Class 9 Social Science Part 1 Chapter 9 MCQs – The Price Puzzle: What Drives the Market – explore why mango prices fall during the season and hotel rooms cost more when demand rises. The Price Puzzle connects these familiar changes with demand, supply and equilibrium. Across 30 questions, you will compare substitutes and complements, calculate shortages, surpluses and examine influences beyond a product’s price. Government regulation, shared public services and sustainability also feature in the practice. Read the explanations carefully when a question assumes that other factors remain unchanged. This helps you separate a general economic relationship from the changing conditions of a real market.
Class 9 Social Science Part 1 Chapter 9 MCQs Set 1
Q1. Which situation represents demand in economics?
[A]. A buyer is willing and able to buy a notebook at its stated price
[B]. A buyer admires a notebook but cannot afford it
[C]. A shopkeeper wishes to sell notebooks without any buyers
[D]. A factory produces notebooks that nobody wants
Q2. According to the law of demand, what usually happens when a product’s price falls, with other factors unchanged?
[A]. Its quantity demanded increases
[B]. Its supply must disappear
[C]. Its quantity demanded decreases
[D]. Every buyer’s income automatically increases
Q3. At ₹100 per kilogram, three consumers demand 2 kg, 4 kg and 6 kg of mangoes. What is their total market demand at that price?
[A]. ₹1,200
[B]. 24 kg
[C]. 12 kg
[D]. 6 kg
Q4. Coffee becomes more expensive while tea’s price remains unchanged. Why might demand for tea rise?
[A]. A rise in coffee prices directly increases everyone’s income
[B]. Tea and coffee must always be consumed together
[C]. Tea production must stop whenever coffee becomes expensive
[D]. Tea can act as a substitute for coffee
Q5. Which pair most clearly consists of complementary goods?
[A]. A printer and its compatible ink cartridges
[B]. Two alternative brands of notebooks
[C]. An air cooler and an air conditioner used as alternatives
[D]. Tea and coffee
Class 9 Social Science Part 1 Chapter 9 MCQs Set 2
Q6. Which statement about income and demand is most accurate?
[A]. Income never affects buying decisions
[B]. Higher income can increase purchases, but the effect depends on the product and consumer
[C]. Demand depends only on price and never on purchasing ability
[D]. Higher income always increases demand for every product equally
Q7. A student continues buying mangoes despite cheaper oranges being available. Which demand factor does this illustrate?
[A]. A compulsory price ceiling
[B]. A change in production technology
[C]. Taste and preference
[D]. An increase in the number of sellers
Q8. Why may demand for woollen jackets rise in Delhi during winter even if their prices remain unchanged?
[A]. Seasonal needs influence demand
[B]. The law of supply prevents summer sales
[C]. Winter automatically doubles every household’s income
[D]. All other clothing becomes a complementary good
Q9. Many families postpone buying a television because they expect a discount next month. What is the likely immediate effect?
[A]. The number of televisions already manufactured becomes zero
[B]. Televisions cease to be economic goods
[C]. Present demand for televisions falls
[D]. Present demand must rise sharply
Q10. The first mango gives a person more additional satisfaction than the fourth. Which principle does this illustrate?
[A]. Diminishing marginal utility
[B]. A legal price floor
[C]. Increasing market supply
[D]. Unlimited purchasing power
Class 9 Social Science Part 1 Chapter 9 MCQs Set 3
Q11. What does supply mean in economics?
[A]. Only the goods already bought by households
[B]. The quantity sellers are willing and able to offer at a particular price
[C]. The amount of money a consumer saves
[D]. Every item consumers wish to own
Q12. Why does a supply curve generally slope upwards, other factors remaining unchanged?
[A]. Sellers prefer to supply less whenever profits increase
[B]. Higher prices can make additional production more profitable
[C]. An upward slope shows that prices and quantities are unrelated
[D]. Higher prices always reduce producers’ willingness to sell
Q13. At one price, sellers A, B and C offer 3 kg, 7 kg and 8 kg of mangoes. What is market supply?
[A]. 56 kg
[B]. 21 kg
[C]. 8 kg
[D]. 18 kg
Q14. How can improved cold storage increase the supply of mangoes reaching distant markets?
[A]. It makes the law of demand irrelevant
[B]. It guarantees that every mango will have the same price
[C]. It removes consumers’ need to pay for mangoes
[D]. It reduces spoilage and keeps more mangoes saleable
Q15. A farmer expects chickpeas to be more profitable than wheat and shifts land to chickpeas. What explains this decision?
[A]. Farmers never respond to prices
[B]. Higher chickpea prices automatically create new farmland
[C]. Wheat and chickpeas must always be consumed together
[D]. The profitability of alternative products affects supply decisions
Class 9 Social Science Part 1 Chapter 9 MCQs Set 4
Q16. Fuel and packaging costs rise while a product’s selling price remains unchanged. What is a likely effect on its supply?
[A]. Every producer’s profit must increase
[B]. Some producers may supply less because production becomes less profitable
[C]. Demand automatically becomes equal to supply
[D]. Supply must increase because costs are higher
Q17. At ₹100 per kilogram, buyers demand 12 kg of mangoes and sellers offer 12 kg. What does this represent?
[A]. A surplus of 12 kg
[B]. A shortage of 24 kg
[C]. The absence of market demand
[D]. Market equilibrium
Q18. At a price of ₹40, buyers demand 38 kg and sellers supply 6 kg. What is the market condition?
[A]. Equilibrium at 6 kg
[B]. A shortage of 32 kg
[C]. A surplus of 32 kg
[D]. A shortage of 44 kg
Q19. At ₹150, buyers demand 8 kg and sellers supply 43 kg. What is likely if prices can adjust freely?
[A]. A shortage of 35 kg puts upward pressure on price
[B]. A surplus forces every buyer to purchase more immediately
[C]. A surplus of 35 kg puts downward pressure on price
[D]. The market is already in equilibrium
Q20. Why may the same hotel room cost more on New Year’s Eve than on an off-season weekday?
[A]. A hotel room becomes a different physical product every night
[B]. Demand changes while the number of available rooms is limited
[C]. Seasonal events never affect consumers’ willingness to book
[D]. Government fixes all hotel tariffs at one nationwide rate
Class 9 Social Science Part 1 Chapter 9 MCQs Set 5
Q21. How can excessive extraction of groundwater for present production affect future markets?
[A]. It guarantees unlimited future agricultural supply
[B]. It prevents all future changes in demand
[C]. It removes the need to consider sustainability
[D]. It can reduce future water availability and make production harder
Q22. What is a price ceiling?
[A]. The total income earned from all sales
[B]. A maximum price that sellers are legally allowed to charge
[C]. The point where demand and supply curves meet
[D]. A minimum price that sellers must always exceed
Q23. Why is a legally fixed minimum wage an example of a price floor?
[A]. It sets the highest wage any worker may receive
[B]. It guarantees identical wages for every occupation
[C]. It sets a lower limit on the wage an employer may pay for covered work
[D]. It abolishes the payment of wages
Q24. Which situation best describes a monopoly?
[A]. One seller supplies a product with no close substitutes
[B]. Several buyers purchase from hundreds of independent sellers
[C]. Many sellers compete by offering similar products
[D]. Every household produces exactly what it consumes
Q25. Which regulator–sector pairing is correct in the chapter’s examples?
[A]. TRAI — telecommunications
[B]. RBI — railway timetables
[C]. TRAI — forest conservation
[D]. SEBI — primary school admissions
Class 9 Social Science Part 1 Chapter 9 MCQs Set 6
Q26. Which example best illustrates a service benefiting the wider public that government commonly provides?
[A]. A private streaming subscription used by one customer
[B]. A personalised birthday cake bought by one family
[C]. A pair of shoes purchased for one person
[D]. Streetlighting on a public road
Q27. Residents want a public park but each expects others to pay for it. What problem can result?
[A]. The park becomes costless to build
[B]. Demand for the park proves that sufficient funds already exist
[C]. Too little funding is collected despite widespread benefit
[D]. Everyone automatically contributes an equal amount
Q28. A maximum price is fixed below the market equilibrium price, without measures to expand supply. What risk does the chapter highlight?
[A]. A guaranteed surplus under every circumstance
[B]. A shortage as buyers want more while suppliers may offer less
[C]. The automatic disappearance of production costs
[D]. An immediate increase in every producer’s profit
Q29. How can excessive licensing and compliance requirements affect a small business?
[A]. They always eliminate every business expense
[B]. They remove the need for any investment
[C]. They can increase time and costs, discouraging entry or expansion
[D]. They ensure that all businesses become monopolies
Q30. Which approach best balances government intervention with people’s welfare?
[A]. Consider consumers, workers and producers, then assess benefits and possible unintended effects
[B]. Remove every safeguard without considering public needs
[C]. Protect only sellers regardless of harm to consumers
[D]. Keep every price permanently fixed regardless of changing conditions
How to Analyse Demand, Supply and Market Equilibrium
- Identify whether the initial change concerns buyers, sellers or both.
- Check influences such as income, input costs, seasonality and alternative products.
- Compare quantity demanded with quantity supplied at the stated price.
- Explain the likely pressure on price while recognising that market conditions can change.
- Add individual quantities at the same price when calculating market demand or market supply.
- Calculate a shortage or surplus by subtracting the smaller quantity from the larger one.
- Consider both affordability for buyers and incentives for sellers when evaluating a price control.
- Distinguish an intended policy benefit from a possible unintended market consequence.
Demand, Supply and Price Controls: Revision Essentials
- Demand requires willingness and ability to buy at a particular price.
- Substitutes can replace each other; complements are used together.
- Equilibrium occurs when quantity demanded equals quantity supplied.
- A price ceiling sets a maximum, while a price floor sets a minimum.
- Seasonal needs and expectations about future prices can change present demand.
- Production technology and input costs can affect the quantity suppliers offer at a given price.
- A shortage exists when quantity demanded exceeds quantity supplied at the stated price.
- A surplus exists when quantity supplied exceeds quantity demanded at the stated price.
Explain Price Changes through Market Conditions
The Price Puzzle becomes easier when every answer identifies what has changed. A larger harvest, a festival, rising transport costs or expectations of future discounts can affect a market in different ways. Before predicting a price movement, decide whether the initial change concerns demand or supply and keep the other stated conditions in mind. Review numerical questions by calculating the gap between quantities, then explain how that gap can put pressure on price. Government intervention adds a further question: how can essential needs be protected while maintaining supply? Thinking through both sides helps you write balanced explanations instead of assuming that every lower price benefits everyone equally.
NCERT Solutions for The Price Puzzle: Extend Your Market Reasoning
Read NCERT Solutions for Class 9 Social Science Part 1 Chapter 9 for written practice with demand, supply and policy examples. Draw a small table when a question gives prices, quantities and identify the condition at each price before writing a conclusion. In a descriptive answer, explain the original change and its likely effects in order. For government action, discuss the problem being addressed and any limits to the proposed response. Comparing your reasoning with the solution can reveal whether an error came from calculation or from interpreting the market situation.
