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HARDMCQ SINGLENEET ChemistryInorganic ChemistrySolid stateAchiever Section

The unit cell of a binary alloy composed of A and B metals, has ccp. Structure with A atoms occupying the corners and B atoms occupying centres of each face of the cube. If during the crystallisation of this alloy, in the unit cell two A atoms are missed, the overall composition per unit cell is

A.AB₆ (b) AB₃
C.AB₈ (d) A6B₂₄
Explanation

The contribution of atom A = 1 6 6 8 8 x The contribution of atom B = 1 6 3 2 x So the formula of the compound = A B =A B 6/8 3 6 24 Hence the correct answer is option (d)

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