Solid State  MCQs

MCQs of Solid State

Showing 31 to 40 out of 151 Questions
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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)

Showing 31 to 40 out of 151 Questions
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