(C) White tin,an allotropic form of tin,is an example of a tetragonal crystal system.For a tetragonal system,the unit cell parameters are $a = b \neq

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$(A)$ is true but $(R)$ is not true.

(C) White tin,an allotropic form of tin,is an example of a tetragonal crystal system.For a tetragonal system,the unit cell parameters are $a = b \neq c$ and $\alpha = \beta = \gamma = 90^{\circ}$.The reasoning provided states $a=b=c$ and $\alpha=\beta=\gamma \neq 90^{\circ}$,which is incorrect.Therefore,Assertion $(A)$ is true,but Reason $(R)$ is false.

Class 11 Chemistry Data Entry - Chemistry Level 0 of all question bank

Assertion $(A)$: White tin is an example of a tetragonal system.
Reasoning $(R)$: For a tetragonal system,$a=b=c$ and $\alpha=\beta=\gamma \neq 90^{\circ}$. The correct answer is

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A
$(A)$ and $(R)$ are true and $(R)$ is the correct explanation of $(A)$.
B
Both $(A)$ and $(R)$ are true and $(R)$ is not the correct explanation of $(A)$.
C
$(A)$ is true but $(R)$ is not true.
D
$(A)$ is not true but $(R)$ is true.