Chemistry
Assertion (A): Diamond and graphite are crystalline allotropes of carbon.
Reason (R): Both diamond and graphite are good conductors of electricity and are used as gems.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Carbon
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Answer
A is true but R is false.
Explanation — A is true as diamond and graphite are crystalline allotropes of carbon. R is false as diamond is a bad conductor of electricity because it has no free or mobile electrons, but it is used for making gems. Graphite is a good conductor of electricity, but it is not used for making gems.
Therefore, A is true but R is false is the correct option.
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