Class XI

Consider CaCO3 and HCl as reactants, how many molecules of CaCl2 will be formed in products
  1. 1
  2. 2
  3. 3
  4. 4
Valency of Phosphate ion PO4 is
  1. -1
  2. 2
  3. -3
  4. -4
Valency of nitrogen can be
  1. 2 or 4
  2. 4 or 6
  3. 3 or 5
  4. 2 or 3
Acid salts do not include
  1. sodium hydrogen sulphate
  2. calcium hydrogen carbonate
  3. sodium phosphate
  4. disodium hydrogen phosphate
Formation of Cl2 requires sharing of
  1. one electron
  2. one pair of electrons
  3. three electrons
  4. two pairs of electrons
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