Class 12 Chemistry Quick Practice
Try real questions from active chapters in this subject.
Question 1 of 8
Percentage empty space in a bcc arrangement is
A
26%
B
32%
C
68%
D
74%
Correct answer: B
Question 2 of 8
In a solid lattice, the cation has left a lattice site and is located at an interstitial position. The lattice defect is
A
Schottky defect
B
Frenkel defect
C
p-type
D
n-type
Correct answer: B
Question 3 of 8
Which of the following is an amorphous solid?
A
silicon carbide
B
chrome alum
C
glass
D
graphite
Correct answer: C
Question 4 of 8
A crystal system with axes a ≠b ≠c and angles α ≠ß ≠γ ≠90° corresponds to
A
tetragonal
B
cubic
C
triclinic
D
monoclinic
Correct answer: C
Question 5 of 8
Volume occupied by atoms in fee is
A
75%
B
52.4%
C
68%
D
74%
Correct answer: D
Question 6 of 8
To get n-type semiconductor from silicon, it should be doped with an element having valence electrons of
A
5
B
3
C
1
D
2
Correct answer: A
Question 7 of 8
A ferromagnetic substance becomes a permanent magnet when it is placed in a magnetic field because
A
domains are not affected by magnetic field.
B
domains get oriented randomly.
C
all the domains get oriented in the direction opposite to the magnetic field.
D
all the domains get oriented in the direction of magnetic field.
Correct answer: D
Question 8 of 8
The presence of F-centres in a crystal make it
A
colourless
B
coloured
C
non-conducting
D
conducting
Correct answer: B
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