NCERT Solutions for Class 12 Economics Chapter 1: Introduction

These Class 12 Economics Chapter 1 solutions cover Introduction, the opening chapter of the NCERT textbook Introductory Microeconomics for the 2026–27 session. The chapter explains the three central problems every economy faces because resources are scarce, introduces the production possibility frontier and the idea of opportunity cost, compares a centrally planned economy with a market economy, distinguishes positive from normative economic analysis, and separates the two great branches of the subject — microeconomics and macroeconomics. Below you get exam-ready, step-by-step answers to all 8 NCERT Exercises, plus key concepts, extra practice, MCQs, Assertion–Reason questions and FAQs.

Class: 12 Subject: Economics Book: Introductory Microeconomics Chapter: 1 Chapter Name: Introduction Session: 2026–27
On this page

Class 12 Economics Chapter 1 – Overview

Chapter 1, Introduction, builds the foundation of microeconomics. It begins with a simple economy in which every individual owns only a few resources and must exchange what she produces for the many goods and services she needs. Because resources are scarce relative to wants, every society must make choices, and this gives rise to the three central problems: what to produce, how to produce, and for whom to produce. The production possibility frontier (PPF) shows the maximum combinations of two goods an economy can produce when resources are fully and efficiently used, and the slope of the PPF measures opportunity cost. These problems can be solved through a centrally planned economy, a market economy, or — as in reality — a mixed economy. The chapter also distinguishes positive analysis (how a mechanism actually works) from normative analysis (how desirable it is), and the study of individual markets (microeconomics) from the study of the economy as a whole (macroeconomics).

Key Concepts & Terms

Scarcity: resources are limited in comparison to the unlimited wants of people; scarcity is the root cause of all economic problems and gives rise to the problem of choice.

Opportunity cost: the cost of a choice measured in terms of the next-best alternative forgone — the amount of one good that must be given up to obtain a little more of another good. It is also called the economic cost.

Allocation of resources: the decision of how much of each resource is devoted to the production of each good or service.

Central problems of an economy: (i) What to produce and in what quantities, (ii) How to produce (which technique — more labour or more machines), and (iii) For whom to produce (how output is distributed among individuals).

Production possibility set / frontier (PPF): the collection of all possible combinations of goods that can be produced from a given amount of resources and technology; the frontier shows the maximum of one good obtainable for any given amount of the other when resources are fully and efficiently used.

Centrally planned economy: the government or central authority plans all major decisions of production, exchange and consumption to achieve an allocation thought desirable for society.

Market economy: economic activities are organised through the market, where buyers and sellers freely exchange goods at mutually agreed prices; price signals coordinate millions of individual decisions.

Mixed economy: the real-world case where some important decisions are taken by the government while economic activity is largely conducted through the market.

Positive vs normative analysis: positive economics studies how a mechanism functions; normative economics evaluates whether the outcome is desirable.

Microeconomics vs macroeconomics: microeconomics studies individual agents and the prices and quantities in single markets; macroeconomics studies aggregates such as total output, employment and the general price level.

Key relationship — opportunity cost on a PPF: The slope of the production possibility frontier measures the opportunity cost. Using Table 1.1 (an economy producing corn or cotton): moving from possibility A (0 corn, 10 cotton) to E (4 corn, 0 cotton), gaining all 4 units of corn costs 10 units of cotton, so on average the opportunity cost of 1 unit of corn ≈ 10÷4 = 2.5 units of cotton. Because resources are not equally suited to both goods, this cost rises as more corn is produced (the PPF bows outward / is concave to the origin).

NCERT “Exercises” — Full Solutions

All questions below are reproduced verbatim from the NCERT textbook’s end-of-chapter Exercises section. Answers are original, written in exam-ready style.

1. Discuss the central problems of an economy.

ANSWER Because the resources of any economy are scarce in relation to unlimited human wants, every society must decide how to use those resources. The scarcity of resources gives rise to the problem of choice, summarised as three central problems: (i) What to produce and in what quantities? Every society must decide how much of each good and service to produce — for example, whether to produce more food, clothing and housing or more luxury goods; more agricultural goods or more industrial products; more consumption goods or more investment goods (like machines) that boost future production. (ii) How are these goods produced? Society must decide which resources and techniques to use — whether to use more labour or more machines, and which of the available technologies to adopt in producing each good. (iii) For whom are these goods produced? Society must decide how the output is distributed among individuals — who gets more and who gets less, and whether a minimum level of consumption, education and health is ensured for everyone. Thus, allocating scarce resources to the production of different goods and distributing the produced goods among individuals are the central problems of any economy.

2. What do you mean by the production possibilities of an economy?

ANSWER The resources of an economy are limited, but they have alternative uses — a given quantity of resources can be allocated in many different ways to produce different mixes of goods and services. Each allocation gives rise to a particular combination of goods. The production possibilities of an economy are all the different combinations of goods and services that it can produce from a given amount of resources and a given stock of technological knowledge. The complete collection of all such possible combinations is called the production possibility set of the economy. For example, an economy that can produce only corn and cotton may produce 0 corn and 10 cotton, or 4 corn and 0 cotton, or many intermediate combinations — each of these is one of its production possibilities.

3. What is a production possibility frontier?

ANSWER The production possibility frontier (PPF) is the curve that shows the various combinations of two goods an economy can produce when its resources are fully and efficiently utilised, given the available technology. It gives the maximum amount of one good that can be produced for any given amount of the other good (and vice versa). Any point on the frontier represents full and efficient use of resources; a point below the frontier means resources are underemployed or used wastefully; and a point above the frontier is not attainable with current resources and technology. Because using more resources for one good leaves fewer for the other, the PPF is downward sloping, and its slope reflects the opportunity cost of one good in terms of the other.

4. Discuss the subject matter of economics.

ANSWER Economics studies how a society uses its scarce resources to satisfy its unlimited wants. Production, exchange and consumption of goods and services are the basic economic activities, and in carrying them out every society faces scarcity, which forces it to make choices. The core subject matter centres on the two basic economic problems — the allocation of scarce resources among different goods and services, and the distribution of the goods produced among the individuals of the society. To analyse these, economists also study how the central problems can be solved (through a centrally planned economy, a market economy or a mixed economy), distinguish positive analysis (how a mechanism works) from normative analysis (how desirable it is), and divide the subject into two branches — microeconomics (individual agents and markets) and macroeconomics (the economy as a whole). The subject matter therefore covers how prices and quantities are determined and how the outcomes of different economic mechanisms can be evaluated.

5. Distinguish between a centrally planned economy and a market economy.

ANSWER The two systems differ in who decides the central problems and how those decisions are coordinated:
BasisCentrally Planned EconomyMarket Economy
Who decidesThe government / central authority plans all important activities.Decisions are made by individual buyers and sellers pursuing their own objectives.
CoordinationThrough a central plan and direct instructions.Through the free interaction of demand and supply — the price mechanism.
Role of pricesPrices may be fixed/administered by the authority.Prices are mutually agreed by buyers and sellers and act as signals guiding production.
Aim / criterionTo achieve an allocation and distribution thought desirable for society as a whole (e.g. equity, essential services).To pursue private gain; coordination emerges automatically from price signals.
ExampleChina for the major part of the twentieth century.The United States, where the role of government is minimal.
In reality, all economies are mixed economies that combine government decision-making with the market; they differ only in the extent of the government’s role.

6. What do you understand by positive economic analysis?

ANSWER Positive economic analysis studies how the different economic mechanisms actually function — it tries to figure out the outcomes that are likely to result under each mechanism, without judging whether those outcomes are good or bad. It deals with cause-and-effect statements that can, in principle, be verified by facts. For example, “if the demand for a good rises, its price will rise” is a positive statement, because it describes what happens rather than what ought to happen.

7. What do you understand by normative economic analysis?

ANSWER Normative economic analysis tries to evaluate the economic mechanisms — it studies whether the outcomes resulting from a mechanism are desirable or not for the economy as a whole. It involves value judgements about what ought to be. For example, “the government should provide free elementary education to everyone” is a normative statement. NCERT notes that the distinction between positive and normative analysis is not a sharp one, since the two are closely related and a proper understanding of one is not possible in isolation from the other.

8. Distinguish between microeconomics and macroeconomics.

ANSWER Economics is traditionally studied under two broad branches that differ in their level of study:
BasisMicroeconomicsMacroeconomics
MeaningStudies the behaviour of individual economic agents in the markets for different goods and services.Studies the economy as a whole.
FocusHow prices and quantities of individual goods are determined through the interaction of buyers and sellers.Aggregate measures such as total output, employment and the general (aggregate) price level.
Key questionsHow is the price of a single commodity fixed? How does a consumer or firm behave?What is the level of total output? Are resources fully employed? Why do prices rise?
Also calledPrice theory.Income and employment theory.

Extra Practice Questions

Short Answer Type Questions

Q1. What is the root cause of all economic problems?

ANSWERThe root cause is the scarcity of resources relative to unlimited human wants. Because resources are limited and have alternative uses, every society is forced to make choices about how to use them — and this problem of choice gives rise to all economic problems.

Q2. Define opportunity cost with an example.

ANSWEROpportunity cost is the value of the next-best alternative forgone when a choice is made — the amount of one good that must be given up to get a little more of another. For example, if an economy uses resources to produce one more unit of corn and thereby produces some units of cotton less, those units of cotton forgone are the opportunity cost of that unit of corn.

Q3. Why is the production possibility frontier downward sloping?

ANSWERThe PPF is downward sloping because resources are scarce and fully employed: to produce more of one good, resources must be shifted away from the other good, so its output falls. Having more of one good is possible only by giving up some of the other, which is why the curve slopes downward.

Q4. What is a mixed economy?

ANSWERA mixed economy is one in which some important decisions are taken by the government while economic activity is, by and large, conducted through the market. In reality all economies are mixed; they differ only in the extent of the government’s role — large in India since Independence, minimal in the United States.

Q5. State whether each is a positive or a normative statement: (a) A rise in income tax reduces disposable income. (b) The poor should be exempt from income tax.

ANSWER(a) is a positive statement, because it describes a verifiable cause-and-effect relationship. (b) is a normative statement, because it expresses a value judgement about what ought to be done.

Long Answer Type Questions

Q1. Explain how the price mechanism solves the central problems in a market economy.

ANSWERIn a market economy all economic activities are organised through the market, where buyers and sellers freely exchange goods at mutually agreed prices. The price reflects, on average, the society’s valuation of a good. What and how much to produce is decided by demand: if buyers demand more of a good, its price rises, signalling producers that society wants more of it, so they increase production; if demand falls, the price falls and resources move elsewhere. How to produce is decided by the prices of inputs: producers choose the cheapest efficient combination of labour and machines to maximise profit. For whom to produce is decided by purchasing power: those who can pay the price get the goods. In this way the price signals coordinate the decisions of millions of isolated individuals automatically, without any central authority, bringing order to the system instead of chaos.

Q2. Using a production possibility schedule, explain the concepts of opportunity cost and efficient use of resources.

ANSWERConsider an economy that can produce corn or cotton, as in the textbook’s Table 1.1:
PossibilityCornCotton
A010
B19
C27
D34
E40
Each combination uses the economy’s resources fully and efficiently, so it lies on the production possibility frontier. To produce the 1st unit of corn (A to B), 1 unit of cotton is forgone; the 2nd unit (B to C) costs 2 cotton; the 3rd (C to D) costs 3 cotton; and the 4th (D to E) costs 4 cotton. The cotton given up each time is the opportunity cost of the extra corn, and it rises as more corn is produced — this is why the PPF bows outward (is concave to the origin). Any point below the curve (say 1 corn and 5 cotton) means resources are underemployed or wasted; producing on the curve represents the efficient use of resources, where more of one good can be had only by sacrificing some of the other.

Q3. Compare microeconomics and macroeconomics and explain why both are needed to understand an economy.

ANSWERMicroeconomics studies the behaviour of individual economic agents — consumers and producers — and analyses how the price and quantity of a single commodity are determined in its market. It answers questions such as how a firm decides its output or how the price of one good is fixed. Macroeconomics, by contrast, looks at the economy as a whole and focuses on aggregate measures such as total output, employment and the general price level; it asks how total output is determined, whether resources like labour are fully employed, and why prices rise. The two are complementary: micro-level decisions of countless individuals add up to the macro outcomes, while macro conditions (such as overall employment and the price level) shape the environment within which individuals make their micro decisions. Therefore, a complete understanding of an economy requires both branches — the “trees” studied by microeconomics and the “forest” studied by macroeconomics.

MCQs & Assertion–Reason

1. The root cause of all economic problems is:

(a) inflation    (b) scarcity of resources    (c) unemployment    (d) low income

2. “For whom to produce” is a problem of:

(a) allocation of resources    (b) choice of technique    (c) distribution of output    (d) full employment

3. A point lying strictly below the production possibility frontier indicates that resources are:

(a) fully and efficiently used    (b) underemployed or wasted    (c) unattainable    (d) increasing

4. The slope of the production possibility frontier measures the:

(a) marginal utility    (b) opportunity cost    (c) average cost    (d) total output

5. In a market economy, the central problems are solved mainly through:

(a) a central plan    (b) the price mechanism    (c) government orders    (d) rationing

6. “The government should provide free healthcare to all” is an example of a:

(a) positive statement    (b) normative statement    (c) micro statement    (d) macro statement

7. The study of the determination of the price of a single commodity belongs to:

(a) macroeconomics    (b) microeconomics    (c) normative economics    (d) development economics

8. Total output, employment and the aggregate price level are studied in:

(a) microeconomics    (b) price theory    (c) macroeconomics    (d) positive analysis

9. The closest example of a centrally planned economy for the major part of the twentieth century was:

(a) the USA    (b) India    (c) China    (d) Japan

10. In the textbook’s example, if all resources are used to produce cotton, the maximum cotton obtainable is:

(a) 4 units    (b) 7 units    (c) 9 units    (d) 10 units

Answer key: 1-(b), 2-(c), 3-(b), 4-(b), 5-(b), 6-(b), 7-(b), 8-(c), 9-(c), 10-(d).

For each Assertion–Reason question, choose: (A) Both true and the Reason correctly explains the Assertion; (B) Both true but the Reason is not the correct explanation; (C) Assertion true, Reason false; (D) Assertion false, Reason true.

A-R 1. Assertion: Every economy faces the problem of choice.

Reason: The resources of an economy are scarce relative to unlimited human wants.

A-R 2. Assertion: The production possibility frontier is downward sloping.

Reason: To produce more of one good, resources must be withdrawn from the production of the other good.

A-R 3. Assertion: A positive statement always describes what ought to be.

Reason: Positive economic analysis evaluates whether an outcome is desirable.

A-R 4. Assertion: In a market economy, prices act as signals that coordinate the decisions of individuals.

Reason: A rise in the price of a good signals producers that society wants more of it, so they increase its production.

A-R 5. Assertion: Microeconomics and macroeconomics study the economy at the same level.

Reason: Microeconomics studies individual markets, while macroeconomics studies aggregate measures of the whole economy.

Answer key: 1-(A), 2-(A), 3-(D), 4-(A), 5-(D).

Exam Tips & Common Mistakes

How to score full marks in this chapter

Memorise the three central problems in the exact order — what, how, for whom — and give a one-line example for each. For PPF questions, always state both conditions: resources fully and efficiently used. Link the slope of the PPF to opportunity cost, and remember it rises as you move along the curve (so the PPF is concave to the origin). Present comparison questions (centrally planned vs market; micro vs macro; positive vs normative) as neat two-column tables with a basis, definition and example. Keep one verifiable example for a positive statement and one “should/ought” example for a normative statement ready.

Common mistakes to avoid

  • Confusing positive (what is, verifiable) with normative (what ought to be, value judgement).
  • Saying the PPF is a straight line by default — it is usually concave because opportunity cost increases.
  • Treating points below the PPF as efficient — they show underemployed or wasted resources.
  • Mixing up microeconomics (individual markets/price theory) with macroeconomics (aggregates/income theory).
  • Forgetting that real economies are mixed, not purely planned or purely market.
  • Listing only two central problems — always give all three (what, how, for whom).

Frequently Asked Questions

What is Chapter 1 of Class 12 Introductory Microeconomics about?

Chapter 1, Introduction, explains why every economy faces the central problems of what, how and for whom to produce, introduces the production possibility frontier and opportunity cost, compares centrally planned and market economies, distinguishes positive from normative analysis, and separates microeconomics from macroeconomics.

What are the three central problems of an economy?

The three central problems are: (i) what to produce and in what quantities, (ii) how to produce — which technique or combination of resources to use, and (iii) for whom to produce — how the output is distributed among individuals. They arise because resources are scarce relative to wants.

How many questions are in the NCERT exercise of Class 12 Economics Chapter 1?

The end-of-chapter Exercises section of Introductory Microeconomics Chapter 1 contains 8 questions, all reproduced verbatim and answered step by step on this page.

← Introductory Microeconomics (all chapters) Chapter 2 →
Scroll to Top