Question

why hydrogen does
why hydrogen does not change colour in Litmus Papernot change colours in litmus paper​

Answer 1

Answer:

Hydrogen is a neutral gas. So it does not change the colour of wet litmus paper.

Answer 2

We know that the colour of litmus paper is changed by H + ions because of acid. Dry HCL it does not dissociate to give H+ ions. Acids dissociate to give ions only in the aqueous solution. In this HCL is not in aqueous form nor litmus paper is wet, so the colour of litmus paper does not change.