What happens when chlorine gas is passed into an aqueous solution of potassium iodate? 
 

Quicklime reacts with water to produce calcium hydroxide. Write the chemical equation for the reaction.

How would you identify the gas liberated when a metal carbonate is treated with hydrochloric acid? 

Balance the following equation: 

$\mathrm{Pb}({\mathrm{NO}}_3{)}_2\to \mathrm{PbO}+{\mathrm{NO}}_2+{\mathrm{O}}_2$

In the electrolytic decomposition of water, the volume of gas liberated at the cathode is twice that of the gas liberated at the anode. Explain. 

Give an example of a double displacement reaction. Describe an activity to illustrate such a reaction.
 

An aqueous solution of lead acetate is treated with an aqueous solution of potassium iodide when a precipitate is obtained. What is the colour of the precipitate?