When pure water boils vigorously, the bubbles that rise to the surface are composed primarily of

Which compound, when dissolved in water, conducts electricity and forms a basic solution?

Molecules of which of the following has cage like structure?

1. Diamond, 2. Graphite, 3. Fullerenes

Select the correct answer using the code given below.

Temporary hardness in water is due to which one of the following of calcium and magnesium?