Q. Which of the following statements is not correct?
A) The units of surface tension are dynes $Cm^{- 1}$
B) The units of viscosity coefficient of a liquid are ‘poise ‘
C) $CsCl$ crystallizes in body centred cubic type of lattice
D) The coordination number of $S^{2 -}$ in $ZnS$ is 6
Explanation
(d)
Zinc blende (ZnS) has ccp arrangement of $S^{2 -}$ and $Zn^{2 +}$ in alternative tetrahedral sites. The coordination number of $Zn^{2 +} = 4$ and $S^{2 -} = 4\$ in $ZnS$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.