Question

Perovskite, a mineral of titanium is found to contain calcium atoms at the corners, oxygen atoms at the face centres and titanium atoms at the centre of the cube. Oxidation number of titanium in the mineral is
A. $+2$
B. $+3$
C. $+4$
D. $+1$

Answer 1

Correct Answer - C
Ca atoms per unit cell =$8xx1/8=1$
O atoms per unit cell =$6xx1/2=3$
Ti atoms per unit cell = 1
Hence, the formula of the mineral is $CaTiO_3$
Suppose ox. No . Of Ti =x
Then +2+x+3(-2)=0 or x =+4