Question

Which of the following minerals exhibits the highest hardness on the Mohs scale?

• A. Talc
• B. Gypsum
• C. Quartz
• D. Diamond

Hint:

On the Mohs scale, Diamond (10) is the hardest mineral, while Talc (1) is the softest. Always remember: higher number = greater hardness.

Answer 1

The Correct Option is D

Concept: The Mohs scale of hardness is a qualitative scale used to measure the scratch resistance of minerals. It ranges from 1 (softest) to 10 (hardest). Each mineral can scratch those below it and is scratched by those above it. The standard Mohs hardness values are:

• Talc = 1 (softest)
• Gypsum = 2
• Quartz = 7
• Diamond = 10 (hardest)

Step 1:Compare the hardness values of the given minerals.
Among the given options:

• Talc is the softest mineral.
• Gypsum is slightly harder than talc.
• Quartz has relatively high hardness.
• Diamond has the maximum hardness on the Mohs scale.

Step 2:Identify the mineral with the highest hardness.
Since Diamond has a hardness of 10, it is the hardest known natural mineral.