Samacheer Kalvi 12th Economics Book Back Answers: All 12 Chapters
Class 12 Economics has twelve chapters, and every one of them has twenty book back MCQs, so the question bank is large and evenly spread. The questions mix definitions, economists and their contributions, dates of institutions, and a small number of calculations. This page brings the answers for all twelve chapters together, each with an explanation.
All 12 chapters of 12th Economics
Each chapter also has additional MCQs and a timed practice test on the 12th Economics chapter list.
Three kinds of question to prepare for
- Concepts and definitions. Stock versus flow, NNP at factor cost, disguised unemployment, cost-push inflation, repo rate, fiscal deficit. These are the majority.
- People, institutions and dates. Who coined "macro", who wrote the General Theory, when NABARD was set up, where the IMF is headquartered. Our economists, institutions and dates list puts these on one page.
- Short calculations. Mostly in Consumption and Investment Functions and in Econometrics: consumption from a consumption function, APC, MPC and the multiplier, and reading an intercept.
The calculations, worked once
Take the consumption function C = 10 + 0.8Y:
- MPC is the coefficient of Y, so MPC = 0.8.
- Consumption at Y = 1000 is 10 + 0.8 × 1000 = 810.
- APC at Y = 100: C = 10 + 80 = 90, so APC = C/Y = 90/100 = 0.9.
- Multiplier = 1/(1 − MPC) = 1/MPS. With MPC = 0.5 the multiplier is 2, and with MPC = 0.8 it is 5.
- MPC + MPS = 1, because every extra rupee of income is either consumed or saved.
In a regression line such as Y = 2 − 0.2X, the intercept is 2 and the slope is −0.2.
Common traps in 12th Economics MCQs
- GNP versus GDP. GNP = GDP + net factor income from abroad. Among the national income aggregates, GNP is the largest.
- Stock versus flow. A quantity measured at a point of time is a stock; income, measured over a period, is a flow.
- Who gains from inflation. Debtors gain, because they repay with money that is worth less.
- Disinflation is not deflation. Disinflation is a fall in the rate of inflation. Prices still rise, just more slowly.
- Fiscal deficit. It does not count borrowing as a receipt, and that is exactly what the "which deficit" question tests.
- Conversion of public debt. The idea is to replace high-interest loans with low-interest ones. Read the option wording carefully, because it is easy to reverse.
Where to practise
Group the chapters to revise faster
Twelve chapters feel like a lot, but they fall into four families. Revising a family together makes the links between ideas visible, and those links are what the trickier options test.
- Macro foundations (Units 1–4). Aggregates, national income, the classical and Keynesian theories, and the consumption function. Keynes connects all four: effective demand in Unit 3 leads directly to the multiplier in Unit 4.
- Money and banking (Units 5–6). Inflation, the quantity theory, commercial banks and the RBI's credit control tools.
- The world economy (Units 7–8). Trade theory, the balance of payments and exchange rates, followed by the IMF, World Bank, WTO and the regional groups.
- Government, environment and development (Units 9–12). Taxes, budgets and deficits, environmental economics, planning in India, and finally the statistics and econometrics tools.
Within each family, learn the definitions first, then the people and dates, then do the chapter's book back questions under a timer.
With twenty questions per chapter, timed practice pays off. Take one chapter test a day on the Class 12 Economics section, and keep a single page of the definitions and dates you miss.