When sulphuric acid is added to 1g solid sodiumchloride taken in a test tube, which gas is released? What changes do you observe when you test the gas with dry and wet litmus paper? What conclusion do you draw by this experiment?

Explanation

The gas produced is HCL. Dry blue litmus paper does not change colour but wet litmus paper changes its colour to red. Dry HCI gas is not acidic but HCI solution is acidic. This is because in the presence of water, HCl dissociates to give `H^+` ions.
`HCl(g) + H_2O (l) to H_3O^(+) " or " H_(aq)^(+) + Cl^-`