When ethanoic acid is added to a solution of substance $X$, a colourless and odourless gas $Y$ is liberated. The gas $Y$ turns lime-water milky. The substance $X$ is _________.

Q. A substance $X$, when heated with $Y$ produces residue and odorless gas which turns lime water milky. Silver nitrate is added to the residue and yellow precipitate is formed. $X$ and $Y$ could be, respectively :

Q. Acetic acid is heated with $N{a}_{2}C{O}_3$ in a test tube. A colourless and odourless gas (X) is evolved. The gas turns lime water milky. Identify X.

Q. On adding sulphuric acid to which substance, the gas is evolved which turns lime water milky and has no effect on potassium permanganate solution. Guess the anion or substance involved.

Q. The colourless, odourless gas which turns lime water milky but has no effect on potassium permanganate solution is :

Q. A colourless, acidic gas turns lime water milky is: