MCQs of Solid State

Solid State MCQs

Showing 131 to 140 out of 151 Questions

131.

The atoms of element Y form hexagonal close packing and the atoms of element X occupies

\frac{2}{3}

portion of the number of tetrahedral voids. Write the formula of the compound formed by X and Y.

(a)	X₃Y₄
(b)	X₃Y₃
(c)	X₄Y₃
(d)	X₄Y₄

132.

A particular solid is very hard and has a high melting point. In solid state it is a non conductor and its melt is a conductor of electricity. Classify the solid.

(a)	Metallic
(b)	Ionic
(c)	Network
(d)	Molecular

133.

Tetragonal crystal system has the following unit cell dimensions.

(a)	a = b = c, α = β = γ = 90°
(b)	a = b ≠ c, α = β = γ = 90°
(c)	a ≠ b ≠ c, α = β = γ = 90°
(d)	a = b ≠ c, α = β = γ = 90°, γ ≠ 90°

134.

Total volume of atoms present in a face-centred cubic unit cell of a metal is (r is radius of atom.)

(a)	$\frac{16}{3} {πr}^{3}$
(b)	$\frac{20}{3} {πr}^{3}$
(c)	$\frac{24}{3} {πr}^{3}$
(d)	$\frac{12}{3} {πr}^{3}$

135.

The crystal system of a compound with unit cell dimensions a = 0.387, b = 0.387, c = 0.504 and α = β = 90°and γ = 120° is

(a)	cubic
(b)	hexagonal
(c)	orthorhombic
(d)	rhombohedral

136.

The number of atoms contained in one face-centred cubic unit cell of monoatomic substance is

(a)	1
(b)	2
(c)	4
(d)	3

137.

In a face-centred cubic lattice, the number of nearest neighbours for a given lattice point is

(a)	6
(b)	8
(c)	12
(d)	14

138.

An oxide of transition metal that has conductivity as well as appearance like that of copper is

(a)	Mn₂O₃
(b)	V₂O₃
(c)	ReO₃
(d)	Ti₂O₃

139.

The fraction of total volume occupied by the atoms present in a simple cube is

(a)	$\frac{π}{6}$
(b)	$\frac{π}{3 \sqrt{2}}$
(c)	$\frac{π}{4 \sqrt{2}}$
(d)	$\frac{π}{4}$

140.

Assertion (A) : No compound has both Schottky and Frenkal defects. Reason (R) : Both defects change the density of the solid.

(a)	Both (A) and (R) are true and (R) is the correct explanation of (A).
(b)	Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(c)	(A) is true, but (R) are not true.
(d)	Both (A) and (R) are not true.

Showing 131 to 140 out of 151 Questions