Can water become a gas?

Yes. Water can become a gas.

If we boil water for a temperature of more than 100^oC, then we can see the vapours of water which is its gaseous form. Normally the heating takes about 20 minutes if we heat it on a stove.

Pls approve my answer.

Yes ofcourse water becomes gas. When heated the molecules of water gain energy and overcomes the intermolecular forces between them to become free and eventually becomes steam (gas) . while overcoming the forces , the molecules spread apart from each other which means it becomes gas .

That is why 100 degree C  is called boiling temperature of water.