HARDMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistrySolid stateAchiever Section

Number of unit cells in 4 g of X (atomic mass=40). Which crystallises in bcc pattern is (NA=Avogadro number)

A.0.1NA

B.2×0.1NA

C.0.1✓ Correct

D.2×NA

Explanation

Given that atomic mass X =40 Number of unit cell for BCC z =2 Number of atoms in 4g= 4 0.1 40 A A N N x x Now the number of unit cells = 0.1 2 x A N unit cell Hence the correct answer is option (c)

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