Class XI

Chemical formula of Ammonium Sulfate is
  1. NH3SO4
  2. NH4(HSO4)2
  3. (NH4)2SO4
  4. (NH2)4SO4
While writing ionic equations,
  1. Ions actively involved in chemical change are written down
  2. Spectator ions may be omitted
  3. Only spectator ions are written down
  4. Both A and B
 In KHCO3, highest percentage composition is of
  1. Oxygen
  2. Potassium
  3. Carbon
  4. Hydrogen
 Only one type of atom is found in
  1. Organic compounds
  2. Inorganic compounds
  3. Pure substances
  4. Radioactive substances
 In periodic table, number of valence electron is one, in
  1. Group-I
  2. Group-II
  3. Group-III
  4. Noble gases
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