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| 1. |
Sapphire is a mineral of : (a) Cu (b) Al (c) Hg (d) Zn |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (b) Al </strong></span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Explanation:</strong></span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">Sapphire is a natural crystalline form of blue, transparent corundum (Al<sub>2</sub>O<sub>3</sub>), the colour being due to traces of cobalt and other metals.</span></span></p> | |