Class 9 Social Science Part 1 Chapter 8 MCQs – Building Blocks in Economics: The Problem of Choice – begin with a familiar problem: time, money and other resources cannot meet every competing want. Building Blocks in Economics explains scarcity, opportunity cost and decisions about production. These 30 questions include the wheat and barley example, simple output comparisons and the roles of consumers, producers and government. You will also distinguish labour-intensive methods from capital-intensive production and compare economic systems. The answer explanations show what is sacrificed when one option is selected. Relate each concept to an actual choice so the vocabulary describes a decision you can understand.
Class 9 Social Science Part 1 Chapter 8 MCQs Set 1
Q1. What creates the basic economic problem of choice?
[A]. What creates the basic economic problem of choice?
[B]. Limited resources with competing uses and many wants
[C]. Identical preferences among all people
[D]. Unlimited resources with no alternative uses
Q2. Which item is most clearly a basic need in the chapter’s examples?
[A]. An optional luxury holiday
[B]. An expensive decoration bought only for fashion
[C]. The latest gadget despite a working alternative
[D]. Safe drinking water
Q3. Which statement correctly describes a market?
[A]. It may be a physical place or an online setting for exchange
[B]. It exists only when the government owns every shop
[C]. It excludes the sale of services
[D]. It must always be an open-air street
Q4. Why does the chapter show steel used in medical equipment, refrigerators and aircraft?
[A]. To suggest that no allocation decisions are necessary
[B]. To show that all products require identical production methods
[C]. To illustrate that one resource has alternative uses
[D]. To prove that steel is unlimited
Q5. What is opportunity cost?
[A]. The total value of every imaginable alternative combined
[B]. The amount of money saved regardless of what is sacrificed
[C]. The value of the best alternative forgone when making a choice
[D]. Only the money physically paid for a product
Class 9 Social Science Part 1 Chapter 8 MCQs Set 2
Q6. A student can spend one free hour either revising or playing a favourite game. What is the opportunity cost of choosing revision?
[A]. Every activity the student has ever done
[B]. The entire day’s sleeping time
[C]. The enjoyment of the game forgone
[D]. The price of all school textbooks
Q7. A farmer can use a plot for either wheat or barley. Why must a choice be made?
[A]. Both maximum outputs are always possible together
[B]. Opportunity cost disappears in agriculture
[C]. Growing crops never requires resources
[D]. The same limited land and inputs cannot fully support both maximum outputs
Q8. What does a Production Possibility Curve show?
[A]. Only the prices consumers prefer to pay
[B]. Efficient combinations of two goods possible with given resources
[C]. Only the total wages paid by a government
[D]. Every future output possible after unlimited technological change
Q9. Why does the chapter’s wheat–barley PPC slope downwards?
[A]. The farmer can use unlimited land at no cost
[B]. More barley requires giving up some wheat with the available resources
[C]. Wheat has no economic value
[D]. More barley automatically creates unlimited additional wheat
Q10. The farmer moves from 0 kg barley and 100 kg wheat to 25 kg barley and 90 kg wheat. How much wheat is sacrificed?
[A]. 25 kg
[B]. 10 kg
[C]. 100 kg
[D]. 90 kg
Class 9 Social Science Part 1 Chapter 8 MCQs Set 3
Q11. Moving from 25 kg barley and 90 kg wheat to 50 kg barley and 70 kg wheat sacrifices how much wheat?
[A]. 25 kg
[B]. 50 kg
[C]. 20 kg
[D]. 10 kg
Q12. Which conclusion follows from the wheat sacrifices of 10, 20, 30 and 40 kg for successive equal barley increases?
[A]. The opportunity cost of additional barley rises along these combinations
[B]. Every additional barley increase sacrifices the same wheat quantity
[C]. Wheat production rises with every barley increase
[D]. The opportunity cost of barley is always zero
Q13. What does a point on the chapter’s PPC represent?
[A]. A guarantee that society prefers that combination to every other one
[B]. Only the combination producing equal quantities of both goods
[C]. A maximum feasible combination with efficient use of available resources
[D]. An output combination requiring no resources
Q14. Why does efficient use of resources not remove the need for choice?
[A]. Opportunity cost exists only when resources are wasted
[B]. Efficient producers no longer face any wants
[C]. Efficiency means resources become infinite
[D]. Even efficient resources remain limited and have alternative uses
Q15. The word economics is traced to a Greek term connected with what?
[A]. Household management
[B]. Weather prediction
[C]. Military conquest
[D]. Ocean navigation
Class 9 Social Science Part 1 Chapter 8 MCQs Set 4
Q16. Which group consists of economic entities described in the chapter?
[A]. Consumers, producers, governments and financial institutions
[B]. Only buyers of luxury products
[C]. Only people who study economics professionally
[D]. Only farmers with privately owned land
Q17. Why should economic decisions use reliable data?
[A]. Data makes opportunity cost irrelevant
[B]. Data helps compare alternatives, likely outcomes and risks
[C]. Data guarantees that every prediction will be correct
[D]. Data replaces the need to think about objectives
Q18. What is the Economic Survey of India mainly intended to do?
[A]. Review economic performance, challenges and opportunities
[B]. List only the names of government employees
[C]. Declare election results for every state
[D]. Replace every company’s financial accounts
Q19. Which decision directly addresses what to produce?
[A]. Which customer group will receive the product
[B]. Whether to use workers or machines for the chosen product
[C]. Whether to grow millets or sugarcane on available land
[D]. Which name to give a historical era
Q20. A firm chooses between hand-stitching and machine-stitching the same garment. Which question is it addressing?
[A]. For whom to produce
[B]. How to produce
[C]. Whether the Earth has limited land
[D]. When an ancient civilisation developed
Class 9 Social Science Part 1 Chapter 8 MCQs Set 5
Q21. A shoe manufacturer targets affordable school footwear at students. Which question does this mainly address?
[A]. How many tectonic plates exist
[B]. For whom to produce
[C]. When to record a historical event
[D]. Whether resources have any alternative uses
Q22. Which method is labour-intensive?
[A]. Choosing customers solely through an online survey
[B]. Producing without either workers or equipment
[C]. Using mainly automated equipment and fewer workers
[D]. Using relatively more workers and less machinery
Q23. Which situation may favour capital-intensive production?
[A]. The legal prohibition of every machine
[B]. Affordable machinery suited to large-scale standardised output
[C]. A complete absence of technology and finance
[D]. A product requiring no tools of any kind
Q24. Why might customised designer garments continue to require skilled workers?
[A]. Every customised garment can be made without labour
[B]. Machines are always unavailable in garment production
[C]. The product’s nature has no effect on technique
[D]. Individual designs can need specialised judgment and manual work
Q25. Who makes the major production and allocation decisions in the planned-economy model described?
[A]. Only foreign visitors to the country
[B]. Each household deciding national output independently
[C]. Only individual consumers acting without institutions
[D]. A central planning authority
Class 9 Social Science Part 1 Chapter 8 MCQs Set 6
Q26. What mainly guides allocation in the market-economy model?
[A]. Demand and supply through private economic decisions
[B]. A single compulsory production target for every enterprise
[C]. Only the number of government employees
[D]. The complete absence of buying and selling
Q27. How can competition encourage producers to innovate?
[A]. It requires all firms to stop changing their methods
[B]. They seek to attract customers through improved products or efficiency
[C]. It guarantees that buyers must accept any product
[D]. It prevents consumers from comparing alternatives
Q28. Which situation best illustrates a mixed economy?
[A]. No individual or organisation may exchange goods
[B]. All public services and regulation are absent
[C]. Every economic decision is made only by one central authority
[D]. Private businesses operate alongside public enterprises and government regulation
Q29. What broad direction did India’s 1991 reforms take, as described in the chapter?
[A]. Greater scope for private enterprise and trade while retaining a government role
[B]. The permanent ending of international trade
[C]. The replacement of all markets with household barter
[D]. The abolition of every private enterprise
Q30. Why should crop choices consider water use as well as immediate profits?
[A]. Environmental effects never involve an economic trade-off
[B]. The most profitable crop always uses the least water
[C]. Present production decisions can affect future resources and well-being
[D]. Natural resources have no effect on agricultural choices
How to Solve Scarcity, Opportunity Cost and PPC Questions
- State the resource limit and the alternatives available.
- Identify the option chosen and the best alternative given up.
- For a production table, calculate the fall in the other product’s output.
- Explain the sacrifice in the correct units rather than confusing it with output gained.
- Check whether the available resources and technology are being treated as unchanged.
- Compare successive output changes to see whether the sacrifice remains constant or increases.
- Keep a feasible production combination separate from a judgement about which combination people prefer.
- Relate the choice to what, how or for whom to produce when discussing a business or economy.
Economic Choice and Production: Key Concepts
- What to produce concerns the goods, services and quantities selected.
- How to produce concerns techniques and combinations of inputs.
- For whom to produce concerns the people who receive or use the output.
- Efficient resource use still leaves choices because resources remain limited.
- Opportunity cost is the value of the best alternative forgone.
- A PPC shows efficient combinations of two outputs under given resource and technology conditions.
- Labour-intensive production relies relatively more on human work.
- A mixed economy combines private activity with public institutions and government involvement.
Use Opportunity Cost to Explain Real Decisions
The problem of choice remains even when resources are used efficiently. A student cannot devote the same hour fully to two different activities and a farmer using available land for one crop gives up another production opportunity. The PPC makes this relationship visible, but the explanation matters as much as the graph. When reviewing the wheat and barley example, calculate the reduction in wheat for each increase in barley and state the units clearly. Then consider how needs, costs and sustainability affect the preferred choice. This connects the chapter’s numerical work with its wider questions about production, resource allocation and the organisation of economic activity.
NCERT Solutions for Building Blocks in Economics: Practise Trade-offs
Work through NCERT Solutions for Class 9 Social Science Part 1 Chapter 8 to develop answers about scarcity, opportunity cost and production decisions. Begin with the alternatives in the question and identify the resource that limits them. When a table is provided, show how you obtain the sacrificed quantity instead of presenting only a final number. For questions about economic systems, compare who makes decisions and how resources are allocated. Reviewing these distinctions will help you apply the same basic reasoning to households, firms and government choices.
