Which of the following statements is incorrect ?

Options

A. The coordination number of each type of ion in CsCl is 8
B. A metal that crytallises in BCC structure has a coordination number 12.
C. A unit cell of an ionic crystal shares some of its ions with other unit cells.
D. The length of the unit cell in NaCl is 552 pm, if `r_(Na^(+))=95` pm and `r_(Cl^(-))=181` pm

Answer

B

Explanation

Coordination in BCC structure=8
`(r_(Na^(+)))/(r_(Cl^(-)))=(95)/(181)=0.524 gt 0.414,` So length of edge`=2(r_(Na^(+))+r_(Cl^(-)))=552` pm