Match the structures given in List-I with their characteristics given in List-II. Here, ' $a$ ' is the edge length of the cube, $r^{+}$ is the radius of the cation, and $r^{-}$ is the radius of the anion.

Question

Match the structures given in List-I with their characteristics given in List-II. Here, ' a ' is the edge length of the cube, r + is the radius of the cation, and r − is the radius of the anion.

TestHub · Accepted Answer

(P) Rock salt structure

Coordination number = 6:6 ⇒ cation & anion same ⇒ (4)

Nearest anion distance in FCC = a/√2 ⇒ (2)

P → (2,4)

(Q) Zinc blende structure

Coordination number of cation = 4 ⇒ (1)

Tetrahedral structure follows radius relations ⇒ (3)

Some geometrical relations also valid ⇒ (2,4)

Q → (1,2,3,4)

(R) Fluorite structure

CN: Ca²⁺ = 8, F⁻ = 4 (not same)

Radius relation fits ⇒ (3)

R → (3)

(S) CsCl structure

Coordination number = 8:8 ⇒ same ⇒ (4)

Body diagonal relation:

S → (4)

Chemistry - Solid State Question with Solution | TestHub

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JEE Main - 1 year (12th class)