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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. Sugars are converted in the liver into

  • Glycogen
  • Vitamin
  • Monosaccharide
  • None of above

Answer: Option A

2. How many different oxides are formed by nitrogen ?

  • two
  • three
  • four
  • five

Answer: Option A

3. Alloys made with mercury as one metal are called ?

  • mixtures
  • emulsions
  • solders
  • amalgams

Answer: Option D

4. The isotope atoms differ in ?

  • number of neutrons
  • atomic number
  • number of electrons
  • atomic weight

Answer: Option A

Explanation:

Important to note that isotope atoms have same atomic number.

5. The major component used in preparation of different types of glasses is :

  • Sodium borate
  • Sodium silicate
  • Silica
  • Calcium silicate

Answer: Option C

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