Question

out of dry air and wet Air which is more heavier and why

Answer 1

Wet air is heavier.

Wet air is not only cold but also has tiny water droplets.
We know that cold air is heavier and due to the weight of water droplets, wet air becomes heavier than dry air.
Dry air is considerably hotter and doesn't has water droplets and hence is lighter.

Hope it helps dear friend ☺️✌️

Answer 2

Dry air is more heaviest bcoz dry air contains no water vapour, and is mostly a mixture of molecular nitrogen and molecular oxygen .