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Class 9 Social Science

Chapter 8 Solutions — Building Blocks in Economics: The Problem of Choice

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Solutions

Overview

Step-by-step NCERT solutions for Building Blocks in Economics: The Problem of Choice (Chapter 8, NCERT Class 9 Social Science) — every question and answer worked out in full, not just the final result. You can also read the Building Blocks in Economics: The Problem of Choice textbook chapter.

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What these solutions cover

All 10 questions in Building Blocks in Economics: The Problem of Choice are solved in the PDF. Here's what's inside, exercise by exercise:

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?
  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?
  3. Can you think of a resource in your region that is scarce but used wastefully? How could it be managed better?
  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?
  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.
  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 b. Opportunity cost c. Production d. Inflation
  7. How does understanding opportunity cost improve the quality of economic decision-making?
  8. Can effective economic decisions be made without reliable data? Support your answer with an example.
  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?
  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.
Sample

Worked examples

A question from Building Blocks in Economics: The Problem of Choice, solved step by step.

Questions and activities

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 b. Opportunity cost c. Production d. Inflation

The student has limited money (₹100) and must choose between two alternatives: buying a notebook now or saving for a tennis racket. When the student picks one option, they give up the other. The value of the option given up is the opportunity cost.

The chapter defines opportunity cost as 'the value of what is given up' when one alternative is chosen over another. This situation is a direct example of that concept—choosing the notebook means the opportunity cost is the tennis racket (or vice versa).

Answer: b. Opportunity cost. The student must give up one option to choose the other. Whatever is not chosen—the notebook or the tennis racket—is the opportunity cost of the decision made.

All 10 questions in Building Blocks in Economics: The Problem of Choice are solved step by step in the Solutions PDF above.

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Read the Building Blocks in Economics: The Problem of Choice textbook chapter / PDF, or browse all NCERT Class 9 Social Science solutions.

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