NCERT Solutions for Class 9 Social Science Chapter 8 Building Blocks in Economics: The Problem of Choice

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Class 9 Social Science Chapter 8 Question Answer

Answer:
Economics deals with how people, businesses, and governments make choices to use their limited resources to satisfy unlimited wants and needs. The word ‘Economics’ comes from the Greek word oikonomia, meaning household management. It studies how producers, consumers and the government interact, such as how prices are set and how resources are used wisely.

Answer:
Economics deals with three key questions:

• What to produce – which goods and services should be made and in what quantity.
• How to produce – whether to use more labour or more machines/technology.
• For whom to produce – who will use or benefit from the goods produced.

Answer:

• In a planned economy, the government decides what, how and for whom to produce. Example: North Korea, Cuba.
• In a market economy, these decisions are made by demand and supply, with little government control. Example: USA, Japan.
• In a mixed economy, both the market and the government share these decisions together. Example: India, Germany.

Answer:
The three things my parents bought this month are:

1. Groceries (rice, vegetables and milk) – These are needs because they are essential for our daily food and survival.
2. School notebooks and uniform – These are needs because they are necessary for my education.
3. A new smartwatch/branded shoes – This is a want because it is purchased for comfort, convenience or style rather than being essential for daily living.

Answer:
Yes, having too many wants can create problems because resources like money, time and natural resources are limited. If people keep wanting more things, they may end up spending beyond their means, leading to debt or financial stress. It can also create pressure on the environment, since more wants lead to more use of natural resources, causing pollution and resource depletion. However, some wants can be positive if they motivate people to work harder and improve their standard of living, as long as they are fulfilled within one’s means and don’t lead to wasteful or harmful consumption.

Answer:
My parents make choices for everyday purchases by considering the family’s needs, budget and priorities. They first spend money on essential items such as groceries, electricity bills, school expenses and savings before buying non-essential things.
For example, if my parents decide to buy new furniture, they may have to postpone a family vacation due to budget limitations. In this case, the opportunity cost of buying the furniture is the family vacation that they gave up or delayed.

Answer:
I decide how to spend my time by setting my priorities. I first complete important tasks such as studying, doing homework, and helping at home. After finishing these responsibilities, I spend my remaining time playing, relaxing or watching television.
Yes, time is a scarce resource because everyone has only 24 hours in a day, and once time is used, it cannot be recovered. Therefore, time should be used wisely. For example, if I spend my time watching TV, I have less time available for studying. This loss of study time is the opportunity cost of my decision.

Answer:
This question does not have one fixed answer, as it depends on what a country needs most at a given time.

• Healthcare and education are important because they keep people healthy and skilled, which helps the country grow in the long run.
• Defence is also necessary to protect the country and keep its citizens safe.
• Since government funds are limited, spending more on one area means less money for the other – this is the opportunity cost of the decision.
• In my opinion, a country like India should focus more on healthcare and education, since many people still lack basic facilities, while still spending a reasonable amount on defence for safety and security.

Class 9 Social Science Chapter 8 Exercises Question Answer

Answer:
People’s wants keep changing over time due to new inventions, technological advancements, changing fashion trends, rising incomes, advertisements, and changes in lifestyle. As people’s needs and preferences change, they start demanding new and better goods and services.
These changing wants affect production in an economy because producers must continuously adjust what and how much they produce to meet consumer demand. New industries develop to produce new products, while industries that fail to adapt may decline.
However, all our wants cannot be satisfied because human wants are unlimited, whereas resources such as land, labour, capital, and technology are limited. This shortage of resources is known as scarcity. Therefore, people must make choices and give up some wants to satisfy more important ones.

Answer:
Human wants are unlimited and keep changing, which increases the demand for goods and services. To meet these demands, more natural resources such as land, water, forests and minerals are extracted. Excessive use of these resources can lead to deforestation, pollution, depletion of natural resources and climate change, putting pressure on the environment.
Yes, the fulfilment of human wants and the extraction of resources can be balanced through sustainable development. This can be achieved by using natural resources wisely, adopting eco-friendly practices, promoting recycling, using renewable sources of energy and following government regulations to protect the environment. In this way, we can meet our present needs without harming the ability of future generations to meet theirs.

Answer:
In my region, water is a scarce resource, but it is often wasted through leaking pipes, overuse in irrigation, and careless use in homes. This unnecessary wastage reduces the availability of water for future needs. Water can be managed better by repairing leakages on time, using water-efficient methods such as drip irrigation, practising rainwater harvesting, and creating awareness about the importance of water conservation. These measures will help use water wisely and ensure its availability for future generations.

Answer:
The market economy gives people the most freedom because individuals and private businesses are free to decide what to produce, buy and sell with minimal government interference. Consumers also have the freedom to choose from a wide variety of goods and services.
The market economy is also best suited for promoting innovation. Since many producers compete with one another, they are encouraged to improve the quality of their products, introduce new technologies, and offer better services at competitive prices. This competition motivates businesses to innovate and meet the changing needs of consumers. In contrast, a planned economy has limited competition, so there is less motivation for innovation and improvement.

Answer:
Pure economic systems rarely exist in reality because no single system can effectively meet all the needs of a modern economy. Both market economies and planned economies have certain limitations.
A market economy promotes freedom, competition and innovation, but it can also lead to income inequality, exploitation of consumers and workers, and inadequate provision of public goods such as roads, parks and healthcare. On the other hand, a planned economy ensures better control over resources and aims to reduce inequality, but it often discourages competition, reduces innovation and may result in inefficiency and poor-quality goods and services.

A mixed economy is considered a more practical and effective approach because it combines the strengths of both systems. The private sector promotes competition, efficiency and innovation, while the government provides essential public services, protects consumers, ensures fair competition and supports the welfare of society. By balancing private enterprise with government intervention, a mixed economy helps achieve both economic growth and social welfare.

(a) Demand
(b) Opportunity cost
(c) Production
(d) Inflation
Answer:
(b) Opportunity cost
Reason: Since the student has limited money, choosing to buy the notebook means giving up the chance to save for the tennis racket and the value of this option given up is known as opportunity cost.

Answer:
Understanding opportunity cost improves the quality of economic decision-making because it helps people compare the benefits of all available alternatives before making a choice. It encourages the efficient use of scarce resources and reduces unnecessary waste.
By considering what must be given up, individuals, businesses and governments can make more rational and informed decisions. It also promotes long-term thinking by helping people choose options that provide greater benefits in the future rather than focusing only on short-term gains.

Answer:
No, effective economic decisions cannot be made without reliable data. Decisions based on guesswork or assumptions may lead to poor planning and inefficient use of resources. Reliable data helps governments, businesses and individuals make informed and accurate decisions.
For example, the Government of India uses information from the Economic Survey, such as data on agriculture, employment, inflation and economic growth, while preparing the Union Budget. This data helps the government decide how funds should be allocated to sectors like healthcare, education, infrastructure and defence according to the country’s actual needs.

Answer:
Economic decisions often have long-term effects on individuals and the economy. For example, investing in education and healthcare today helps create a healthier and more skilled workforce in the future, leading to higher productivity and economic growth. On the other hand, growing water-intensive crops such as sugarcane in areas with limited water resources can lead to water scarcity and poor soil health. Similarly, using machines instead of labour may increase production in the short term but can reduce employment opportunities in the future.
Therefore, it is important to consider the future consequences of economic decisions. Resources used carelessly today may not be available for future generations. Every economic choice has an opportunity cost and its effects can continue for many years. Making sustainable and well-informed decisions helps ensure the long-term progress, stability and overall development of a country.

Answer:
“Centre Raises Onion Procurement Price to ₹16.50/kg” (June 2026)
In June 2026, the Government of India increased the procurement price of onions under its buffer stock programme to ₹16.50 per kg. The price was revised after considering the prevailing mandi rates and the quality standards required for long-term storage onions.
The decision was taken because onion farmers, particularly in Maharashtra, were facing higher cultivation costs due to increased spending on labour, fertilizers and irrigation. Farmers demanded better prices to ensure fair returns for their produce.

This example shows how the government, acting as a buyer in the market, adjusts its procurement decisions according to production costs and the needs of farmers. At the same time, it aims to maintain a sufficient buffer stock to protect consumers from sharp price increases and ensure a stable supply of onions.

Class 9 Social Science Chapter 8 Very Short Answer Type Questions with Explanation.

1. What is the origin of the word ‘Economics’?
See AnswerIt comes from the Greek word oikonomia, made up of oikos (household) and nemein (management), meaning household management.

2. Define opportunity cost.
See AnswerThe value of the next best alternative given up when one option is chosen over another.

3. What is the Production Possibility Curve (PPC)?
See AnswerA curve showing different combinations of goods that can be produced using all available resources efficiently.

4. Name the four factors of production.
See AnswerLand, labour, capital and technology.

5. What are needs and wants?
See AnswerNeeds are essentials like food, water and shelter; wants are non-essential desires like gadgets, vacations or luxury items.

6. What is a planned economy?
See AnswerAn economic system where the government’s central authority determines the price and allocation of resources, goods and services.

7. What is a market economy?
See AnswerAn economic system where resource allocation and prices are determined primarily by market forces (demand and supply) with minimal government intervention.

8. What is a mixed economy?
See AnswerAn economic system combining features of both market and planned economies, where private sector and government coexist.

9. Name three key questions in economics.
See AnswerWhat to produce, how to produce and for whom to produce.

10. What are public goods? Give an example.
See AnswerGoods available to all individuals without exclusion, such as parks, roads, street lights and basic education.

11. What is the Economic Survey of India?
See AnswerAn annual document by the Ministry of Finance reviewing the country’s economic performance, presented in Parliament before the Union Budget.

12. Name three examples of planned economies.
See AnswerThe former Soviet Union, North Korea and Cuba.

13. Name three examples of market economies.
See AnswerThe US, Japan and Hong Kong.

14. When did India shift toward a mixed economy?
See AnswerPost-1991, through major economic reforms that reduced regulations and opened the economy to global trade.

15. What is labour-intensive production?
See AnswerA production method using more workers and less machinery, common in agriculture and handicrafts.

Class 9 Social Science Chapter 8 Short Answer Type Questions with Explanation.

1. Explain the concept of opportunity cost with an example.
See AnswerOpportunity cost is the value of what is given up when choosing one alternative. For example, if a farmer grows more barley, some wheat production must be sacrificed—this sacrificed wheat is the opportunity cost.

2. How does the Production Possibility Curve help in decision-making?
See AnswerThe PPC shows the maximum output achievable through efficient resource use, illustrating trade-offs between goods. It helps enterprises and governments plan production by understanding opportunity costs of different combinations.

3. Why do human wants keep changing and remain unlimited?
See AnswerAs living standards improve and new products emerge, people’s aspirations evolve—for instance, upgrading from a bicycle to a motorbike to a car—making wants continuously expanding and never fully satisfiable with limited resources.

4. What determines a producer’s choice of production technique?
See AnswerThe cost of capital, availability of technology, nature of the product (customised vs. mass-produced), cost of labour and government laws/regulations all influence whether production is labour-intensive or capital-intensive.

5. How does the question ‘for whom to produce’ influence production decisions?
See AnswerProducers decide which consumer group to serve based on income levels, needs and purchasing power—for example, producing affordable school shoes for students versus premium leather shoes for office-goers.

6. What is the difference between a planned economy and a market economy?
See AnswerIn a planned economy, the government controls resource allocation and prices through central planning; in a market economy, demand and supply forces determine allocation and prices with minimal government intervention.

7. How does a mixed economy function?
See AnswerA mixed economy allows the market to guide profit-making enterprises and innovation, while the government regulates, provides public goods, ensures fair competition, consumer protection and implements welfare programs.

8. Explain how India’s economy has evolved since independence.
See AnswerIndia initially followed a state-led planned approach with government control over industries via licenses/permits. After facing economic difficulties by 1991, reforms reduced regulations, encouraged private enterprise, and shifted India toward a mixed economy.

9. Why are economic decisions based on data important?
See AnswerGood decisions rely on data and analysis rather than guesswork—families allocate money using budgets, governments use tax revenue data for planning, and businesses study market trends to make informed choices.

10. What is the scope of work of economists?
See AnswerEconomists work in policymaking (guiding taxation/welfare spending), business consulting (helping firms grow), research and education (studying trends) and finance (advising investors), using data to analyse alternatives and outcomes.

Class 9 Social Science Chapter 8 Long Answer Type Questions with Explanation.

1. Explain the concept of scarcity and choice using the Production Possibility Curve (PPC).
See AnswerResources are limited while human wants are unlimited, forcing individuals, enterprises and governments to make choices. The PPC illustrates this through a farmer choosing between growing barley and wheat—as shown in the table (Combinations A to E), producing more barley means sacrificing wheat production. When plotted, this creates a downward-sloping curve showing maximum possible output combinations using available resources efficiently, with every point representing an opportunity cost trade-off, aiding better planning and decision-making by enterprises and governments.

2. Discuss the three key questions that economics seeks to address.
See AnswerEvery economy faces three fundamental questions arising from scarcity: “What to produce” concerns which goods/services and quantities should be produced—for instance, choosing between water-intensive sugarcane (high profit) versus drought-resistant millets (sustainability). “How to produce” involves selecting the right mix of land, labour, capital and technology—whether production should be labour-intensive or capital-intensive based on costs and technology availability. “For whom to produce” addresses which consumer groups benefit, as seen in shoe manufacturing where school shoes, office shoes and sports shoes target different income groups and needs.

3. Describe the three types of economic systems with examples.
See AnswerA planned economy has a central government authority controlling all major economic decisions—production, pricing and distribution—with examples like the former Soviet Union, North Korea and Cuba; this limits competition and innovation. A market economy relies on demand and supply forces with minimal government intervention, where private ownership dominates, as seen in the US, Japan and Hong Kong, encouraging quality and innovation through competition. A mixed economy combines both systems—the market drives profit-making and innovation while the government regulates, provides public goods and ensures fair competition—as practised in India (post-1991), China (post-1978), Germany and Sweden.

4. How has India’s economic system evolved since independence, and why?
See AnswerAfter independence, India adopted a state-led approach resembling a planned economy, with the government controlling industries, allocating resources and regulating production through licenses and permits. Key sectors like banking, transport and heavy industries were dominated by the public sector, limiting private enterprise and competition. However, by 1991, India faced serious economic difficulties, prompting major reforms that reduced excessive regulations, encouraged private enterprise, opened the economy to global trade and investment and increased competition. These reforms gradually transformed India into a mixed economy, balancing market forces with continued government involvement in regulation and welfare.

5. Explain why understanding opportunity cost is essential for individuals, enterprises, and governments.
See AnswerOpportunity cost represents the value of the next best alternative forgone when a choice is made, helping entities make informed decisions rather than guesswork-based ones. For individuals, it means weighing spending choices, like buying snacks versus saving for shoes. For farmers, growing more of one crop means sacrificing another, as shown in the PPC. For governments, allocating funds to healthcare versus defence involves weighing long-term benefits against immediate needs. Understanding opportunity cost enables better resource allocation, balancing short-term gains against long-term sustainability and ensures that scarce resources are used efficiently to maximise overall benefit to society.