A compound reacts with an acid to form gas P ...

ICSE Class 10 Chemistry 2022 Paper

Identify the gas ${P}$ and ${Q}$ in the reactions given below :

Question : 23 of 55

Marks: +1, -0

A compound reacts with an acid to form gas

P

which has no effect on acidified

\mathrm{K}_2\mathrm{Cr}_2\mathrm{O}_7

solution but turns lime water milky.

Solution:

Gas $P$ is carbon dioxide.

As gas carbon dioxide turns lime water milky, due to formation of white ppt. of calcium carbonate.

\mathrm{Ca}(\mathrm{OH})_2 + \mathrm{CO}_2 \rightarrow \mathrm{CaCO}_3 \downarrow + \mathrm{H}_2\mathrm{O}

The gas has no effect on filter paper dipped in acidified

\mathrm{K}_2\mathrm{Cr}_2\mathrm{O}_7

Go to Question:

Prev Question

Next Question