MCQs of Solid State

Solid State MCQs

Showing 81 to 90 out of 151 Questions

81.

For the structure of crystal, if atoms, molecules or ions are associated with it, then their _____ part is occupied by corners, _____ part by edges of sides and _____ part by faces.

(a)	$\frac{1}{8}, \frac{1}{4}, \frac{1}{2}$
(b)	$\frac{1}{4}, \frac{1}{2}, \frac{1}{8}$
(c)	$\frac{1}{2}, \frac{1}{4}, \frac{1}{8}$
(d)	$\frac{1}{8}, \frac{1}{2}, \frac{1}{4}$

82.

In 1 mole constitutent particles, there are _____ defects of constituent particles in arrangement.

(a)	10⁶
(b)	10¹²
(c)	10¹⁸
(d)	10²¹

83.

The defect produced due to the irregularity or deviation in the ideal arrangement of the entire rows of lattice point is _____

(a)	point defect
(b)	line defect
(c)	non-stoichiometric defect
(d)	all of these

84.

In which defect density of the crystal decreases ?

(a)	Schottky
(b)	Frenkel
(c)	Interstitial
(d)	None of these

85.

There are approximately _____ ions in 1 cm³ of NaCl.

(a)	10²⁰
(b)	10²²
(c)	10¹⁶
(d)	10²⁴

86.

Which of the following is a type of non-stoichiometric defect ?

(a)	Metal excess defect
(b)	Metal deficiency defect
(c)	Metal constant defect
(d)	Both (A) and (B)

87.

The formula of ZnO crystal after heating is _____

(a)	Zn_1-xO
(b)	Zn_1+xO
(c)	ZnO
(d)	All of these

88.

Due to metal deficiency defect the stoichiometry of FeO is _____

(a)	Fe_0.95-0.96O
(b)	Fe_0.50-0.60O
(c)	Fe_0.70-0.80O
(d)	Fe_0.30-0.40O

89.

The electrical conductivity of semi conductor are _____ ohm^-1m^-1.

(a)	10^-6 to 10^-8
(b)	10⁶ to 10⁸
(c)	10^-6 to 10⁴
(d)	10⁵ to 10⁶

90.

At normal temperature, semi conductors are _____ and with increase in temperature it behaves as..

(a)	conductor, insulator
(b)	insulator, insulator
(c)	insulator, conductor
(d)	conductor, conductor

Showing 81 to 90 out of 151 Questions