Class XI

Valency of nitrogen can be
  1. 2 or 4
  2. 4 or 6
  3. 3 or 5
  4. 2 or 3
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
Molar mass of calcium chloride is
  1. 100.01gmol-1
  2. 99.98gmol-1
  3. 10.98gmol-1
  4. 88.2gmol-1
Valency of Phosphate ion PO4 is
  1. -1
  2. 2
  3. -3
  4. -4
Acid salts do not include
  1. sodium hydrogen sulphate
  2. calcium hydrogen carbonate
  3. sodium phosphate
  4. disodium hydrogen phosphate
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