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2019 · Q39Science & TechnologyChemistryeasy

In India, the use of carbofuran, methyl parathion, phorate and triazophos is viewed with apprehension. These chemicals are used as

  1. (a)pesticides in agriculture
  2. (b)preservatives in processed foods
  3. (c)fruit-ripening agents
  4. (d)moisturising agents in cosmetics
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Official answer(a) pesticides in agriculture

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