Class XI

Reduction involves
  1. Loss of oxygen
  2. Gain in hydrogen
  3. Gain in oxygen
  4. Oss of electrons
 In a reaction between CuSO4(s) and Zn(s),
  1. Copper gains electrons
  2. Copper is being reduced
  3. Copper experiences a decrease in oxidation state
  4. All of these
A strong electrolyte solution makes a bulb
  1. Shine brightly
  2. Shine dimly
  3. Does not shine at all
  4. Burst or fuse
Most reactive metal in given series is
  1. Magnesium
  2. Zinc
  3. Iron
  4. Tin
 In deuterium, number of neutrons are
  1. 1
  2. 2
  3. 3
  4. 0
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