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Question (21)

QN0037641

Which of the following is a major copper-producing area mentioned in the chapter?

(A) Balaghat
(B) Raniganj
(C) Neyveli
(D) Digboi

Correct Answer: A

Explanation:

Balaghat, Khetri and Singhbhum are important copper-producing areas.

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Question (22)

QN0037642

Aluminium is obtained from:

(A) Bauxite
(B) Mica
(C) Limestone
(D) Manganese

Correct Answer: A

Explanation:

Aluminium is obtained from bauxite.

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Question (23)

QN0037643

If Odisha produces 65% of a total 20 million tonnes of bauxite, how much does Odisha produce?

(A) 10 million tonnes
(B) 11 million tonnes
(C) 13 million tonnes
(D) 15 million tonnes

Correct Answer: C

Explanation:

Odisha production = 65/100 × 20 = 13 million tonnes.

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Question (24)

QN0037644

According to the figure in the chapter, if Odisha accounts for 65% of bauxite production, what percentage is produced by all other states together?

(A) 25%
(B) 30%
(C) 35%
(D) 40%

Correct Answer: C

Explanation:

Other states = 100% − 65% = 35%.

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Question (25)

QN0037645

Which property of mica makes it especially useful in electrical and electronic industries?

(A) High moisture content
(B) Excellent dielectric strength and insulating properties
(C) Very high weight
(D) Poor resistance to electricity

Correct Answer: B

Explanation:

Mica has excellent dielectric strength, low power loss and high resistance to electricity.

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Question (26)

QN0037646

Limestone is an important raw material for:

(A) Cement production and smelting iron ore
(B) Petroleum refining only
(C) Nuclear energy production
(D) Wind energy generation

Correct Answer: A

Explanation:

Limestone is essential for cement manufacturing and for smelting iron ore in blast furnaces.

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Question (27)

QN0037647

Which of the following is a major hazard associated with mining?

(A) Pulmonary diseases caused by dust and fumes
(B) Increased soil fertility
(C) Reduced water contamination
(D) Increased forest cover

Correct Answer: A

Explanation:

Mining can cause pulmonary diseases due to prolonged exposure to dust and fumes.

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Question (28)

QN0037648

A mining operation produces 4 tonnes of waste for every 1 tonne of useful mineral. If 500 tonnes of useful mineral are obtained, how much waste is produced?

(A) 500 tonnes
(B) 1,000 tonnes
(C) 1,500 tonnes
(D) 2,000 tonnes

Correct Answer: D

Explanation:

Waste = 4 × 500 = 2,000 tonnes.

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Question (29)

QN0037649

Why does extraction of minerals from greater depths generally become less economical?

(A) Minerals become renewable
(B) Extraction costs increase with depth
(C) Minerals become more abundant
(D) Transportation becomes unnecessary

Correct Answer: B

Explanation:

Extraction from greater depths increases costs and may also reduce the quality of deposits.

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Question (30)

QN0037650

If 30 tonnes of metal are recycled from 100 tonnes of used metal, what percentage is recycled?

(A) 10%
(B) 20%
(C) 30%
(D) 40%

Correct Answer: C

Explanation:

Recycling percentage = (30/100) × 100 = 30%.

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Question (21)

Which of the following is a major copper-producing area mentioned in the chapter?

Explanation:

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Question (22)

Aluminium is obtained from:

Explanation:

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Question (23)

If Odisha produces 65% of a total 20 million tonnes of bauxite, how much does Odisha produce?

Explanation:

Link:

Question (24)

According to the figure in the chapter, if Odisha accounts for 65% of bauxite production, what percentage is produced by all other states together?

Explanation:

Link:

Question (25)

Which property of mica makes it especially useful in electrical and electronic industries?

Explanation:

Link:

Question (26)

Limestone is an important raw material for:

Explanation:

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Question (27)

Which of the following is a major hazard associated with mining?

Explanation:

Link:

Question (28)

A mining operation produces 4 tonnes of waste for every 1 tonne of useful mineral. If 500 tonnes of useful mineral are obtained, how much waste is produced?

Explanation:

Link:

Question (29)

Why does extraction of minerals from greater depths generally become less economical?

Explanation:

Link:

Question (30)

If 30 tonnes of metal are recycled from 100 tonnes of used metal, what percentage is recycled?

Explanation:

Link:

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