Class 9 · Social ScienceNCERT 2026 Revised Syllabus
Chapter 8: Building Blocks in Economics: The Problem of Choice (0908CH08)
Understanding Society India and Beyond
Introduces the building blocks of economics — the problem of choice, needs and wants, opportunity cost, scarcity and how different economic systems answer the key questions.
Chapter code: 0908ch08 · Book: Understanding Society India and Beyond · Class 9 Social Science
Find complete NCERT solutions for Class 9 Social Science, Understanding Society India and Beyond Chapter 8. Every question has a clear, step-by-step answer for chapter code 0908CH08.
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Section 1: The Big Questions (Chapter Opener)(3 questions)
1
What does economics deal with?
Ans.
Economics deals with how individuals, enterprises, and governments make choices to use limited resources efficiently in order to satisfy unlimited human needs and wants.
2
What are the key questions in economics?
Ans.
Every economy must answer three key questions — what to produce, how to produce, and for whom to produce — since resources are scarce in relation to human wants.
3
How do different economic systems address these questions?
Ans.
In a market economy, demand and supply decide these questions; in a planned economy, the government decides them; and in a mixed economy, both government and private enterprise share this decision-making role.
Let's Explore — Needs vs Wants (Choices and Limited Resources)(2 questions)
1
List three things your parents bought this month. Can you classify them into needs or wants?
Ans.
Groceries, medicines, and school stationery bought during the month are needs, as they are essential for daily survival and study. A new mobile phone or festive clothing bought in the same period would be a want, since it adds comfort and is not essential for survival. (Sample answer — students should write examples based on their own household purchases.)
2
Do you think having too many wants may create problems? Why or why not?
Ans.
Yes, having too many wants can create problems because resources and income are limited. Constantly chasing new wants may lead to overspending, debt, reduced savings, and neglect of essential needs, thereby disturbing financial and personal well-being.
Let's Explore — Opportunity Cost and Time (What does Economics Deal with?)(2 questions)
1
Ask your parents about how they make choices for everyday purchases. What is the opportunity cost of making a particular decision?
Ans.
Parents often choose to cook at home instead of eating out to save money for monthly expenses. Here, the opportunity cost is the convenience and enjoyment of a restaurant meal that is given up. (Sample answer — students should record an actual choice made by their parents and identify what was foregone.)
2
How do you decide to spend your time? Is time a scarce resource?
Ans.
Yes, time is a scarce resource because each day has only 24 hours available to everyone. Choosing to spend time studying means giving up time for leisure or play, showing that time, like money, involves a trade-off.
Think About It — Government Spending Priorities (How to Produce?)(1 questions)
1
Hard
Should the government allocate more funds to healthcare and education or to defence and space exploration? Why or why not?
Ans.
This is a matter of opportunity cost in government spending. Healthcare and education build human capital, improve productivity, and raise long-term living standards, while defence and space exploration ensure national security and technological advancement. Since both are important, the government should balance funding between them according to the country's current needs, threats, and available resources, rather than favouring only one sector.
Let's Explore — Role of Government in a Market Economy (Market Economy)(2 questions)
1
In your opinion, should the government completely stay out of enterprise decisions?
Ans.
No, the government should not completely stay out of enterprise decisions. Even in a market economy, the government must ensure law and order, consumer protection, and fair competition rules to prevent exploitation, monopoly, and unfair trade practices.
2
Can you think of an example where government action helped or harmed an industry or sector?
Ans.
The economic reforms of 1991 in India, which reduced licensing restrictions and opened the economy to trade and investment, helped Indian industries grow, attract investment, and become more competitive globally. (Sample answer — any other correctly justified example of government action helping or harming a sector is equally valid.)
Section 6: Questions and Activities (End of Chapter)(10 questions)
1
Why do you think people's wants keep changing over time? How does this affect production in an economy? Why cannot all our wants be satisfied?
Ans.
People's wants keep changing due to rising incomes, new technology, changing fashion, and greater awareness. This forces producers to continuously innovate and diversify what they produce. Since resources remain limited while wants keep multiplying, all wants can never be fully satisfied.
2
Hard
'Human wants are unlimited and keep changing'. How do you think this constant desire for more creates pressure on the environment? Can the fulfilment of wants and the extraction of resources be balanced?
Ans.
Unlimited and ever-changing wants increase the demand for natural resources, leading to over-extraction, pollution, and depletion of the environment. This pressure can be balanced through sustainable practices, recycling, responsible consumption, and resource-efficient technologies, ensuring resources remain available for future generations as well.
3
Can you think of a resource in your region that is scarce but used wastefully? How could it be managed better?
Ans.
Groundwater is a resource that is scarce in many regions but is often used wastefully through flood irrigation and leaking pipelines. It could be managed better through rainwater harvesting, drip irrigation, and stricter regulation of its extraction. (Sample answer — students may cite any locally scarce resource, such as water, forests, or land, with a suitable management suggestion.)
4
Hard
Which economic system — market, planned, or mixed — do you think gives people the most freedom? Which economic system is best suited for promoting innovation? Why?
Ans.
A market economy gives people the most freedom, since individuals and enterprises are free to make their own decisions about production, consumption, and prices without government control. A market economy is also best suited for promoting innovation, because competition among producers motivates them to improve quality, reduce costs, and introduce new products.
5
Hard
Critically examine why pure economic systems rarely exist in reality. Assess the limitations of such systems and justify why a mixed economy is often considered a more practical and effective approach in real-world contexts.
Ans.
A pure market economy can lead to inequality, monopoly, and neglect of public welfare, since producers focus only on profit. A pure planned economy discourages competition and innovation, as enterprises merely follow government targets instead of consumer demand. Because of these limitations, no country follows either system in its pure form. A mixed economy is more practical, as it combines the efficiency and innovation of private enterprise with government regulation, welfare programmes, and public goods, making it better suited to real-world needs.
6
A student has ₹100 and must choose between buying a notebook or saving the money for buying a tennis racket later. Which economic concept best explains this situation?
Ans.
(b) Opportunity cost — buying the notebook means giving up the value of saving towards the tennis racket, which is its opportunity cost.
7
How does understanding opportunity cost improve the quality of economic decision-making?
Ans.
Understanding opportunity cost helps individuals, enterprises, and governments compare the value of the alternative given up against the option chosen. This leads to more rational, informed, and efficient use of limited resources.
8
Can effective economic decisions be made without reliable data? Support your answer with an example.
Ans.
No, effective economic decisions cannot be made without reliable data, as decisions without data become mere guesswork. For example, a farmer deciding which crop to sow needs data on rainfall, soil condition, and market demand to make a sound and profitable choice.
9
Hard
Analyse how a country's present economic choices can shape its long-term future. Why is it important to consider future consequences while making economic decisions today?
Ans.
Present economic choices, such as investing in education, health, or infrastructure, determine a country's future productivity, growth, and quality of life. If future consequences are ignored for short-term gains, it can lead to resource depletion, rising debt, or slower long-term development, making it essential to consider long-term impact while deciding today.
10
Identify a news article from any newspaper of your choice about a product or commodity (such as vegetables, fruits, fuel, or electronics) where producers or companies are deciding how much to produce or supply. Write 2–3 sentences explaining the example you found and why the production decision was made.
Ans.
A news report on onion farmers noted that a favourable monsoon led farmers to increase onion cultivation, expecting higher yields and better prices. However, the resulting oversupply later caused market prices to fall sharply, showing that production decisions are guided by expected demand, supply, and market prices. (Sample answer — students should attach or refer to an actual, current news article and explain the production decision described in it.)