Class XI

 Formula of calcium hydrogen sulphate is
  1. CaHSO4
  2. Ca(HCO3)3
  3. Ca(HSO4)2
  4. Ca(HSO4)3
Burning of glucose produces heat and
  1. Carbon dioxide (gas)
  2. Water (gas)
  3. Oxygen (gas)
  4. Both A and B
 Calcium carbonate CaCO3 is a
  1. Solid
  2. Liquid
  3. Gas
  4. Aqueous
 Valency is also referred to as
  1. Combining power
  2. Volatility
  3. Rigidity
  4. Number of electron shells
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
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