Which of the following can be used to remove the permanent hardness of water?

  • A
    Soda lime
  • B
    Sodium bicarbonate
  • C
    Washing soda
  • D
    Sodium chloride

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Identify the incorrect statement regarding heavy water $(D_2O)$.

How and why does the density of liquid water change on prolonged electrolysis?

In Clark's method,the chemical used is:

The temperatures of maximum density in $H_2O$ and $D_2O$ respectively are:

Which of the following substances is used in the laboratory to dry natural gas quickly?

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