Question

Arrange the following minerals in decreasing order of their hardness as per Mohs scale.
A. Orthoclase
B. Calcite
C. Corundum
D. Fluorite

• A. A, B, C, D
• B. A, C, B, D
• C. C, A, D, B
• D. C, B, D, A

Hint:

A common mnemonic for the Mohs scale is: "Tall Girls Can Find Alligators Or Queens Through Careful Digging." (1-Talc, 2-Gypsum, 3-Calcite, 4-Fluorite, 5-Apatite, 6-Orthoclase, 7-Quartz, 8-Topaz, 9-Corundum, 10-Diamond)

Answer 1

The Correct Option is C

Step 1: Recall the hardness values of the given minerals on the Mohs scale. - Corundum (C): 9 - Orthoclase (A): 6 - Fluorite (D): 4 - Calcite (B): 3

Step 2: Arrange these minerals in decreasing order of hardness. The order from hardest to softest is: 1. Corundum (9) 2. Orthoclase (6) 3. Fluorite (4) 4. Calcite (3)

Step 3: Write the final sequence using the letters. The sequence is C, A, D, B.