Write the equation of chemical reaction taking place when hard water containing calcium chloride is passed through permutit.

Q. What is observed when sulphur dioxide is passed through ,water lime, water? Also write chemical equation for the reaction that takes place

Q. What is observed when sulphur dioxide is passed through, lime water, water? Also write the chemical equation for the reaction that takes place

Q. (a) What happens when calcium reacts with water? Write the chemical equation of the reaction of calcium with water.
(b) Write the chemical equation of the reaction which takes place when iron reacts with dilute sulphuric acid. What happens when the gas produced is ignited with a burning matchstick?

Q. Write the balanced chemical equations for the following reactions:
(a) $\mathrm{Calcium}hydroxide+\mathrm{Carbon}dioxide\underset{}{\to }\mathrm{Calcium}\mathrm{carbonate}+\mathrm{Water}$
(b) $\mathrm{Aluminium}+\mathrm{Copper}\mathrm{chloride}\underset{}{\to }\mathrm{Aluminium}\mathrm{chloride}+\mathrm{Copper}$