Read the following statements carefully and choose the correct option: Assertion (A): Iron and steel is considered a heavy industry. Reason (R): It requires lightweight raw materials like cotton and rubber.
- (a)Both A and R are true, and R is the correct explanation of A
- (b)Both A and R are true, but R is not the correct explanation of A
- (c)A is true, but R is false
- (d)A is false, but R is true
Answer
Why
Correct — C. Assertion is true. NCERT names iron and steel as its example of heavy industry, because "all the raw materials as well as finished goods are heavy and bulky".
Reason is false. Its raw materials are iron ore, coking coal and limestone, needed in a ratio of about 4 : 2 : 1. Cotton and rubber are light, agro-based raw materials.
Why the others are wrong
- (a)Both A and R are true, and R is the correct explanation of A — R is false, so it cannot explain A. Iron and steel runs on heavy, bulky iron ore, coking coal and limestone, not on cotton and rubber.
- (b)Both A and R are true, but R is not the correct explanation of A — "Both true" fails at R. NCERT lists cotton and rubber among agro-based industries' raw materials, and neither has any role in making iron and steel.
- (d)A is false, but R is true — A is NCERT's own example. Its classification by bulk and weight lists "heavy industries such as iron and steel", so calling A false contradicts the textbook.
Concept
NCERT classifies industries in several ways. By the bulk and weight of raw material and finished goods, iron and steel is heavy while electrical goods are light.
By source of raw material, iron and steel is mineral-based, while cotton, jute, rubber and sugar industries are agro-based.
Iron and steel is also a basic industry: all other industries, heavy, medium and light, depend on it for their machinery.
Key facts
- NCERT: iron and steel is a heavy industry because its raw materials and finished goods are heavy and bulky, entailing heavy transport costs.
- Iron ore, coking coal and limestone are required in the ratio of about 4 : 2 : 1, with some manganese to harden the steel.
- NCERT lists cotton and rubber among agro-based industries.
- Iron and steel is a basic industry because other industries depend on it for their machinery.
Study next
Common traps
- Choosing "both true" because R sounds like an explanation — first test whether R is true at all.
- Mixing up heavy and light (bulk of materials) with basic and consumer (role in the economy).
The same NCERT classifications decide 15 Sep 2025, 16:00, GA Q.21 (cotton textiles and sugar as agro-based industries) and 14 Sep 2025, 09:00, GA Q.21 (toothpaste, not iron and steel, as a consumer goods industry).
Related PYQs
No directly related past PYQ was found.