CBSE Class 9 Social Science Chapter 09 The Price Puzzle What Drives The Market MCQs Set 01

Answer: (B) As price decreases, she purchases larger quantities

Explanation:
The text shows Srivalli buying 1 kg at ₹150, 2 kg at ₹100, and 3 kg at ₹50. This demonstrates the Law of Demand: lower prices lead to higher quantities demanded.

Answer: (B) Tea demand will increase because consumers switch from expensive coffee

Explanation:
Substitute goods can replace each other in consumption. When one becomes more expensive, consumers shift toward the cheaper alternative, so tea demand rises when coffee becomes costlier.

Answer: (B) Cartridge demand would increase because printers and cartridges are complementary goods

Explanation:
Complementary goods are used together; more printers in use means more cartridges are needed. The chapter illustrates this with the example that increased printer demand raises cartridge demand even if cartridge price remains unchanged.

Answer: (B) Her willingness to pay decreases as she consumes more mangoes

Explanation:
Diminishing marginal utility means each additional unit provides less additional satisfaction. As additional satisfaction declines, consumers are willing to pay less for successive units, so demand falls.

Answer: (B) Demand for books is influenced by seasonality and cultural timing rather than price alone

Explanation:
The chapter explicitly states that seasonality affects demand based on weather, festivals, and cultural habits. Back-to-school season creates predictable demand spikes independent of price changes.

Answer: (B) Current demand would decrease because consumers would postpone purchases

Explanation:
Future price expectations influence present demand decisions. When people anticipate price drops, they delay buying now, thereby decreasing current demand. The chapter gives the example of consumers postponing durable goods purchases before expected festival discounts.

Answer: (B) Higher chickpea prices offer greater profitability, making them the better supply choice

Explanation:
Supply depends on the profitability of different alternatives. The chapter shows that a farmer facing high chickpea prices and low wheat prices will shift production toward chickpeas to maximize returns.

Answer: (B) Market supply would increase because improved technology reduces production costs and raises yields

Explanation:
Improved technology reduces production costs and allows producers to increase output. The chapter notes that drip irrigation reduces water use by 40 percent while increasing yield by 30 percent, enabling higher supply at different price points.

Answer: (C) Quantity demanded equals quantity supplied; there is neither shortage nor surplus

Explanation:
Market equilibrium occurs where quantity demanded equals quantity supplied. At this point, there is no pressure for prices to change because the market is 'cleared'—neither shortage nor surplus exists.

Answer: (B) These changes reflect dynamic market conditions—demand surged on New Year's Eve while July had low tourist season demand

Explanation:
Hotels adjust prices based on demand and supply conditions. July is off-season with low demand, justifying low tariffs. New Year's Eve has very high demand, allowing hotels to charge premium prices. This shows markets constantly adjust toward new equilibria.

Answer: (B) To prevent overcharging and ensure fair access during a crisis when hoarding and black-marketing occurred

Explanation:
During COVID-19, sanitizer demand surged while some traders hoarded and black-marketed products at inflated prices. Price caps protected consumers from exploitation while encouraging increased production by making competition viable.

Answer: (B) Public goods benefit everyone but do not generate direct profit, and individuals avoid paying if others contribute first

Explanation:
The chapter explains the free-rider problem: families benefit from a park even if others pay for it, so insufficient funding is collected privately. Public goods require government provision to ensure all citizens benefit and social welfare is served.

Answer: (B) When government sets maximum prices below market levels, farmers receive inadequate returns on their investments, discouraging technology adoption

Explanation:
If a government fixes wheat at ₹20/kg while market forces set it at ₹30/kg, farmers earn less than in a free market. This reduced profitability removes incentive to invest in better seeds, irrigation systems, or improved techniques, ultimately reducing long-term productivity and supply.

Answer: (B) It increases as consumers are willing to buy more at lower prices

Explanation:
The Law of Demand establishes an inverse relationship between price and quantity demanded. As the chapter explains using Srivalli's mango example, when prices fall from ₹150 to ₹100 to ₹50 per kg, she purchases progressively larger quantities—1 kg, 2 kg, and 3 kg respectively.

Answer: (B) Factors beyond price alone—such as features, brand trends, and consumer preferences—influence demand

Explanation:
The chapter emphasizes that demand depends on multiple determinants beyond price. When a new smartphone model launches, long queues and pre-bookings occur despite premium pricing because consumer taste and preference for the new features drive demand independently of the price mechanism shown in the basic Law of Demand.

Answer: (B) Market demand is the sum of all individual consumers' demands at each price level

Explanation:
• Market demand aggregates multiple consumers (Srivalli, Alex, and Israt in the chapter's example)
• At ₹150, individual demands were 1 kg, 2 kg, and 3 kg respectively—totaling 6 kg market demand
• When price falls to ₹50, individual demands rise to 3 kg, 6 kg, and 9 kg—totaling 18 kg market demand
• The market curve is flatter and more responsive because many consumers react to price changes simultaneously.

Answer: (B) The Law of Supply

Explanation:
The Law of Supply shows a direct relationship: as price rises, quantity supplied increases, and as price falls, quantity supplied decreases. Higher prices increase profitability, motivating suppliers to produce more. In this flour example, the price increase incentivizes bakers and wholesalers to supply greater quantities to the market.

Answer: (B) Popcorn demand will decrease because fewer people will attend movies

Explanation:
Movie tickets and popcorn are complementary goods—they are typically consumed together to provide utility. When the price of movie tickets rises, fewer people attend cinemas, reducing demand for items used alongside the ticket experience. The chapter illustrates this principle by noting that higher movie ticket prices lead people to refrain from going to cinemas, thereby reducing popcorn sales.

Answer: (C) Excess demand caused prices to rise significantly

Explanation:
When supply falls short of demand, a shortage occurs and prices rise. The chapter's COVID-19 example describes how mask demand surged but supply could not catch up immediately, leading to sharp price increases. Over time, as suppliers adjusted production to meet demand, prices eventually fell back toward equilibrium levels, illustrating how real-world markets constantly adjust toward new equilibrium points.

Answer: (B) The farmer allocates more land to chickpeas due to higher profitability

Explanation:
Prices of related goods influence supply decisions. The chapter illustrates this using the example of a farmer choosing between wheat and chickpeas: if chickpea prices are high while wheat prices are low, the farmer shifts production toward chickpeas to maximize profit. This demonstrates how suppliers respond rationally to price signals when choosing among alternative goods.

Answer: (C) Higher prices increase profitability, encouraging producers to supply more quantity

Explanation:
The upward slope reflects the Law of Supply. Higher prices create stronger incentives for producers: they increase profit margins and attract new firms to enter the market. In the mango example, when price rises from ₹50 to ₹100 to ₹150 per kg, individual supplier A increases quantity supplied from 1 kg to 2 kg to 3 kg, demonstrating this direct price-quantity relationship.

Answer: (B) When quantity demanded equals quantity supplied, with no excess supply or shortage

Explanation:
Market equilibrium is where the demand and supply curves intersect. At this intersection point, quantity demanded exactly equals quantity supplied. The chapter shows that at ₹100 per kg in the mango market, both quantity demanded and supplied equal 12 kg. At equilibrium, there is neither shortage (excess demand) nor surplus (excess supply), so prices remain stable unless external conditions change.

Answer: (B) Markets continuously adjust prices based on changing demand and supply conditions

Explanation:
Real-world markets are dynamic, not static. The chapter's hotel tariff example demonstrates how prices respond to shifting demand and supply. During off-season weekdays in July, demand is low and supply of rooms is readily available, keeping prices down. On New Year's Eve, demand surges dramatically while room supply remains fixed, driving prices up to ₹25,000. Hotels adjust rates multiple times daily based on booking speed, nearby competition, and events to maximize revenue.

Answer: (B) Without regulation, essential goods might become unaffordable for vulnerable and low-income groups, raising fairness and equity concerns

Explanation:
Markets allocate goods based on willingness and ability to pay. If medicines become extremely expensive through market forces alone, poor and vulnerable citizens cannot access them despite needing them for survival. The chapter explains that government intervention becomes necessary when markets fail to ensure fair and equitable access to essential goods, protecting social welfare for disadvantaged populations.

Answer: (B) A price ceiling sets a maximum price, while a price floor sets a minimum price below which sellers cannot charge

Explanation:
These represent opposite regulatory approaches. A price ceiling (e.g., ₹100 for 200 ml sanitizers during COVID-19) prevents prices from rising above a set level, protecting consumers from overcharging. A price floor (e.g., minimum wage) prevents prices from falling below a set level, protecting producers and workers from being paid too little. The chapter uses both concepts to illustrate how government balances consumer protection and producer incentives.