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 crystallises 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"andr_(Cl^(-))=181"pm"`

Answer

B

Explanation

Coordination in BCC structure = 8
`r_(Na^(+))/r_(Cl^(-))=95/181=0.524gt0.414`
So length of edge = `2(r_(Na^(+))+r_(Cl^(-)))=552"pm"`