Class XI

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