Arrange the following substances in their order of increasing hardness :
- Gypsum
- Topaz
- Fluorite
- Feldspar
Select the correct answer using the code given below :
[amp_mcq option1=”4-3-2-1″ option2=”1-3-4-2″ option3=”3-4-2-1″ option4=”1-4-3-2″ correct=”option2″]
This question was previously asked in
UPSC CAPF – 2016
– The Mohs scale values for the given substances are:
– Gypsum: Mohs Hardness = 2
– Topaz: Mohs Hardness = 8
– Fluorite: Mohs Hardness = 4
– Feldspar (usually Orthoclase): Mohs Hardness = 6
– Arranging these substances in order of increasing hardness (from softest to hardest):
1. Gypsum (2)
2. Fluorite (4)
3. Feldspar (6)
4. Topaz (8)
– The correct order using the list numbers is 1-3-4-2.