EXERCISE

A solution of potassium chloride when mixed with silver nitrate solution, an insoluble white substance is formed. Write the chemical reaction involved and also mention the type of the chemical reaction.

Identify whether the given reaction is combination reaction, displacement reaction, decomposition reaction or double displacement reaction.

${\mathrm{NH}}_3+\mathrm{HCl}\to {\mathrm{NH}}_4\mathrm{Cl}$

Identify the substance that is oxidised and reduced in the following reaction-

${\mathrm{MnO}}_2 + 4\mathrm{HCl} \stackrel{ }{\to } {\mathrm{MnCl}}_2 + 2{\mathrm{H}}_2\mathrm{O} + {\mathrm{Cl}}_2$

What are different types of combination reactions? Give an example for each.

Why is a combustion reaction an oxidation reaction?

Describe how you would test a gas to find out whether it was hydrogen.

What information do you get from the following chemical equation?

$\mathrm{Zn}\left(\mathrm{s}\right)+2\mathrm{HCl}\left(\mathrm{dil}\right)\to {\mathrm{ZnCl}}_2\left(\mathrm{aq}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right)$

Why it is necessary to balance a chemical equation ?