AIIMS2006ChemistrySolid State
Assertion : Graphite is an example of tetragonal crystal system. Reason : For a tetragonal system, a=b c , = =90^ , =120^ .
Options
- AIf both assertion and reason are true and reason is the correct explanation of the assertion
- BIf both assertion and reason are true but reason is not the correct explanation of the assertion
- CIf assertion is true, but reason is false
- DBoth assertion and reason are false statements.
Correct answer
D. Both assertion and reason are false statements.
Step-by-step solution
Graphite has a two dimensional sheet structure. Each C -atom is in s p^2 hybridised state and is linked to three other carbon atoms in a hexagonal planar structure. For a tetragonal system, a=b c, = = =90^ . For a hexagonal system, a=b c, = =90^ , =120^ .