Engineer & Medical

Solid State question bank (Chemistry)

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Q1.

Which of the following expressions is correct in case of a $CsCl$ unit cell (edge length ‘ $a$ ’) $?$

(A)

r_{{Cs}^{+}} + r_{{Cl}^{-}} = \frac{a}{2}

(B)

r_{{Cs}^{+}} + r_{{Cl}^{-}} = \frac{\sqrt{3}}{2} a

(C)

r_{{Cs}^{+}} + r_{{Cl}^{-}} = \frac{a}{\sqrt{2}}

(D)

r_{{Cs}^{+}} + r_{{Cl}^{-}} = a

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Q2.

Sodium metal crystallises in a body centred cubic lattice with unit cell edge length of $4 Å$ . The radius of sodium atom is $___\times 10^{- 1} Å$ . (Nearest integer)

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