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Assertion (A) : Graphite is an example o...

Assertion (A) : Graphite is an example of tetragonal crystal system.
Reason (R ) : For a tetragonal system, `a = b != c` and `alpha = beta = 90^(@), gamma = 120^(@)`.

A

if both Assertion and Reason are true and reason is the correct explanation of the assertion.

B

if both assertion and reason are true but reason is not the correct expalanation of the assertion

C

if assertion is true, reason is false

D

both assertion and reason are false statements.

Text Solution

Verified by Experts

The correct Answer is:
d
Graphite has a two dimensional sheet structure. Each C-atom is in `sp^(2)` hybridised state and is linked to three other carbon atoms in a hexagonal planar structure.
For a tetragonal system `a=b ne, c alpha= beta=90^(@)`
For a hexagonal system `a=b=ne,c alpha= beta, =90^(@)`
`gamma=120^(@)`
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