Class XI

Molar mass of Copper Oxide (Cu2O) is
  1. 113.14g/mol
  2. 139.33g/mol
  3. 173.298g/mol
  4. 143.09g/mol
Ions remaining unchanged in both reactants and products are called as
  1. Residual ions
  2. Sublimates
  3. Spectator ions
  4. Icons
Insoluble salt is
  1. Sodium Chloride NaCl
  2. Lead Chloride PbCl2
  3. Magnesium Chloride
  4. Potassium hydroxide
Chemical formula of Potassium Hydrogen Carbonate
  1. KHCO3
  2. K2CO3.H2O
  3. KCO3
  4. K2CO4.H2O
Sulfite ion can be written symbolically as
  1. SO4−2
  2. SO3−2
  3. SO4−3
  4. S−2
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