Q. Which test is used to determine the hardness of substance?

A
DAST
B
Purity Analyzer
C
Mohs Hardness Scale
D
None of these
Solution:

The Mohs scale of mineral hardness is a qualitative ordinal scale characterizing scratch resistance of various minerals through the ability of harder material to scratch softer material. Created in 1812 by German geologist and mineralogist Friedrich Mohs.

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