NCERT Solutions for Class 9th Social Science Chapter 8 The chapter's recap points, with the evidence behind each — Before we move on…

Book page 193 Updated on2026-09-08

Q1.

Economics deals with how individuals and societies make choices to use limited resources to satisfy unlimited wants. Every choice involves an opportunity cost—giving up one option for another.

Answer

The recap point holds together only if each of its four terms is anchored in something the chapter actually showed. Take them in order.

Term	Where the chapter grounds it
Unlimited wants	Fig. 8.1 separates needs from wants; the text adds that wants “keep changing” — bicycle → motorbike → car
Limited resources	Resources are “limited in quantity” and have alternative uses — Fig. 8.2 shows the same steel going into medical equipment, aircraft or refrigerators
Choice	The farmer with one piece of land must decide how much barley and how much wheat; the government must decide between highways and hospitals
Opportunity cost	“When one alternative is chosen, the other options are given up. The value of what is given up is known as the opportunity cost.”

The farmer's table is the proof, and the arithmetic is worth doing. Using only the five combinations printed on page 185:

Move	Barley gained (kg)	Wheat given up (kg)	Opportunity cost per extra kg of barley
A (0, 100) → B (25, 90)	25	10	10 ÷ 25 = 0.4 kg wheat
B (25, 90) → C (50, 70)	25	20	20 ÷ 25 = 0.8 kg wheat
C (50, 70) → D (75, 40)	25	30	30 ÷ 25 = 1.2 kg wheat
D (75, 40) → E (100, 0)	25	40	40 ÷ 25 = 1.6 kg wheat
A → E in total	100	100	100 ÷ 100 = 1.0 kg wheat on average

Why the cost rises at every step: the farmer shifts the land, water and labour that suit wheat best to barley first. Those early shifts cost little wheat. As more barley is grown, the land being converted is land that was good for wheat and poor for barley — so each further 25 kg of barley costs more and more wheat: 10, then 20, then 30, then 40. That rising cost is exactly why the curve in Fig. 8.3 bows outward instead of being a straight line. On a straight line from A to E the farmer at 50 kg of barley would have 50 kg of wheat; the book's combination C gives 70 kg, which is 20 kg more, and that gap is the concavity.

Q2.

Every economy faces three central questions—what to produce, how to produce, and for whom to produce—to decide how best to use scarce resources.

Answer

The three questions are not a list of topics; they are the three decisions that scarcity leaves unavoidable. Fig. 8.5 shows the chain: unlimited wants and limited resources give scarcity, scarcity forces choices, and choices split into these three.

Question	What it decides	The chapter's worked example
What to produce	Which goods and services, and in what quantities, over a given period	Water-intensive sugarcane and paddy, or drought-resistant millets and pulses — profits and sugar industry on one side, saved water and improved soil health on the other
How to produce	Which methods, resources and technologies — the mix of land, labour, capital and technology	A garment manufacturer choosing labour-intensive or capital-intensive methods, depending on the cost of machines, the technology available, the nature of the product, the cost of labour, and the law
For whom to produce	The purpose of what is made, how it is distributed, and who benefits	School, office-wear, sports and casual shoes for four different groups — with leather for office-goers and high-income customers, rubber or synthetic for sports players and factory workers

Why “every economy” is literally true: the questions arise from scarcity, not from any particular system, so a rich country faces them as much as a poor one and a household as much as a nation. What changes between economies is only who answers them — a planning authority, market forces, or both together. That is the bridge from this recap point to the next one.

Q3.

Different systems answer these questions differently: market economies rely on private decisions and demand and supply whereas, planned economies depend on government control, and mixed economies combine both.

Answer

The difference between the three systems is the location of decision-making power, and everything else follows from it.

	Planned	Market	Mixed
Who answers the three questions	A central planning authority of the government	The forces of demand and supply	Private individuals, enterprises and the government together
Ownership	Government owns most resources and sectors	Individuals and private companies	Private ownership with government regulation, plus large public sector companies
Consequence the chapter draws	Restricted competition, so “little motivation among enterprises to improve quality or innovate”	Many producers offering similar products, so better quality, lower prices and innovation	The market's innovation and competition, with the government's fair competition rules, consumer protection, transparency, public goods and welfare programmes

The chapter's larger claim is that these are not three separate worlds. It says of market economies that “governments play an important role even in these economies”, and of mixed economies that “almost all economies are mixed.” India is the chapter's own illustration of movement along that scale — state-led after Independence, then shifted by the 1991 reforms towards a more market-oriented system “while still retaining an important role for the government.”

Tip: when an examination question names a country, say which features of which system it shows rather than labelling it with one word. The chapter's examples make this easy: former Soviet Union, North Korea and Cuba for planned; USA, Japan and Hong Kong for market; India (post-1991), China (post-1978), Germany and Sweden for mixed — with the USA and Singapore named as market economies that nonetheless have significant government involvement.

Was this helpful? Report an error