Class IX

Number of electrons lost by atoms of group IIIA equals
  1. 2
  2. 4
  3. 5
  4. 3
Bonds which involve 3 shared electron pairs are
  1. single covalent bond
  2. triple covalent bond
  3. double covalent bond
  4. none of above
Number of electrons lost by atoms of group IIIA equals
  1. 2
  2. 4
  3. 5
  4. 3
Ionic crystals have
  1. low melting points
  2. moderate melting points
  3. high melting points
  4. none of above
. Atoms of metals form
  1. molecules
  2. anions
  3. cation
  4. none of above
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