Substance used to make hard water soft.

…………is used to make had water soft.

Which of the following method is used to make pure water from a solution of salt in water?

Substance used to decrease the melting point of alumina in Hall's process is _____.

Soft iron is used to make the core of transformer because of it's _____.

Chemical used in preparation of breads and cakes to make them soft.

The substance used for making permanent magnet is

Which substances can be used to generate biogas?