Match the column List - I Type of solid List - II Facts related to the solids assuming ideal radius ratio (P) NaCl (1) Smaller ions present in the voids has coordination number greater than 4 (Q) CsCl

Question

Match the column List - I Type of solid List - II Facts related to the solids assuming ideal radius ratio (P) NaCl (1) Smaller ions present in the voids has coordination number greater than 4 (Q) CsCl (2) The distance between the nearest voids containing the smaller ions is the same as the distance between any two nearest larger ions (R) ZnS (Zinc Blende) (3) 100 % of the voids of a particular type are occupied by the smaller ions . (S) CaF 2 (4) 50 % of the voids of a particular type are occupied by the smaller ions. (5) Coordination number of the smaller ion is not more than the total number of formula units of the ionic compound in a single smallest unit cell.

TestHub · Accepted Answer

NaCl: CN, Na⁺ = 6, Cl⁻ = 6

Nearest OHVs → $\frac{a}{2}$

Nearest Cl⁻ → $\frac{a}{2}$

Zeff = 4

CsCl CN, Cs⁺ = 8, Cl⁻ = 8

Nearest cubic voids → $a$

Nearest Cs⁺ → $a$

$Z_{e ff} = 2$

ZnS CN, Zn²⁺ = 4, S²⁻ = 4

Nearest occupied THV $\to \frac{a}{2}$

Nearest S²⁻ → $\frac{a}{2}$

Zeff = 4

CaF₂ CN, F⁻ = 4, Ca²⁺ = 8

Nearest THV → $\frac{a}{2}$

Nearest Ca²⁺ $\to \frac{a}{2}$

Zeff = 4

Chemistry - Solid State Question with Solution | TestHub

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Doubts & Discussion

List - I Type of solid	List - II Facts related to the solids assuming ideal radius ratio
(P) NaCl	(1) Smaller ions present in the voids has coordination number greater than 4
(Q) CsCl	(2) The distance between the nearest voids containing the smaller ions is the same as the distance between any two nearest larger ions
(R) ZnS (Zinc Blende)	(3) 100 % of the voids of a particular type are occupied by the smaller ions .
(S) CaF₂	(4) 50 % of the voids of a particular type are occupied by the smaller ions.
	(5) Coordination number of the smaller ion is not more than the total number of formula units of the ionic compound in a single smallest unit cell.