A. Colored solid
B. Brittle
C. Hard
D. All of above
¨ Pure quartz is a colorless and transparent mineral that has a number of characteristic properties. The option that is not a property of pure quartz is (A) Coloured solid, since pure quartz is not colored.
¨ The other options are properties of pure quartz:
¨ B. Brittle: Pure quartz is a brittle material and can break or fracture easily if subjected to mechanical stress.
¨ C. Hard: Pure quartz is a hard mineral and has a Mohs hardness of 7, which is equivalent to that of steel. This means that it can scratch most other minerals, but can also be scratched by harder materials such as diamond.
¨ All of the above: This option is incorrect because pure quartz is not a colored solid.
¨ Therefore, the correct answer is (A) Coloured solid.
Submitted by :- Jamil Ahmed