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Why is phosphorus kept under water ?

  • to make it wet
  • to make it durable
  • water forms a protective coating on it
  • to save it from catching fire when exposed to dry air

Answer: Option D

Similar Questions :

1. The substance that contains the maximum amount of nitrogen is ?

  • Ammonium Sulphate
  • Urea
  • Ammonium Nitrate
  • Ammonium Chloride

Answer: Option B

2. Why is phosphorus kept under water ?

  • to make it wet
  • to make it durable
  • water forms a protective coating on it
  • to save it from catching fire when exposed to dry air

Answer: Option D

3. The most electropositive elements among the following is :

  • Cs
  • Ca
  • Na
  • Br

Answer: Option A

4. Which have maximum number of isotopes ?

  • Bromine
  • Aluminium
  • Polonium
  • Carbon

Answer: Option C

5. Washing soda is ?

  • sodium sulphite
  • sodium bicarbonate
  • sodiun carbonate
  • sodium biosulphite

Answer: Option C

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