Class XI

Elements and their isotopes have different
  1. number of protons
  2. number of electrons
  3. number of electrons
  4. number of electrons
oxygen gas is given off at anode
  1. Sulfur dioxide is given off at anode
  2. oxygen gas is given off at cathode
  3. oxygen gas is given off at anode
  4. oxygen gas is given off at anode
 If reactants are CuCO3 + H2SO4, products will be
  1. CuSO4
  2. H2O
  3. CO2
  4. All of these
Non-renewable fossil fuels include
  1. Coal
  2. Oil
  3. Petrol
  4. All of these
 In Copper(II) Oxide (CuO) and Carbon Monoxide (CO) reaction,
  1. CuO is being oxidized
  2. CuO is being reduced
  3. CO is being reduced
  4. CO is being oxidized
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