Chemistry - State of Matter : Solid State

Question - 1

Which of the following is not characteristic of crystalline solids?

  • A They have a regular geometry
  • B They have sharp melting points
  • C They are isotropic
  • D They undergo a clean cleavage

Question - 2

Which of the following is not a crystalline solid?

  • A Naphthalene
  • B Benzoic acid
  • C Copper
  • D Fibre glass

Question - 3

Solid carbon dioxide is an  example of

  • A metallic crystal
  • B cavalent crystal
  • C molecular crystal
  • D ionic crystal

Question - 4

An example of a substance possessing giant covalent structure is

  • A Solid \(CO_2\)
  • B silica
  • C iodine crystal
  • D white phosphorus

Question - 5

In face centred cubic cell, an atom at the face centre is shared by

  • A 4 unit cells
  • B 2 unit cells
  • C 1 unit cell
  • D 6 unit cells

Question - 6

A monoclinic crystal has dimensions

  • A \(a\neq b \neq c, \alpha = \gamma = 90^o; \beta\neq 90^o\)
  • B \(a= b = c, \alpha = \beta = \gamma = 90^o\)
  • C \(a= b = c, \alpha = \beta = 90^o; \gamma = 120^o\)
  • D \(a\neq b = c, \alpha = \beta = \gamma= 120^o\)

Question - 7

The coordination number of hexagonal closest packed (hep) structure is

  • A 12
  • B 10
  • C 8
  • D 6

Question - 8

The ABAB... packing and ABCABC.... packing are respectively called as

  • A hep and ccp
  • B ccp and hcp
  • C bcc and hep
  • D hep and bcc

Question - 9

The coordination number of a cation occupying an octahedral hole is

  • A 4
  • B 6
  • C 8
  • D 12

Question - 10

At the limiting value of radius ratio \({r^+\over r^-},\)

  • A forces of attraction are larger than the forces of repulsion
  • B forces of attraction are smaller
  • C than the forces of repulsion
  • D None of the above
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