MCQs of Solid State

Solid State MCQs

Showing 51 to 60 out of 151 Questions

51.

Which of the following statement is not correct ?

(a)	Crystalline solids have definite and characteristic fusion enthalpy.
(b)	For crystalline solids the graph (temperature → time) obtained on cooling after heating is a curvature.
(c)	Amorphous solids are super cooled liquids.
(d)	Amorphous solids become soft gradually during the small temperature range.

52.

Examine the following statements and decide whether they are true (T) or false (F).

(1)Due to weak dispersion forces (London forces), molecular solids like I₂ have low melting point.

(2)In ice, each molecule of h₂O combines tetrahedrally with four H₂O molecules and form ionic solid.

(3)Strong Coulombic forces exist between constituent ions in the substances like NaCl and MgCl₂.

(4)As the constituent particles in NaCl and KCl are ions, they are good conductors of electricity in the solid state.

(a)	FTFT
(b)	FTTF
(c)	TFFT
(d)	TFTF

53.

_____ is ionic solid.

(a)	NaCl
(b)	KCl
(c)	TiO₂
(d)	All of these

54.

_____ is a non polar molecular solid.

(a)	Cl₂
(b)	HCl
(c)	O₃
(d)	All of these

55.

The hybridisation of 'C' atom in graphite is _____

(a)	sp³
(b)	sp²
(c)	sp
(d)	dsp²

56.

The formula of a metallic oxide is M_0.98O. It contains M²⁺ and M³⁺. Calculate percentage proportion of M³⁺ in the crystal.

(a)	4.08%
(b)	5.08%
(c)	7.01%
(d)	6.05%

57.

Part-A contains solid crystal systems and Part-B contains corresponding true details. Match Part-A with the correct details from Part-B.

A	B
(1) Cube	(a) a ≠ b ≠ c
(2) Rhombohedral/Trigonal	(b) K₂Cr₂O₇, H₃BO₃
(3) Triclinic	(c) Cinnabar and Calcite
(4) Orthorhombic	(d) NaCl and ZnS
	(e) α = β = γ = 90°
	(f) α = β = γ ≠ 90°
	(g) a = b = c
	(h) α ≠ β ≠ γ ≠ 90°

(a)	(1) → (d), (e); (2) → (h), (i); (3) → (b), (h); (4) → (e), (h)
(b)	(1) → (d), (f); (2) → (h), (f); (3) → (c), (d); (4) → (g), (a)
(c)	(1) → (d), (g); (2) → (c), (g), (f); (3) → (a), (b), (h); (4) → (a), (e)
(d)	(1) → (d), (e); (2) → (c), (f); (3) → (f), (c); (4) → (b), (h)

58.

In a crystal lattice, A type atoms are arranged at totally 7 corners and B type atoms are arranged in the centre of the unit cell. What will be the molecular formula of this compound ?

(a)	A₇B₂₄
(b)	A₅B₂₅
(c)	A₇B₈
(d)	A₅B₁₈

59.

In NaCl lattice structure, if one of the sodium ion is removed from the corner, then find the formula of the resulting compound.

(a)	Na₇Cl₂₄
(b)	NaCl
(c)	NaCl₃
(d)	Na₃Cl₁₁

60.

In a face centred unit cell, an atom at the face contributes _____ to the unit cell.

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

Showing 51 to 60 out of 151 Questions