Class XI

Valency of Carbon (C) is
  1. 1
  2. 2
  3. 3
  4. 4
Giant crystal lattices are only formed in
  1. Ionic compounds
  2. Covalent compounds
  3. Metallic compounds
  4. Dative bond
Metals are solids except
  1. helium
  2. selenium
  3. mercury
  4. Potassium
In Na2CO3.10H2O, percentage of sodium is
  1. 0.1678
  2. 0.1608
  3. 0.1659
  4. 0.1684
Formula of Nitric Acid is
  1. H(NO3)2
  2. HNO2
  3. HNO3
  4. H2NO4
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