Question

Which one of the following is a secondary mineral?

• A. Olivine
• B. Hornblende
• C. Micas
• D. Zircon

Hint:

Primary minerals: Olivine, Hornblende, Feldspar.
Secondary minerals: Clay minerals, Micas, Iron oxides.
Secondary minerals form from weathering of primary minerals.

Answer 1

The Correct Option is C

Step 1: Understanding the Question:
This question tests knowledge of primary and secondary minerals in soils.

Step 2: Detailed Explanation:
Micas (C) are secondary minerals.
Secondary minerals are formed from the weathering of primary minerals.
Examples: Clay minerals, micas, iron oxides.
Other options:
- Olivine (A): Primary mineral (found in igneous rocks).
- Hornblende (B): Primary mineral (ferromagnesian silicate).
- Zircon (D): Primary mineral (resistant to weathering).
Thus, micas are secondary minerals.

Step 3: Final Answer:
Thus, micas are secondary minerals, which corresponds to option (C).
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