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Permanent hardness of water is due to the presence of ?

  • Magnesium bicarbonate
  • Calcium bicarbonate
  • Sodium bicarbonate
  • Calcium sulphate

Answer: Option D

Similar Questions :

1. Nail polish remover contains ?

  • benzene
  • acetic acid
  • acetone
  • petroleum ether

Answer: Option C

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. pH of blood is ?

  • 10.4
  • 9
  • 7.4
  • 4

Answer: Option C

4. Who is regarded as father of modern chemistry ?

  • Ruterford
  • Einstein
  • Lavoisier
  • C.V. Raman

Answer: Option C

5. The most electropositive elements among the following is :

  • Cs
  • Ca
  • Na
  • Br

Answer: Option A

Read more from - Chemistry Questions Answers
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