Solid State  MCQs

MCQs of Solid State

Showing 41 to 50 out of 151 Questions
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41.
Which of the following is diamagnetic ?
(a) Fe3+
(b) N2
(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) 163πr3
(b) 23πr3
(c) 43πr3
(d) 83πr3
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)

Showing 41 to 50 out of 151 Questions
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