Question

Water is formed by the chemical combination of hydrogen and oxygen.
A molecule of water consists of 2 atoms of hydrogen and 1 atom of oxygen, combined chemically. Figure 1 represents the molecules in liquid water (black – oxygen atom; gray – hydrogen atom).


Which of the following represents water molecules after liquid water is vaporized on boiling?

(a) (b) (c)

Answer 1

When we boil liquid water, its molecules get separated from each other on vaporization but dissociation of water molecule doesn't take place.
So, H₂O will remain in the vapour phase as well.

Hence, the correct answer is option "a".