NEET Chemistry The Solid State Questions Solved

The anions (A) form hexagonal closest packing and atoms (C) occupy only 2/3 of octahedral voids in it, then the general formula of the compound is-

(A) CA                                                   (B) A2

(C) C2A3                                               (D) C3A2

(C). Hexagonal close packing contains 6 atoms per unit cell and hence the number of octahedral voids per unit cell is 6.Hence, number of A atoms per unit cell = 6

and number of C atoms per unit cell = 6×23=4

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