NEET Chemistry The Solid State Questions Solved


A solid PQ have rock salt type structure in which Q atoms are at the corners of the unit cell. If the body centred atoms in all the unit cells are missing, the resulting stoichiometry will be-

(A) PQ                                               

 (B) PQ2

(C) P3Q4                                             

(D) P4Q3

 

(C). In rock salt structure, atoms at the corner are also present at the face centres and hence

                ZQ=8×18+6×12=4

And, the atoms at body centre also present at edge centres. But from question, body centres are missing and hence

Zp=12×14=3.

 Formula of resulting solid - P3Q4.

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