Class XI

Acidic oxides do not include
  1. CO2
  2. SO2
  3. P2O5
  4. PbO
Dissolving, filtering and evaporating are methods of
  1. Dissolving, filtering and evaporating are methods of
  2. purification
  3. Diffusion
  4. Change of state
Least reactive metal in given series is
  1. Magnesium
  2. Zinc
  3. Iron
  4. Tin
Double covalent bond refers to sharing of
  1. One electron
  2. One pair of electron
  3. Three electrons
  4. Two pairs of electron
Crystallization of microchips does not involve
  1. a solute
  2. a crystal
  3. a solvent
  4. a soluble
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