The Solid State MCQ - Arvind Sir Patna

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Solid State

Showing 1 to 10 out of 70 Questions

What type of solid is sodium chloride ?

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

Answer:

Option (a)

The melting points of ionic solids are

(a)	Very high
(b)	Normal
(c)	Very low
(d)	Abnormal

Answer:

Option (a)

What type of solid is quartz ?

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

Answer:

Option (c)

What type of crystal structure is of silver metal ?

(a)	fcc
(b)	Simple cube
(c)	bcc
(d)	Metallic

Answer:

Option (a)

What is the percentage packing efficiency of simple cube ?

(a)	53.26
(b)	68.0
(c)	74.0
(d)	52.36

Answer:

Option (d)

How many times is the number of octahedral voids as compared to tetrahedral voids ?

(a)	4
(b)	8
(c)	2
(d)	0.5

Answer:

Option (d)

What is the number of atoms in the unit cell of body centred cube ?

(a)	2
(b)	1
(c)	4
(d)	6

Answer:

Option (a)

What is the number of atoms in face centred cube ?

(a)	2
(b)	1
(c)	4
(d)	6

Answer:

Option (c)

In which of the following compounds Schottky defect is present ?

(a)	NaCl
(b)	ZnS
(c)	KBr
(d)	SrCl2

Answer:

Option (a)

In which of the following compounds Frenkel defect is present ?

Answer:

Option (b)

12.

Which of the following elements is a semiconductor ?

(a)	Na
(b)	Al
(c)	Fe
(d)	Ge

Answer:

Option (d)

13.

Which type of semiconductor is obtained by doping Si with Bi ?

(a)	n-type
(b)	p-type
(c)	pnp-type
(d)	npn-type

Answer:

Option (a)

14.

With which element, the conductivity of ReO₃ is matching ?

(a)	Copper
(b)	Zinc
(c)	Iron
(d)	Aluminium

Answer:

Option (a)

15.

Which of the following will be paramagnetic ?

(a)
(b)
(c)
(d)

Answer:

Option (b)

16.

Which theory is useful in explaining electrical conductivity in conductors and semiconductors ?

(a)	Pauli’s principle
(b)	Avogadro’s theory
(c)	band theory
(d)	Hybridisation theory

Answer:

Option (c)

17.

_____ of the following is a crystalline solid.

(a)	Glass
(b)	Rubber
(c)	Plastic
(d)	Sugar

Answer:

Option (d)

18.

Which of the following is an example of a covalent solid ?

(a)	Silicon
(b)	Sulphur
(c)	Phosphorus
(d)	Iodine

Answer:

Option (a)

19.

Select the non-conductor substance from the following.

(a)	NaCl
(b)	P₄
(c)	Cr
(d)	KNO₃

Answer:

Option (b)

20.

Select highest electrical conductor and thermal conductor from the following.

(a)	Si
(b)	Li
(c)	NaCl
(d)	Ice

Answer:

Option (b)

21.

Which of the following compound has highest melting point ?

(a)	SiO_2(s)
(b)	H₂O_(s)
(c)	Mg_(s)
(d)	CO_2(s)

Answer:

Option (a)

22.

What is the percentage of empty space in ccp and bcc structures ?

(a)	48% and 26%
(b)	30% and 26%
(c)	26% and 32 %
(d)	32 % and 48%

Answer:

Option (c)

23.

The correct statement about the crystal structure of zinc blende is _____

(a)	Zn²⁺ and S^2- each has co-ordination number equal to six
(b)	Zn²⁺ and S^2- each has co-ordination number equal to four
(c)	Zn²⁺ and S^2- each has co-ordination number equal to two
(d)	Zn²⁺ and S^2- each has co-ordination number equal to eight

Answer:

Option (b)

24.

In crystal structure of MgO, ionic radius of each of Mg²⁺ and O^2- is respectively 0.0659 and 0.139 nm. What will be the position of Mg²⁺ ions ?

(a)	In the octahedral void of cubic close packing arrangement.
(b)	In each of tetrahedral voids.
(c)	Some in octahedral voids and some in tetrahedral voids.
(d)	In alternative tetrahedral voids.

Answer:

Option (a)

25.

For hexagonal crystal syestem which of the following sets of parameters of axial distances and axial angles is correct ?

(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 = 90°, γ = 120°

Answer:

Option (d)

26.

Crystal system having axial distance a ≠ b ≠ c and axial angle α ≠ β ≠ γ ≠ 90° is _____ .

(a)	Tetragonal
(b)	Triclinic
(c)	Monoclinic
(d)	Orthorhombic

Answer:

Option (b)

27.

Which of the following is not an example of tetragonal crystal system ?

(a)	TiO₂
(b)	CuSO₄
(c)	SnO₂
(d)	BaSO₄

Answer:

Option (d)

28.

In a unit cell, the relation between the edge of the cube (a) and the radius of the particle (r) in fcc, bcc and simple cubic lattice is respectively _____ .

(a)
(b)
(c)
(d)

Answer:

Option (b)

29.

In the crystal of a compound formed by elements A and B, atoms of A are at the corners of the cube and atoms of B are at the centres of the faces. What should be the formula of this compound ?

(a)	AB
(b)	AB₂
(c)	AB₃
(d)	A₃B

Answer:

Option (c)

30.

Select from the following the correct set of fractions of constituents (atoms, ions and molecules) associated respectively with corners, edges and faces to form crystal lattice points in a crystal.

(a)
(b)
(c)
(d)

Answer:

Option (a)

31.

A crystal AB possesses the same structure as NaCl in which every A⁺ ion is present at the corner of the unit cell. If atoms present at the centre of face on the same axis are removed, the formula of the crystal will be _____ .

(a)	A₄B₄
(b)	A₄B₃
(c)	A₃B₄
(d)	AB

Answer:

Option (c)

32.

What is the empty space in the hexagonal close packing arrangement of a crystal ?

(a)	26%
(b)	32%
(c)	74%
(d)	52%

Answer:

Option (a)

33.

An oxide of manganese has magnetic moment (μ) equal to 4.9 B.M. Identify the oxide.

(a)	MnO
(b)	Mn₂O₃
(c)	MnO₂
(d)	Mn₂O₇

Answer:

Option (b)

34.

At what temperature will the Schottky defect be maximum ?

(a)	108 °C
(b)	-273 °C
(c)	-100 °C
(d)	0 °C

Answer:

Option (a)

35.

What is the approximate value of conductivity of non-conductor ?

(a)	10⁴ to 10⁷ ohm^-1 m^-1
(b)	10^-20 to 10^-10 ohm^-1 m^-1
(c)	10^-6 to 10⁴ ohm^-1 m^-1
(d)	10^-4 to 10^-7 ohm^-1 m^-1

Answer:

Option (b)

36.

Which of the following oxides act as a semiconductor ?

(a)	TiO
(b)	TiO₂
(c)	Ti₂O₃
(d)	FeO

Answer:

Option (c)

37.

In which of the following states of ionic compounds, Schottky defect is observed maximum in crystalline structure ?

(a)	Gas
(b)	Plasma
(c)	Liquid
(d)	Solid

Answer:

Option (d)

38.

Which of the following is diamagnetic ?

(a)	KO₂
(b)	SiO₂
(c)	TiO₂
(d)	BaO₂

Answer:

Option (c)

39.

The space between valence band and conduction band is called _____ .

(a)	Conductivity gap
(b)	Energy gap
(c)	Valence gap
(d)	Both (A) and (C)

Answer:

Option (b)

40.

Schottky defect is seen in _____ .

(a)	solids whose cations and anions are of almost same size
(b)	solids whose co-ordination numbers are high
(c)	solids whose co-ordination numbers are low
(d)	Both (A) and (B)

Answer:Option (d)

41.

Which of the following is diamagnetic ?

(a)	Fe³⁺
(b)	Ni²
(c)	Cu²⁺
(d)	O₂

Answer:Option (b)

42.

Which defect creates when some P atom added to Si ?

(a)	Displacement defect
(b)	Metal deficiency defect
(c)	Electron defect
(d)	Metal excess defect

Answer:Option (c)

43.

Match A with B with correct options.

	A		B
	(a) Triclinic		(p) a ≠ b ≠ c, α = γ = 90°, β ≠ 120°
	(b) Hexagonal		(q) a = b ≠ c, α = β = γ = 90°
	(c) Monoclinic		(r) a = b ≠ c, α = β = 90°, γ = 120°
	(d) Tetragonal		(s) a ≠ b ≠ c, α ≠ β ≠ γ ≠ 90°
(a)		(a) → (s), (b) → (r), (c) → (p), (d) → (q)
(b)		(a) → (r), (b) → (s), (c) → (q), (d) → (p)
(c)		(a) → (p), (b) → (q), (c) → (r), (d) → (s)
(d)		(a) → (q), (b) → (p), (c) → (s), (d) → (r)

Answer:Option (a)

44.

For each of the substances in Part-A, select the correct option of magnetic property from part-B.

	A		B
	(a) O₂		(p) Ferromagnetic
	(b) NaCl		(q) Anti-ferromagnetic
	(c) Ferrite		(r) Ferrimagnetic
	(d) CrO₂		(s) Paramagnetic
			(t) Diamagnetic
(a)		(a) → (p), (b) → (q), (c) → (r), (d) → (s)
(b)		(a) → (q), (b) → (t), (c) → (r), (d) → (s)
(c)		(a) → (s), (b) → (t), (c) → (r), (d) → (p)
(d)		(a) → (r), (b) → (p), (c) → (s), (d) → (q)

Answer:

Option (c)

45.

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

(1) In two dimensional close packing, if all rows are arranged inAB AB AB type, then by arrangement of six spheres around each sphere, hexagonal close packing structure is obtained.

(2) The hole (void) between three spheres in the plane above and three spheres in the plane below is called octahedral void.

(3) In simple cube all layres are stacked in A – A – A type and hence each sphere has co-ordination number six.

(4) In bcc packing structure spheres occupy 68% volume and layers are stacked in AB AB AB type.

(a)	TFTF
(b)	FTTT
(c)	TTFF
(d)	TTTT

Answer:

Option (d)

46.

In semiconductors like silicon and germanium, which element is required for doping to get positive type (p-type) semiconductors ? How much is the energy gap in them ?

(a)	Boron is used for doping. The energy gap is greater than metals and less than non-metals.
(b)	Aluminium is used for doping. The energy gap is less than metals and greater than non-metals.
(c)	Phosphorous is used for doping. The energy gap is greater than non-metals.
(d)	Arsenic is used for doping. The energy gap is greater than metals and less than non-conductors.

Answer:

Option (a)

47.

Diamond has fcc crystal structure, in which each carbon atom is attached with four other carbon atoms then, the number of carbon atoms per unit cell in diamond are _____ .

(a)	12
(b)	6
(c)	8
(d)	4

Answer:

Option (c)

48.

Crystal of lithium has body centred cubic structure. If the length of a side of its unit cell is 351 pm, what will be atomic radius of lithium ?

(a)	75.5 pm
(b)	300.5 pm
(c)	240.8 pm
(d)	151.8 pm

Answer:

Option (d)

49.

Total volume of atoms present in a body centred unit cell is (r is atomic radius) _____.

(a)
(b)
(c)
(d)

Answer:

Option (d)

50.

How many defects exists in the arrangement of constituent particles of 7.45 gms KCl? [ K = 39, Cl = 35.5 gm/mole]

(a)	10 × 10²³
(b)	1 × 10⁶
(c)	1.0 × 10^-6
(d)	10 × 10⁴

Answer:Option (d)

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.

Answer:

Option (b)

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

Answer:

Option (d)

53.

_____ is ionic solid.

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

Answer:

Option (d)

54.

_____ is a non polar molecular solid.

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

Answer:

Option (a)

55.

The hybridisation of ‘C’ atom in graphite is _____

(a)	sp³
(b)	sp²
(c)	sp
(d)	dsp²

Answer:

Option (b)

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%

Answer:

Option (a)

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)

Answer:

Option (c)

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

Answer:

Option (c)

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

Answer:

Option (a)

60.

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

(a)	½ th part
(b)	1 th part
(c)	¼ th part
(d)	1/8 th part

Answer:

Option (a)

61.

In a body centred unit cell, an atom at the body-centre is shared by _____

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

Answer:

Option (d)

62.

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 = 90°, γ ≠ 90°

Answer:

Option (b)

63.

In a ccp structure, the _____

(a)	first and third layers are repeated
(b)	first and fourth layers are repeated
(c)	second and fourth layers are repeated
(d)	first, third and sixth layers are repeated

Answer:

Option (b)

64.

Which type of stacking pattern is found in sodium chloride’s crystal lattice ?

(a)	A-B-A-B…
(b)	A-A-A-A…
(c)	A-B-C-A-B-C…
(d)	A-B-C-D-A-B-C-D…

Answer:

Option (c)

65.

The co-ordination number of a metal crystallizing in a hexagonal close packed structure is _____

(a)	6
(b)	8
(c)	12
(d)	4

Answer:

Option (c)

66.

A compound of zinc which is white in cold state and yellow in hot state is _____ .

(a)	ZnS
(b)	ZnCl₂
(c)	ZnO
(d)	ZnSO₄

Answer:

Option (c)

67.

In the alloys of copper and silver, _____ defect is observed.

(a)	Impurity
(b)	Frenkel
(c)	Metal excess
(d)	Displacement

Answer:

Option (d)

68.

The energy gaps (E_g) between valence band and conduction band for diamond, silicon and germanium are in the order of _____ .

(a)	E_g (diamond) > E_g (silicon) > E_g (germanium)
(b)	E_g (diamond) < E_g (silicon) < E_g (germanium)
(c)	E_g (diamond) = E_g (silicon) = E_g (germanium)
(d)	E_g (diamond) > E_g (germanium) > E_g (silicon)