Class XI

 Purpose of Lean Burn engines is to
  1. Produce less air pollution
  2. Consume lesser oxygen
  3. Produce more efficient fuel combustion
  4. Use them in sky rockets
Sugar cubes dissolve more slowly in hot drink than granulated sugar because
  1. Sugar cubes dissolve more slowly in hot drink than granulated sugar because
  2. Surface area of granulated sugar is more
  3. Sugar cubes are highly soluble
  4. Both A and B
Praseodymium is the
  1. Longest name in period table
  2. Most volatile metal
  3. A recently discovered noble gas
  4. An excellent conductor of electricity
 Consider Calcium Carbonate (CaCO3) and Hydrochloric Acid (HCl) as reactants, molecules of Hydrochloric Acid (HCl) required to balance equation will be
  1. 1
  2. 2
  3. 3
  4. 4
Symbol of gold is
  1. Go
  2. Gu
  3. Au
  4. Ag
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