NCERT Solutions for Class 9 Social Science Chapter 8 Building Blocks in Economics: The Problem of Choice 2026-27

The Big Questions

1. What does economics deal with? 

Answer: Economics deals with how individuals and societies make choices to use limited resources to satisfy unlimited needs and wants.

• Resources are limited and can have different uses, so choices have to be made about how they should be used.

• Economics studies how consumers, producers, governments, and financial institutions interact in an economy.

• It examines issues such as how people earn wages, how resources and wealth are distributed, how prices are determined, and how government policies and trade affect the economy.

• Economics also helps in comparing different alternatives, their opportunity costs, and their possible outcomes so that better decisions can be made.

Thus, economics is mainly concerned with making the best possible use of scarce resources.

2. What are the key questions in economics? 

Answer: The mismatch between unlimited wants and limited resources creates scarcity and gives rise to three key economic questions:

1. What to produce?

It means deciding which goods and services should be produced and in what quantities.

2. How to produce?

It means deciding which methods, resources, and technologies should be used for production. Producers must choose the right combination of land, labour, capital, and technology.

3. For whom to produce?

It means deciding who will receive or benefit from the goods and services produced. Producers consider consumers' needs, income, tastes, purchasing power, and demand.

These questions help an economy decide how its scarce resources can be used efficiently.

3. How do different economic systems address these questions?

Answer: Different economic systems answer the questions of what to produce, how to produce, and for whom to produce in different ways.

1. Planned Economy

• A central government authority makes the major economic decisions.

• The government decides what and how much to produce, how to produce it, who will receive it, and at what price.

• The government owns or controls many important resources and sectors.

2. Market Economy

• Economic decisions are mainly determined by demand and supply.

• Individuals and private companies own most resources and businesses.

• Government intervention is limited.

• Competition encourages better quality, lower prices, and innovation.

3. Mixed Economy

• It combines features of both planned and market economies.

• Private individuals, enterprises, and the government all take part in economic decision-making.

• Private ownership exists along with government regulation and public-sector participation.

Most modern economies have features of a mixed economic system. 

LET’S EXPLORE 

1. List three things your parents bought this month. Can you classify them into needs or wants? 

Answer:

1. Food – Need: Food is essential for daily life.

2. Medicines – Need: Medicines are necessary for health.

3. Restaurant meal – Want: A restaurant meal is a non-essential item and can be considered a want.

2. Do you think having too many wants may create problems? Why or why not? 

Answer: Yes, having too many wants can create problems because human wants are unlimited, while resources are limited.

• Resources cannot satisfy every want.

• Therefore, people have to make choices about which wants to satisfy first.

• Choosing one option often means giving up another option.

• The value of the option given up is called the opportunity cost.

Thus, unlimited wants and limited resources create scarcity and make economic choices necessary.

3. Ask your parents about how they make choices for everyday purchase. What is the opportunity cost of making a particular decision? 

Answer: I spoke to my parents about how they decide what to buy for our daily needs. They explained that they consider the family’s income, important needs, prices, and priorities before spending money. Essential items are purchased first, while non-essential things are bought only if there is enough money left.

They also explained opportunity cost to me. Whenever we choose one option, we may have to give up another. For example, if my parents decide to buy me a new school bag instead of going out for dinner, the restaurant dinner becomes the opportunity cost. This helped me understand that every decision involves giving up the next best alternative.

4. How do you decide to spend your time? Is time a scarce resource? 

Answer: I plan my time by following a daily schedule and focusing first on important tasks such as studying, completing homework, and helping with family responsibilities. Once these tasks are finished, I use my free time for sports, hobbies, or rest. 

Yes, time is a scarce resource because everyone has only 24 hours in a day. Therefore, it is important to use time carefully and wisely.

5. In your opinion, should the government completely stay out of enterprise decisions? 

Answer: In my opinion, the government should have a limited role in enterprise decisions rather than staying completely out. It should make laws and policies, protect consumers, provide essential public services, and ensure fair competition. At the same time, private businesses should have enough freedom to innovate, expand, and make their own decisions.

6. Can you think of an example where government action helped or harmed an industry or sector? 

Yes. The 1991 economic reforms in India supported many industries by reducing government restrictions and promoting private investment, competition, and innovation. In contrast, economies with excessive government control and strict licensing often experienced less competition and slower innovation, which could negatively affect industrial growth.

THINK ABOUT IT 

1. Should the government allocate more funds to healthcare and education or to defence and space exploration? Why or why not? 

Answer: Since government resources are limited, it must carefully decide how funds should be allocated. Spending more on one area means that fewer resources may be available for another, creating an opportunity cost.

Therefore, the government should compare:

• the needs of society,

• the available resources,

• the opportunity cost of each choice, and

• the possible outcomes of different alternatives.

A balanced decision should be made according to the country's needs and priorities so that scarce resources are used efficiently.

QUESTIONS AND ACTIVITIES 

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?

Answer: People's wants keep changing because their preferences, needs, income levels, tastes, and lifestyles may change over time. For example, a person may first want a bicycle, then a motorbike, and later a car.

This affects production because producers study:

• what consumers like,

• how much money they have, and

• how much demand exists for different products.

Based on these factors, producers decide what and how much to produce.

However, all our wants cannot be satisfied because human wants are unlimited while natural and human-made resources are limited. Therefore, choices have to be made about how scarce resources are used.

2. ‘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? 

Answer: The continuous demand for more puts pressure on the environment by increasing the use of natural resources, which can result in overexploitation, pollution, and environmental degradation. This impact can be reduced by using resources sustainably, conserving them, recycling materials, adopting renewable resources, and promoting responsible consumption.

3. Can you think of a resource in your region that is scarce but used wastefully? How could it be managed better? 

Answer: Water is a limited and valuable resource, but it is often wasted because of leaks, overuse, and poor management. We can conserve water by using rainwater harvesting, fixing leaking pipes, adopting efficient irrigation methods, reusing water whenever possible, and creating awareness about the importance of saving water.

4. 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? 

Answer: In my opinion, a Mixed Economy gives people greater economic freedom because both private individuals and the government take part in economic decision-making.

Private enterprises are free to operate, compete, and introduce new ideas, while the government regulates the market, protects public interest, and provides essential public goods and services.

A Mixed Economy also supports innovation and competition because businesses are encouraged to earn profits and improve their products and services. At the same time, government regulation helps ensure that economic activities benefit society.

Therefore, a Mixed Economy combines the strengths of both market and planned economies, making it a practical system for meeting the needs of people and society.

5. 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. 

Answer: Pure economic systems rarely exist because both completely planned and completely market-based systems have limitations.

Limitations of a planned economy:

• Major decisions are controlled by the government.

• Private ownership is limited.

• Strict permits and licences may restrict the number of enterprises.

• Limited competition may reduce the motivation to improve quality or innovate.

Limitations of a pure market economy:

• Decisions are mainly based on demand and supply with little government intervention.

• However, the chapter states that governments still play an important role even in market economies, especially in maintaining safety, law and order, and providing public goods and infrastructure.

Why a mixed economy is more practical:

• It combines features of both planned and market economies.

• Private individuals and enterprises can own businesses and participate in the market.

• The government can regulate private players and provide public goods and welfare programmes.

• The market can encourage competition, innovation, and profit-making.

• The government can support fair competition, consumer protection, and transparency.

Therefore, most economies combine market forces with government participation rather than following a completely pure economic system.

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? 

a. Demand c. Opportunity cost

b. Production  d. Inflation

Answer: Correct option: b. Opportunity cost

Explanation: The student has only ₹100, which is not enough to buy both the notebook and the tennis racket. If the student chooses to buy the notebook, they give up the option of saving that money for the tennis racket. The tennis racket becomes the opportunity cost because it is the next best alternative that the student has to give up.

7. How does understanding opportunity cost improve the quality of economic decision-making? 

Answer: Understanding opportunity cost improves economic decision-making because it helps people compare different alternatives before making a choice.

• Every choice involves giving up another alternative.

• Opportunity cost shows the value of what is sacrificed.

• It helps individuals, enterprises, and governments compare alternatives and their possible outcomes.

• It supports better planning and more efficient use of limited resources.

• It also helps decision-makers understand possible risks and opportunities.

Therefore, considering opportunity cost leads to more informed economic decisions.

8. Can effective economic decisions be made without reliable data? Support your answer with an example. 

Answer: No, effective economic decisions cannot be made properly without reliable data because good decisions depend on data and analysis rather than guesswork.

For example, enterprises study market trends and new innovations before making decisions so that they can better serve customers and maximise profits. Economists also use data from government reports, such as economic surveys, and company financial statements to understand risks, opportunities, and possible outcomes.

Therefore, reliable data helps individuals, enterprises, and governments make better-informed economic decisions.

9. 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? 

Answer: A country’s economic decisions today can strongly influence its future by affecting growth, employment, living standards, and environmental sustainability. Investments in areas such as education, healthcare, infrastructure, and technology can support long-term development. However, poor economic choices may lead to the overuse of resources and slower growth. Therefore, it is important to consider the long-term effects before making economic decisions.

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. 

Answer: This is an activity-based question. Students should complete it themselves as instructed in the question.

How to Use Vedantu’s Class 9 Social Science Chapter 8 Question Answers?

The NCERT Solutions for Building Blocks in Economics: The Problem of Choice can help students work through the chapter questions with a clear understanding of the concepts involved. Students can use the class 9 social science chapter 8 question answer solutions to:

• Understand each question: Read the explanation to identify what the question is asking before framing an answer.

• Check your answers: Compare your responses with the solved answers and identify concepts that need more attention.

• Improve answer writing: Observe how economic terms and examples are used to frame clear, well-structured answers.

• Understand difficult concepts: Use the explanations to make sense of ideas related to choice, scarcity, and opportunity cost.

• Prepare from one resource: The Building Blocks in Economics Class 9 question answer PDF brings the chapter questions and their explanations together for convenient study.

• Follow the 2026-27 curriculum: Use the Building Blocks in Economics Class 9 2026-27 solutions alongside the NCERT textbook for chapter-wise preparation.

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