The Solid State Test

The Solid State

This is The Solid State Test-03 for CBSE class 12 Chemistry.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Packing efficiency in body centered cubic structure is
  • A
    74%
  • B
    100%
  • C
    68%
    Correct
  • D
    52.35%
2
Volume of unit cell occupied in face centered cubic arrangement is
  • A
    100%
  • B
    68%
  • C
    74%
    Correct
  • D
    52.35%
3
is The radius ratio of body centred cubic structure
  • A
    0.414 to 0.732
  • B
    0.155 to 0.225
  • C
    0.732 to 1.00
    Correct
  • D
    0.225 to 0.414
4
Which of the following lattices has the highest packing efficiency?
  • A
    Hexagonal close packed
    Correct
  • B
    Simple cubic
  • C
    Primitive cubic
  • D
    Body centered cubic
5
Packing efficiency for simple cubic structure is
  • A
    74%
  • B
    68%
  • C
    52.35%
    Correct
  • D
    100%
6
Which among the following is an example of non – polar molecule?
  • A
    Ethyl alcohol
  • B
    Methane
    Correct
  • C
    Water
  • D
    Diethyl ether
7
Silicon carbide is an example of
  • A
    Molecular solid
  • B
    Ionic solid
  • C
    Network solid
    Correct
  • D
    non – polar solid
8
The process by which impurity is introduced in semiconductors to enhance its conductivity is known as
  • A
    Overlapping
  • B
    Doping
    Correct
  • C
    Magnetic moment
  • D
    Superconductivity
9
Electrical conductivity of semi conductors increases with increase in
  • A
    temperature
    Correct
  • B
    pressure
  • C
    Mass
  • D
    density
10
When heated to high temperature, ferromagnetic substance changes to
  • A
    Ferrimagnetic
  • B
    paramagnetic
    Correct
  • C
    diamagnetic
  • D
    insulators
11
The property of a substance to offer no resistance to the flow of electricity at a particular temperature is known as
  • A
    defects
  • B
    superconductivity
    Correct
  • C
    conductivity
  • D
    Doping
12
At what temperature range do most of the metals become superconductors?
  • A
    0K – 1K
  • B
    2K – 5K
    Correct
  • C
    7K – 10K
  • D
    15K – 20K
13
Frenkel defects are not found in alkali metal halides because
  • A
    Alkali metal ions have small size
  • B
    None of these
  • C
    Halide ions are larger in size
  • D
    Alkali metal ions have large size
    Correct
14
In cubic close packing(ccp) arrangement, the pattern of the successive layers will be designated as
  • A
    AB,AB,AB….
  • B
    AB, ABC,AB, ABC….
  • C
    none of the above
  • D
    ABC, ABC,ABC
    Correct
15
Which crystal system has axial angles equal to $90^o$?
  • A
    Monoclinic
  • B
    Rhombohedral
  • C
    Orthorhombic
    Correct
  • D
    Hexagonal