SawaalBoxसवाल बॉक्स
2001 · Q118Science & TechnologyChemistryeasy

Which one of the following is the correct sequence in increasing order of molecular weights of the hydrocarbons?

  1. (a)Methane, ethane, propane and butane
  2. (b)Propane, butane, ethane and methane
  3. (c)Butane, ethane, propane and methane
  4. (d)Butane, propane, ethane and methane
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Official answer(a) Methane, ethane, propane and butane

2010 · Q11Science & TechnologyChemistryeasy

Chlorination is a process used for water purification. The disinfecting action of chlorine is mainly due to

  1. (a)The formation of hydrochloric acid when chlorine is added to water
  2. (b)The formation of hypochlorous acid when chlorine is added to water
  3. (c)The formation of nascent oxygen when chlorine is added to water
  4. (d)The formation of hydrogen when chlorine is added to water
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Official answer(b) The formation of hypochlorous acid when chlorine is added to water