Question

Assertion: Cinnabar (HgS) is an example of rhombohedral crystal system.
Reason: For rhombohedral crystal system, $a=b=c,\alpha =\beta =\gamma \ne {90}^{\circ }$.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
  
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
  
• C. Assertion is correct but Reason is incorrect.
  
• D. Assertion is not correct but Reason is correct.

Answer 1

Answer: (A)

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.


Cinnabar (HgS) is an example of rhombohedral crystal system.
For rhombohedral crystal system, $a=b=c,\alpha =\beta =\gamma \ne {90}^{\circ }$.