$A$ solution reacts with crushed egg-shells to give a gas that turns lime water milky. The solution contains:

You have two solutions,$A$ and $B$. The $pH$ of solution $A$ is $6$ and the $pH$ of solution $B$ is $8$. Which solution has a higher hydrogen ion concentration? Which of these is acidic and which one is basic?

You have been provided with three test tubes. One of them contains distilled water,and the other two contain an acidic solution and a basic solution,respectively. If you are given only red litmus paper,how will you identify the contents of each test tube?

$A$ solution turns red litmus blue,its $pH$ is likely to be

What will happen if a solution of sodium hydrogencarbonate is heated? Give the equation of the reaction involved.

Name the substance which on treatment with chlorine yields bleaching powder.