Class XI

Hydrogen of acids is replaced by
  1. different metals
  2. different non-metals
  3. different gases
  4. all of these
Valency of nitrogen can be
  1. 2 or 4
  2. 4 or 6
  3. 3 or 5
  4. 2 or 3
Molar mass of calcium chloride is
  1. 100.01gmol-1
  2. 99.98gmol-1
  3. 10.98gmol-1
  4. 88.2gmol-1
Electrode is
  1. Substance which conducts electricity but remains unchanged chemically
  2. Plate which carried electricity into liquid
  3. A fully ionized liquid that undergoes electrolysis
  4. All of these
Consider CaCO3 and HCl as reactants, how many molecules of CaCl2 will be formed in products
  1. 1
  2. 2
  3. 3
  4. 4
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