Class XI

 Duration of bright-bulb is shorter in a magnesium-copper battery because
  1. Difference of copper ad magnesium in reactivity series is lesser
  2. Polarization occurs too quickly
  3. Magnesium is highly reactive and dissolves very rapidly in acid
  4. All of these
100 cm3, 250 cm3 and 1 dm3 can be measured using
  1. Measuring cylinder
  2. Beaker
  3. Volumetric flask
  4. Burette
LPG is obtained by
  1. Cooling methane
  2. Cooling natural gas
  3. Ccooling carbon dioxide
  4. Cooling nitrous oxide
Liquids may become vapors
  1. Upon boiling only
  2. Without boiling
  3. At a temperature below boiling point of a liquid
  4. At a temperature above boiling point of a liquid
On passing electricity through electrolyte solution,
  1. Electrolyte splits up
  2. Electrolyte decomposes
  3. Ions migrate towards oppositely charged electrodes
  4. All of these
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