 10 questions

Q11 3 Marks

What is meant by perfect competition? State any two essential conditions for a perfectly competitive market.

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Perfect competition is a market structure where there are a large number of buyers and sellers dealing in a homogeneous product, with no single buyer or seller able to influence the market price. Two essential conditions are: (1) Large number of buyers and sellers, so each is a price taker. (2) Homogeneous or identical products sold by all firms in the market.

Q12 3 Marks

Define monopoly. How does a monopolist differ from a firm in perfect competition in terms of price determination?

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Monopoly is a market structure where there is a single seller of a product with no close substitutes, giving the seller complete control over the market price. Unlike a perfectly competitive firm which is a price taker, a monopolist is a price maker who can set the price by controlling the quantity supplied in the market.

Q13 3 Marks

What is product differentiation? How does it play a role in monopolistic competition?

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Product differentiation refers to the practice of making a product appear distinct from competing products through differences in quality, design, brand name, or packaging. In monopolistic competition, firms use product differentiation to attract customers and gain some degree of market power, allowing them to charge a slightly higher price than competitors despite selling similar products.

Q14 3 Marks

Explain the concept of 'price discrimination' as practised under monopoly.

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Price discrimination occurs when a monopolist charges different prices from different consumers for the same product or service, not based on cost differences. For example, a doctor may charge higher fees from rich patients and lower fees from poor patients. This is possible only when the monopolist can separate markets and prevent resale between them.

Q15 3 Marks

What are barriers to entry? Why are they significant in a monopoly market?

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Barriers to entry are obstacles that prevent new firms from entering a market, such as patents, high startup costs, government regulations, or exclusive control over raw materials. In a monopoly, these barriers are crucial because they protect the single seller from competition, allowing the monopolist to maintain market power and earn supernormal profits in the long run.

Q16 3 Marks

Distinguish between oligopoly and monopolistic competition on the basis of the number of sellers and interdependence among firms.

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In oligopoly, there are only a few large sellers who are highly interdependent, meaning the pricing or output decision of one firm directly affects and influences the decisions of rival firms. In monopolistic competition, there are many sellers with little interdependence, as each firm has a small market share and its decisions do not significantly affect competitors.

Q17 3 Marks

How is market equilibrium determined under perfect competition?

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Under perfect competition, market equilibrium is determined by the interaction of market demand and market supply. The equilibrium price, also called the market-clearing price, is established at the point where the quantity demanded equals the quantity supplied. At this price, there is neither excess demand nor excess supply in the market.

Q18 3 Marks

Why is the demand curve facing a perfectly competitive firm perfectly elastic, while the demand curve facing a monopolist is downward sloping?

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A perfectly competitive firm is a price taker and must accept the market-determined price; if it raises its price even slightly, it loses all customers to rivals selling identical products, making its demand curve perfectly elastic (horizontal). A monopolist, being the sole seller with no close substitutes, faces the entire market demand curve, which is downward sloping, meaning it must lower the price to sell more units.

Q19 3 Marks

Explain why firms in monopolistic competition earn only normal profits in the long run despite product differentiation.

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Although product differentiation gives firms some market power in the short run, the relatively free entry and exit of firms in monopolistic competition erodes supernormal profits over time. When existing firms earn supernormal profits, new firms enter the market with similar differentiated products, increasing competition and reducing each firm's demand and profits until only normal profits remain in the long run.

Q20 3 Marks

What is market power? How does the degree of market power differ between a monopoly and an oligopoly?

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Market power refers to the ability of a firm to influence the price of its product in the market rather than accepting the price determined by market forces. A monopolist has the highest degree of market power as it is the sole seller with no competition. In an oligopoly, market power is shared among a few large firms, and each firm's power is constrained by the strategic reactions and decisions of its rivals.

Long Answer Questions 6 questions

Q21 6 Marks

Compare perfect competition and monopoly market structures with the help of a table on five features.

Q22 6 Marks

Differentiate between monopoly and monopolistic competition in tabular form on five features.

Q23 6 Marks

Compare monopolistic competition and oligopoly with the help of a table.

Q24 6 Marks

Explain the main characteristics of perfect competition. How does a perfectly competitive firm become a price taker rather than a price maker?

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Perfect competition is a market structure characterized by a large number of buyers and sellers, homogeneous (identical) products, free entry and exit of firms, perfect knowledge of market conditions, and no transportation costs. Because there are so many sellers offering identical products, no single firm has the power to influence the market price. The market price is determined by the overall forces of demand and supply in the industry. Each individual firm must accept this price as given — if it tries to charge even slightly above the market price, all its customers will shift to other sellers offering the same product at the lower price. This is why a perfectly competitive firm is called a price taker. The demand curve faced by an individual firm in perfect competition is perfectly elastic (horizontal) at the prevailing market price, meaning the firm can sell any quantity at that price but nothing above it. Thus, the firm's only decision is how much to produce, not what price to charge.

Q25 6 Marks

What is monopoly? Discuss the main sources of monopoly power and explain how barriers to entry help a monopolist maintain its position in the market.

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Monopoly is a market structure in which there is only a single seller of a product that has no close substitutes. The monopolist is the sole supplier and therefore has significant control over the price of the product. The main sources of monopoly power include: (1) Legal barriers such as patents, copyrights, and government licenses that prevent other firms from entering the market; (2) Control over key raw materials or resources essential for production; (3) Economies of scale, where the cost of production falls so much as output increases that a single large firm can supply the entire market more cheaply than multiple smaller firms — this is called a natural monopoly; (4) Government-granted monopolies where the state itself gives exclusive rights to a firm. Barriers to entry are crucial for maintaining monopoly power because they prevent new competitors from entering the market even when the monopolist is earning supernormal profits. Without these barriers, new firms would be attracted by high profits, increase supply, and eventually drive down prices and profits. Thus, barriers to entry ensure that the monopolist can sustain its market power and earn above-normal profits in the long run.

Q26 6 Marks

Distinguish between perfect competition and monopolistic competition. How does product differentiation play a key role in monopolistic competition?

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Perfect competition and monopolistic competition are both market structures with many sellers, but they differ significantly. In perfect competition, products are homogeneous (identical), firms are price takers, and there is no scope for advertising or branding. In monopolistic competition, products are differentiated — each firm sells a product that is slightly different from competitors' products in terms of quality, brand, packaging, or after-sales service. This differentiation gives each firm some degree of market power, making it a price maker to a limited extent. Product differentiation is the defining feature of monopolistic competition. It can be real (actual differences in quality or features) or perceived (differences created through advertising and branding). Because of differentiation, each firm faces a downward-sloping demand curve rather than a perfectly elastic one. Consumers develop brand loyalty, and firms compete not just on price but also on product quality, design, and promotion. However, since entry and exit are relatively free, firms in monopolistic competition earn only normal profits in the long run, as new entrants erode any supernormal profits by offering similar differentiated products.

Assertion–Reason Questions 8 questions

Q27 1 Mark

Assertion (A): In perfect competition, a single firm has no control over the price of the product.

Reason (R): In perfect competition, there are a large number of buyers and sellers dealing in homogeneous products, so each firm is a price taker.

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Correct answer: Option 1 — Both A and R are true, and R is the correct explanation of A.

Q28 1 Mark

Assertion (A): A monopolist always earns supernormal profits in the long run.

Reason (R): In monopoly, high barriers to entry prevent new firms from entering the market and competing away the profits.

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Correct answer: Option 2 — Both A and R are true, but R is not the correct explanation of A.

Q29 1 Mark

Assertion (A): Under monopolistic competition, firms produce differentiated products.

Reason (R): Product differentiation allows firms under monopolistic competition to have some degree of market power and face a downward sloping demand curve.

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Correct answer: Option 1 — Both A and R are true, and R is the correct explanation of A.

Q30 1 Mark

Assertion (A): In perfect competition, firms earn only normal profits in the long run.

Reason (R): In the long run under perfect competition, free entry and exit of firms eliminates supernormal profits and losses.

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Correct answer: Option 1 — Both A and R are true, and R is the correct explanation of A.

Q31 1 Mark

Assertion (A): A monopolist can fix both the price and quantity of output simultaneously.

Reason (R): A monopolist faces a downward sloping demand curve and can only choose either price or quantity, not both independently.

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Correct answer: Option 4 — A is false, but R is true.

Q32 1 Mark

Assertion (A): Price discrimination is commonly practised under perfect competition.

Reason (R): Price discrimination requires market power, which is absent in perfect competition as firms are price takers.

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Correct answer: Option 4 — A is false, but R is true.

Q33 1 Mark

Assertion (A): Under oligopoly, the actions of one firm significantly affect the other firms in the market.

Reason (R): Oligopoly is characterised by a few large firms with interdependence, where each firm's pricing and output decisions impact rivals.

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Correct answer: Option 1 — Both A and R are true, and R is the correct explanation of A.

Q34 1 Mark

Assertion (A): In monopolistic competition, firms earn supernormal profits in the long run.

Reason (R): Under monopolistic competition, free entry of new firms in the long run competes away supernormal profits, leaving firms with only normal profits.

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Correct answer: Option 3 — A is true, but R is false.

Statement-Based Questions 8 questions

Q35 1 Mark

Statement 1: In perfect competition, a single firm has the power to influence the market price of the product.

Statement 2: In perfect competition, there are a large number of buyers and sellers dealing in a homogeneous product.

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Correct answer: Option 3 — Only Statement 2 is true.

Q36 1 Mark

Statement 1: A monopolist is a price maker who can set the price of the product in the market.

Statement 2: Under monopoly, there are no barriers to entry for new firms.

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Correct answer: Option 2 — Only Statement 1 is true.

Q37 1 Mark

Statement 1: Product differentiation is a key feature of monopolistic competition.

Statement 2: Under monopolistic competition, firms have no control over price due to the presence of many competitors.

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Correct answer: Option 2 — Only Statement 1 is true.

Q38 1 Mark

Statement 1: In oligopoly, there are only a few large sellers who are interdependent in their pricing decisions.

Statement 2: Oligopoly is characterised by free entry and exit of firms in the long run.

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Correct answer: Option 2 — Only Statement 1 is true.

Q39 1 Mark

Statement 1: Price discrimination refers to charging different prices from different consumers for the same product.

Statement 2: Price discrimination is commonly practised under perfect competition.

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Correct answer: Option 2 — Only Statement 1 is true.

Q40 1 Mark

Statement 1: Under perfect competition, the demand curve faced by an individual firm is perfectly elastic.

Statement 2: Under monopoly, the demand curve faced by the firm is also perfectly elastic.

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Correct answer: Option 2 — Only Statement 1 is true.

Q41 1 Mark

Statement 1: In monopolistic competition, firms earn only normal profits in the long run due to free entry and exit.

Statement 2: In monopolistic competition, firms can earn supernormal profits in the long run because of product differentiation.

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Correct answer: Option 2 — Only Statement 1 is true.

Q42 1 Mark

Statement 1: High barriers to entry are a characteristic feature of monopoly markets.

Statement 2: Barriers to entry in monopoly can include patents, licences, and control over key raw materials.

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Correct answer: Option 1 — Both statements are true.

Case Study / Passage Questions 4 questions

Q43 4 Marks

Perfect competition is a market structure characterized by a large number of buyers and sellers, homogeneous products, free entry and exit, and perfect knowledge of market conditions. In such a market, no single buyer or seller can influence the price. Each firm is a price taker, meaning it accepts the market price as given. The demand curve faced by an individual firm is perfectly elastic (horizontal) at the prevailing market price. The market price is determined by the interaction of market demand and market supply. Firms in perfect competition earn only normal profits in the long run because any supernormal profit attracts new entrants, which increases supply and drives the price down until only normal profits remain.

In a perfectly competitive market, the demand curve faced by an individual firm is:

ADownward sloping

BUpward sloping

CPerfectly elastic (horizontal)

DPerfectly inelastic (vertical)
Which of the following is NOT a feature of perfect competition?

AHomogeneous products

BLarge number of buyers and sellers

CProduct differentiation

DFree entry and exit
Why do firms in perfect competition earn only normal profits in the long run?
How is the market price determined in a perfectly competitive market?

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1. Option 3 — Perfectly elastic (horizontal)

2. Option 3 — Product differentiation

3. In perfect competition, if firms earn supernormal profits in the short run, new firms are attracted into the market due to free entry. This increases market supply, which lowers the market price. This process continues until the price falls to the level where firms earn only normal profits, i.e., where price equals average cost.

4. In a perfectly competitive market, the price is determined by the interaction of market demand and market supply. The equilibrium price is the price at which the quantity demanded equals the quantity supplied. Individual firms have no control over price and act as price takers.

Q44 4 Marks

Monopoly is a market structure where there is a single seller of a product with no close substitutes. The monopolist has significant market power and is a price maker, meaning it can set the price. Barriers to entry such as legal restrictions, patents, control over key resources, and high startup costs prevent new firms from entering the market. Unlike perfect competition, the demand curve faced by a monopolist is downward sloping, which means the monopolist must lower the price to sell more units. The monopolist maximizes profit by producing the quantity where marginal revenue equals marginal cost (MR = MC). Monopolists can earn supernormal profits even in the long run due to barriers to entry.

A monopolist is described as a 'price maker' because:

AIt accepts the market price as given

BIt has the power to set the price of its product

CIt competes with many sellers

DIt sells homogeneous products
Which of the following is an example of a barrier to entry in a monopoly?

AHomogeneous products

BPerfect knowledge

CPatents and legal restrictions

DLarge number of sellers
What is the profit-maximizing condition for a monopolist?
Why can a monopolist earn supernormal profits even in the long run?

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1. Option 2 — It has the power to set the price of its product

2. Option 3 — Patents and legal restrictions

3. A monopolist maximizes profit by producing the level of output where Marginal Revenue (MR) equals Marginal Cost (MC). At this output level, the price is determined from the demand curve. Since the monopolist faces a downward-sloping demand curve, MR is always less than price (AR).

4. A monopolist can earn supernormal profits in the long run because high barriers to entry prevent new firms from entering the market. These barriers include patents, control over key resources, government regulations, and high startup costs, which protect the monopolist's market position and allow it to maintain above-normal profits.

Q45 4 Marks

Monopolistic competition is a market structure that combines features of both perfect competition and monopoly. There are many sellers, but each sells a differentiated product. Product differentiation can be based on brand name, quality, design, packaging, or after-sale services. Because of differentiation, each firm has some degree of market power and faces a downward-sloping demand curve. However, since there are many close substitutes, this market power is limited. Entry and exit are relatively free. In the short run, firms may earn supernormal profits or incur losses, but in the long run, only normal profits are earned due to free entry and exit. Advertising and selling costs play a significant role in monopolistic competition.

Which of the following best describes monopolistic competition?

ASingle seller with no close substitutes

BFew sellers with interdependent pricing

CMany sellers with differentiated products

DMany sellers with identical products
Product differentiation in monopolistic competition can be based on:

AIdentical quality and packaging

BBrand name, design, and after-sale services

CHomogeneous raw materials only

DGovernment-fixed prices
How does monopolistic competition differ from perfect competition?
What happens to supernormal profits earned by firms in monopolistic competition in the long run?

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1. Option 3 — Many sellers with differentiated products

2. Option 2 — Brand name, design, and after-sale services

3. In monopolistic competition, products are differentiated (not homogeneous), each firm has some market power, and the demand curve is downward sloping. In perfect competition, products are identical, firms are price takers, and the demand curve is perfectly elastic. Both have many sellers and free entry/exit, but monopolistic competition involves advertising and selling costs which are absent in perfect competition.

4. In the long run, supernormal profits in monopolistic competition are eliminated because free entry attracts new firms into the market. New entrants offer close substitutes, which reduces the demand for existing firms' products and lowers prices. This process continues until firms earn only normal profits in the long run.

Q46 4 Marks

Oligopoly is a market structure dominated by a few large sellers. The products sold may be homogeneous (pure oligopoly, e.g., steel, cement) or differentiated (differentiated oligopoly, e.g., automobiles, smartphones). A key feature of oligopoly is mutual interdependence — each firm's pricing and output decisions are influenced by the actions and reactions of rival firms. This interdependence makes it difficult to predict the behavior of oligopolistic firms. Barriers to entry such as economies of scale, high capital requirements, and patent rights restrict new firms from entering. Oligopolistic markets often exhibit price rigidity, where firms avoid changing prices for fear of triggering a price war. Collusion among firms (e.g., cartels) may also occur to maximize joint profits.

Which of the following is the most distinctive feature of oligopoly?

ALarge number of sellers

BMutual interdependence among firms

CHomogeneous products only

DPerfect knowledge of market
Price rigidity in oligopoly means:

APrices change frequently due to competition

BFirms set prices equal to marginal cost

CFirms avoid changing prices to prevent price wars

DGovernment fixes the price for all firms
Explain the concept of mutual interdependence in oligopoly with an example.
What is a cartel, and how does it function in an oligopolistic market?

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1. Option 2 — Mutual interdependence among firms

2. Option 3 — Firms avoid changing prices to prevent price wars

3. Mutual interdependence in oligopoly means that the decisions of one firm regarding price or output directly affect and are affected by the decisions of rival firms. For example, if one automobile company reduces its car prices, other automobile companies must also consider reducing their prices or offering better features to retain customers. Each firm watches its rivals closely before making any decision.

4. A cartel is a formal agreement or collusion among oligopolistic firms to coordinate their pricing and output decisions in order to maximize joint profits. Member firms agree to set a common price (usually higher than the competitive price) and divide the market among themselves. OPEC (Organization of Petroleum Exporting Countries) is a well-known example of a cartel. Cartels reduce competition and can harm consumers through higher prices.

Table-Based Questions 4 questions

Q47

Observe the following table showing characteristics of different market forms and answer the questions below:

Feature	Perfect Competition	Monopoly	Monopolistic Competition	Oligopoly
Number of Sellers	Very Large	One	Many	Few
Product Type	Homogeneous	Unique	Differentiated	Homogeneous/Differentiated
Entry Barriers	None	Very High	Low	High
Price Control	None (Price Taker)	Full	Some	Significant
Examples	Agricultural Markets	Railways (Public)	Soap, Toothpaste	Steel, Automobiles

In which market form does a firm have NO control over price and acts as a price taker?
Which market form is characterized by a few sellers selling either homogeneous or differentiated products with high entry barriers?
Distinguish between product differentiation in monopolistic competition and the product nature in perfect competition. Why does product differentiation give firms some degree of market power?

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Q48 6 Marks

The following table shows the price and output data for a firm under perfect competition. Observe the data and answer:

Output (Units)	Market Price (₹)	Total Revenue (₹)	Marginal Revenue (₹)
1	50	50	50
2	50	100	50
3	50	150	50
4	50	200	50
5	50	250	50

Q49 6 Marks

The following table shows the demand schedule faced by a monopolist. Study the data and answer the questions:

Output (Units)	Price (₹)	Total Revenue (₹)	Marginal Revenue (₹)
1	100	100	100
2	90	180	80
3	80	240	60
4	70	280	40
5	60	300	20
6	50	300	0

Q50 6 Marks

The table below compares the equilibrium conditions across different market forms. Analyse the data and answer:

Market Form	Price vs MC at Equilibrium	AR vs AC at Long-Run Equilibrium	Profit Condition
Perfect Competition	P = MC	AR = AC	Normal Profit Only
Monopoly	P > MC	AR > AC (possible)	Supernormal Profit Possible
Monopolistic Competition	P > MC	AR = AC	Normal Profit Only
Oligopoly	P > MC	AR ≥ AC	Supernormal Profit Possible

Picture-Based Questions 4 questions

Q51 8 Marks

Based on the given graph, answer the following:

In perfect competition, the demand curve faced by an individual firm is:

ADownward sloping

BUpward sloping

CPerfectly elastic (horizontal)

DPerfectly inelastic (vertical)
At the equilibrium point E shown in the graph, which condition is satisfied?

APrice > Marginal Cost

BPrice = Marginal Cost

CPrice < Marginal Cost

DMarginal Cost = Average Fixed Cost
What does the graph indicate about the firm's profit or loss at equilibrium point E, where Price equals the minimum of ATC?
In the long run under perfect competition, why do supernormal profits disappear?
At the profit-maximising output Q*=4 in the graph, which condition is met?

AMR = AR

BMC = AC

CMR = MC

DAR = AC
In the graph, the monopolist charges a price P*=50 while AC at Q*=4 is 27. What does this indicate?

AThe firm is making a loss

BThe firm is earning normal profit only

CThe firm is earning supernormal (abnormal) profit

DThe firm is at break-even point
Why does the Marginal Revenue (MR) curve lie below the Average Revenue (AR) curve in a monopoly market?
Can a monopolist earn supernormal profits in the long run? Give a reason.
In monopolistic competition, the demand curve faced by a firm is:

APerfectly elastic

BPerfectly inelastic

CDownward sloping but relatively elastic

DUpward sloping
From the graph, at Q*=3, Price = 55 and AC = 30. What is the supernormal profit per unit earned by the firm?

ARs. 10

BRs. 25

CRs. 30

DRs. 55
What will happen to the supernormal profits shown in this graph in the long run under monopolistic competition?
How does product differentiation give a firm in monopolistic competition some degree of market power?

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1. Option 3 — Perfectly elastic (horizontal)

2. Option 2 — Price = Marginal Cost

3. At equilibrium point E, Price equals the minimum of ATC (P = ATC), which means the firm earns normal profit (zero economic profit). There is neither supernormal profit nor loss.

4. In the long run, there are no barriers to entry in perfect competition. Supernormal profits attract new firms into the industry, increasing supply, which drives the price down until only normal profits remain (P = minimum ATC).

5. Option 3 — MR = MC

6. Option 3 — The firm is earning supernormal (abnormal) profit

7. In monopoly, the firm faces a downward-sloping demand curve (AR curve). To sell an additional unit, the monopolist must lower the price for all units sold, not just the last one. Therefore, the revenue gained from the extra unit (MR) is less than the price charged (AR). This is why MR lies below AR throughout.

8. Yes, a monopolist can earn supernormal profits even in the long run. This is because high barriers to entry (such as legal restrictions, patents, control over key resources, or economies of scale) prevent new firms from entering the market and competing away the profits. Unlike perfect competition, there is no mechanism to erode monopoly profits in the long run.

9. Option 3 — Downward sloping but relatively elastic

10. Option 2 — Rs. 25

11. In the long run, supernormal profits attract new firms into the market (since entry barriers are low in monopolistic competition). As more firms enter, the demand for each existing firm's product decreases and becomes more elastic. This continues until each firm earns only normal profit (Price = AC), and supernormal profits are eliminated.

12. Product differentiation means each firm sells a product that is slightly different from its rivals in terms of quality, branding, packaging, or features. Because consumers perceive these differences, they may prefer one brand over another and are willing to pay a slightly higher price for it. This gives the firm some control over its price (market power), unlike perfect competition where all products are identical and firms are pure price takers.

Q52 4 Marks

Based on the given diagram, answer the following:

Which of the following is NOT a feature of perfect competition as shown in the diagram?

AHomogeneous product

BFree entry and exit

CProduct differentiation

DMany sellers
According to the diagram, which market form is characterised by a single seller with no close substitutes and high barriers to entry?

AOligopoly

BMonopolistic Competition

CPerfect Competition

DMonopoly
Explain the concept of 'interdependence' shown as a feature of oligopoly in the diagram.
How does monopolistic competition differ from perfect competition in terms of product characteristics?
Which of the following is a necessary condition for price discrimination to be practised by a monopolist, as shown in the diagram?

AHomogeneous product sold in all markets

BMarkets must be separable with no possibility of resale

CSame price elasticity of demand in all markets

DFree entry of new firms into the market
According to the diagram, in third-degree price discrimination, the monopolist charges a higher price in the market with:

AMore elastic demand

BLess elastic (inelastic) demand

CPerfectly elastic demand

DZero elasticity of demand
Give one real-life example of third-degree price discrimination and explain why it qualifies as price discrimination.
Why is price discrimination only possible under monopoly and not under perfect competition?

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1. Option 3 — Product differentiation

2. Option 4 — Monopoly

3. Interdependence in oligopoly means that each firm's pricing and output decisions are influenced by the decisions of rival firms. Because there are only a few large sellers, any action by one firm (such as a price cut) will have a noticeable impact on others, who will then react. This mutual interdependence makes oligopoly unique among market forms.

4. In perfect competition, all firms sell a homogeneous (identical) product, so buyers have no preference for one seller over another. In monopolistic competition, firms sell differentiated products — products that are similar but not identical (e.g., different brands of soap). This differentiation gives each firm some degree of market power to set prices above marginal cost.

5. Option 2 — Markets must be separable with no possibility of resale

6. Option 2 — Less elastic (inelastic) demand

7. A real-life example is railway or cinema ticket pricing where students or senior citizens are charged lower prices than regular adults for the same service. This qualifies as price discrimination because the same service is being provided at different prices to different consumer groups (market segments), based on their different price elasticities of demand — students typically have more elastic demand (limited income) while regular adults have less elastic demand.

8. Price discrimination requires market power — the ability to control price. In perfect competition, there are many sellers selling identical products, and each firm is a price taker. If one firm tried to charge a higher price to any buyer, that buyer would simply purchase from another seller at the market price. Therefore, no individual firm has the power to charge different prices. A monopolist, being the sole seller with no close substitutes, has the market power needed to separate buyers and charge different prices.

Q53 4 Marks

Based on the given graph showing price and quantity relationship in a perfectly competitive market, answer the following:

In a perfectly competitive market, why is the firm's demand curve (AR) a horizontal straight line?

AThe firm has market power to set prices

BThe firm is a price taker and must accept the market price

CThe firm produces differentiated products

DThe firm faces a downward sloping demand curve
At equilibrium point E in the graph, which condition is satisfied?

AAR > MC

BMC > MR

CMC = MR = AR = Price

DATC > AR
What does the point where ATC is at its minimum and equals AR (Price) indicate about the firm's profit?
In the long run under perfect competition, what happens to economic (supernormal) profits?

AThey increase due to higher demand

BThey are eliminated due to free entry of new firms

CThey remain constant as firms are price takers

DThey decrease only if the government intervenes

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1. Option 2 — The firm is a price taker and must accept the market price

2. Option 3 — MC = MR = AR = Price

3. When ATC equals AR (Price) at its minimum, the firm earns normal profit (zero economic profit). Total Revenue equals Total Cost, meaning the firm just covers all its costs including opportunity cost.

4. Option 2 — They are eliminated due to free entry of new firms

Q54 4 Marks

Based on the given flowchart showing the classification of market forms, answer the following:

According to the flowchart, which market form is characterised by a single seller with no close substitutes and high barriers to entry?

APerfect Competition

BMonopolistic Competition

CMonopoly

DOligopoly
How does monopolistic competition differ from perfect competition as shown in the flowchart?
Which of the following is NOT a feature of oligopoly as indicated in the flowchart?

AFew sellers dominate the market

BProducts can be homogeneous or differentiated

CLarge number of buyers and sellers

DMutual interdependence among firms
Give one real-world example each for monopoly and oligopoly from the Indian economy.

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1. Option 3 — Monopoly

2. Monopolistic competition differs from perfect competition in that it involves product differentiation (products are similar but not identical), whereas perfect competition has homogeneous (identical) products. Both have many sellers and relatively free entry and exit.

3. Option 3 — Large number of buyers and sellers

4. Monopoly example: Indian Railways (sole provider of rail transport services in India). Oligopoly example: The telecom sector in India (dominated by a few firms like Jio, Airtel, and Vi).

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