Class XI

Wax is a
  1. Carbonate
  2. Hydrocarbon
  3. Hydro carbonate
  4. Non-metal
Formula of Calcium Hydrogen Carbonate indicates
  1. That for each ion of hydrogen carbonate, two ions of Ca are required
  2. That for each ion of Ca, two ions of hydrogen carbonate are required
  3. That valence of HCO3 is −2
  4. 1 hydrogen ion combined to 1 calcium and 3 carbonate ions
Valency of all of these ions is +1, except
  1. Ag
  2. Cu
  3. NH4
  4. Fe
For an overhead power cable, preferable metal conductor is
  1. Steel
  2. Aluminum
  3. Mercury
  4. Graphite
According to collision theory, increase in temperature increases
  1. Kinetic energy of reactants
  2. Heat energy of reactants
  3. Both A and B
  4. Humidity in air
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