NCERT Class 9 Social Science Understanding Society India and Beyond PART-I: Chapter 9 — === page_21 (layout_surya) ===
This chapter, 'The Price Puzzle: What Drives the Market,' from NCERT Class 9 Social Science (Understanding Society: India and Beyond PART-I), delves into the fundamental economic concepts of demand and supply. It explains how these two forces interact to determine the prices of goods and services. The chapter begins by posing relatable questions about price fluctuations, such as why mangoes become cheaper or flight tickets vary in cost. It defines demand as the quantity of a product consumers are willing and able to buy at a specific price, emphasizing that it's more than just a desire. The Law of Demand is introduced, illustrating the inverse relationship between price and quantity demanded. The concept of individual demand is explained through Srivalli's mango purchasing habits, presented in a demand schedule and graphically as a demand curve. This chapter aims to equip students with an understanding of market dynamics and price determination.
Quick info
| Board | CBSE / NCERT |
|---|---|
| Class | Class 9 |
| Subject | Social Science |
| Book | Understanding Society India and Beyond PART-I |
| Chapter | Chapter 9 — === page_21 (layout_surya) === |
| Language | English |
| PDF type | NCERT Textbook |
| Session | CBSE 2026 |
| Reading time | 4 minutes |
| Word count | 623 |
Learning outcomes
- Identify factors influencing demand and supply in a market.
- Explain how prices are determined by the interaction of demand and supply.
- Define and illustrate the Law of Demand.
- Understand the concepts of individual demand schedule and demand curve.
Vocabulary
| Word | Meaning |
|---|---|
| Demand | The quantity of a product that people are willing and able to buy at a particular price. |
| Purchasing power | A measure of how much one unit of a particular currency can buy at a particular time. |
| Law of Demand | Highlights the inverse relationship between the price of a product or service and its quantity demanded. |
| Individual demand | The quantity of a good or service that an individual consumer wants to buy at different prices, keeping other factors constant. |
| Demand schedule | A table showing the quantity of a good or service demanded at different prices. |
| Demand curve | A graphical representation of the demand schedule. |
The complete chapter text is read in the official NCERT PDF viewer below (streamed from ncert.nic.in). This page provides NCERT Help study material — summary, vocabulary, practice questions, and FAQs — not a full reproduction of the textbook.
Read chapter online
This PDF is loaded from the official NCERT website (ncert.nic.in). Use the page buttons below to read — download is disabled on NCERT Help.
Read page by page below. PDF is streamed from the official NCERT website — no download button on this page.
Practice questions
- What is demand for a product? Answer: Demand is the quantity of a product that people are willing and able to buy at a particular price, depending on their needs, preferences, season, trend, and income.
- State the Law of Demand. Answer: The Law of Demand states that as the price of any product rises, the quantity demanded decreases, and when the price falls, the quantity demanded increases.
- What is the difference between desire and demand? Answer: Demand is not just the desire to buy something; it is the willingness complemented by the ability or purchasing power to buy it.
- What does a demand schedule represent? Answer: A demand schedule is a table that shows the quantity of a good or service that an individual consumer wants to buy at different prices, keeping other factors constant.
Frequently asked questions
What are the main forces that determine the prices of goods and services?
The prices of all goods and services are determined by two powerful forces: demand and supply.
What is the relationship between price and quantity demanded according to the Law of Demand?
The Law of Demand highlights the inverse relationship between the price of a product or service and its quantity demanded; as price rises, quantity demanded decreases, and vice versa.
What is purchasing power?
Purchasing power is a measure of how much one unit of a particular currency can buy at a particular time.
What is the difference between a demand schedule and a demand curve?
A demand schedule is a table showing quantities demanded at different prices, while a demand curve is the graphical representation of this schedule.
Why do prices change in a market?
Prices change due to various factors including what people want, how much is available, seasons, festivals, trends, and sometimes even rumors, all of which influence demand and supply.
Related resources
Important topics
Topics covered
NCERT Class 9 Social Science — Understanding Society India and Beyond PART-I — Chapter 9 — === page_21 (layout_surya) ===. Verified by NCERT Help Editorial Team. Reviewed on 29 Jul 2026. Last updated 10 Aug 2026.