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Q.

Number of formula units in unit cells of MgO (rock salt), ZnS (zinc blende) and ‘Pt’ (fcc) respectively are

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a

4,3,2

b

4,3,1

c

4,3,4

d

4,4,4

answer is C.

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Detailed Solution

SaltStructureNumber of formula units in unit cell
MgOFcc [rock salt   type]4
ZnSFcc4
PtFcc4
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