Question

which layer is absence of water vapour​

Answer 1

In Stratosphere water vapour is not present

Answer 2

Hey mate!!

here's your answer..

»The layer which has absence/no water vapour is Stratosphere.

› There contains little water vapor. Because of this, few clouds are found in this layer; almost all clouds occur in the lower, more humid troposphere. Polar stratospheric clouds (PSCs) are the exception.

★★Hope it will be helpful for you ☺★★