Class XI

Consider chemical reaction ZnCO3 + HNO3 → Al(NO3)3 + H2O, number of HNO3 molecules required for a balanced equation will be
  1. 1
  2. 2
  3. 3
  4. 4
 Valency is also referred to as
  1. Combining power
  2. Volatility
  3. Rigidity
  4. Number of electron shells
 Calcium carbonate CaCO3 is a
  1. Solid
  2. Liquid
  3. Gas
  4. Aqueous
Burning of glucose produces heat and
  1. Carbon dioxide (gas)
  2. Water (gas)
  3. Oxygen (gas)
  4. Both A and B
 Formula of calcium hydrogen sulphate is
  1. CaHSO4
  2. Ca(HCO3)3
  3. Ca(HSO4)2
  4. Ca(HSO4)3
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