Question

A solid is made of two elements $X$ and $Z$. The atoms $Z$ are in $CCP$ arrangement while the atoms $X$ occupy all the tetrahedral sites. What is the formula of the compound?

• A. $XZ$
• B. $XZ_{2}$
• C. $X_{2}Z$
• D. $X_{2}Z_{3}$

Answer 1

Answer: (C)

$X_{2}Z$

Answer 2

Tetrahedral sites are double comparable to octahedral sites therefore ratio of X and Z is $2:1,$ hence formula of the compound should be $X_{2}Z$ .