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JEE Advanced2018ChemistrySolid StateActual

Consider an ionic solid MX , with NaCl structure. Construct a new structure Z , whose unit cell is constructed from the unit cell of MX , following the sequential instructions given below. Neglect the charge balance. ( i ) Remove all the anions X , except the central one. ( ii ) Replace all the face centered cations M , by anions X . ( iii ) Remove all the corner cations M . ( iv ) Replace the central anion X , with

Correct answer

0

Step-by-step solution

X - ⇒ O . V M + ⇒ FCC M + X ^ - (i) 4 1 (ii) 4 – 3 3 + 1 (iii) 4 – 3 – 1 3 + 1 (iv) 1 3 Z = 3 1 = 3 .

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