JEE Chemistry - Solid State

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Question - 1

The percentage of packing efficiency in fcc lattice is _________.

  • A 70
  • B 72
  • C 74
  • D 76

Question - 2

What is the coordination number of cation in caesium chloride (bcc arrangement)?

  • A 2
  • B 4
  • C 6
  • D 8

Question - 3

How many lattice points are there in one unit cell of fcc lattice?

  • A 8
  • B 14
  • C 18
  • D 22

Question - 4

Calculate the number of atoms in a cubic unit cell having one atom on each corner and two atoms on each body diagonal.

  • A 9
  • B 18
  • C 22
  • D 45

Question - 5

A metal crystallises in a simple cubic unit cell. If the length of the edge of the unit cell is
6.2 A, then the diameter of each atom of the metal is ____nm.

  • A 0.62
  • B 0
  • C 1
  • D 2

Question - 6

In a compound, atoms of element Y form ccp lattice and those of element X occupy 2/3rd of tetrahedral voids. How many atoms of X are present in one formula unit of the compound?

  • A 1
  • B 3
  • C 2
  • D 4

Question - 7

An ionic solid has NaCl structure. The coordination number of cation is _______.

  • A 3
  • B 6
  • C 12
  • D 18

Question - 8

How many of the following are p-type semiconductors?
Ge doped with Ga,
Ge doped with As,
Si doped with P,
Si doped with Al,
Ge doped with In,
Si doped with Sb.

  • A 3
  • B 9
  • C 12
  • D 18

Question - 9

For a first order diffraction of X-rays of wavelength l 54 A, the distance (d) between two successive planes in a crystal is 2.01 A. The value of (sin \(\theta\)) is _________.

  • A 0.38
  • B 0.2
  • C 0.12
  • D 0.69

Question - 10

Consider the below given arrangement of spheres in two dimensions. The ratio of coordination number of each sphere in arrangement I to coordination number of each sphere in arrangement II is _________.

  • A 1
  • B 1.5
  • C 1.8
  • D 1.2