Which mineral is the hardest on the Mohs scale? MCQ with Answer and Explanation

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Which mineral is the hardest on the Mohs scale?

A. Quartz

B. Diamond

C. Topaz

D. Corundum

Answer: Option B

Solution (By JKSSB Mock Tests)

Diamond has a hardness of 10 on the Mohs scale, making it the hardest naturally occurring mineral.

This question belongs to: Geography GK Physical Geography

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Practice More Physical Geography Questions

Question #1

Obsidian is a type of:

A. Sedimentary Rock

B. Volcanic Glass

C. Metamorphic Rock

D. Organic Rock

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Correct Answer: Option B

Explanation:
Obsidian forms when lava cools very rapidly, preventing crystal formation and creating natural volcanic glass.

This question belongs to: Geography GK Physical Geography

Question #2

Which ocean is the smallest in the world?

A. Arctic Ocean

B. Southern Ocean

C. Atlantic Ocean

D. Indian Ocean

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Correct Answer: Option A

Explanation:
The Arctic Ocean is the smallest and shallowest ocean on Earth.

This question belongs to: Geography GK Physical Geography

Question #3

The outermost solid layer of the Earth is known as:

A. Core

B. Crust

C. Asthenosphere

D. Mantle

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Correct Answer: Option B

Explanation:
The crust is the Earth's outermost solid layer. It is thinner beneath oceans and thicker beneath continents.

This question belongs to: Geography GK Physical Geography

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