Ncert Exercises & Solutions

Select the correct option based on statements below:

Assertion (A):	Total number of octahedral voids present in the unit cell of cubic close packing including the one that is present at the body center, is four.
Reason (R):	Besides the body center there is one octahedral void present at the center of each of the six faces of the unit cell and each of which is shared between two adjacent unit cells.

1.	Both (A) and (R) are true and (R) is the correct explanation of (A).
2.	Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.	(A) is true but (R) is false.
4.	(A) is false but (R) is true.