Read the statements carefully and choose the correct option: Assertion (A): Aluminium smelting is the most important metallurgical industry in India. Reason (R): Aluminium is used in the manufacture of aircraft, wires, and utensils.
- (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 — D. A is false. NCERT's Class 10 geography calls aluminium smelting the second most important metallurgical industry in India. Iron and steel is the basic industry the others depend on.
R is true. Aluminium is light, resists corrosion and conducts heat well, and NCERT lists aircraft, utensils and wires among its uses.
A false, R true → option (d).
Why the others are wrong
- (a)Both A and R are true, and R is the correct explanation of A — A is false, so (a) cannot stand. NCERT ranks aluminium smelting second among India's metallurgical industries, behind iron and steel.
- (b)Both A and R are true, but R is not the correct explanation of A — A is false, so no both-true option works. NCERT says second most important, not the most important.
- (c)A is true, but R is false — R is true and A is the false one. This option reverses them: aluminium really is used for aircraft, wires and utensils.
Concept
Metallurgical industries turn mineral ores into metals. NCERT's Class 10 chapter Manufacturing Industries treats iron and steel as the basic industry, since heavy, medium and light industries all depend on it for machinery.
Aluminium smelting comes second. Its raw material is bauxite, a bulky, dark reddish rock. Plants need a regular supply of electricity and an assured source of cheap raw material.
The item turns on one word: most where NCERT says second most.
Key facts
- NCERT calls aluminium smelting the second most important metallurgical industry in India.
- Iron and steel is the basic industry, since all other industries depend on it for machinery.
- Bauxite is the raw material used in aluminium smelters.
- Regular electricity and an assured source of cheap raw material are the prime factors in locating an aluminium plant.
Study next
Common traps
- Accepting most important because aluminium is so widely used: NCERT ranks it second, after iron and steel.
- Marking (a) because R sounds like a reason: once A is false, whether R explains it does not arise.
NCERT's industry chapter also appears at 14 Sep 2025, 09:00, GA Q.21, where aluminium smelting is a basic industry set against the keyed consumer good, toothpaste.
Related PYQs
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