What happens when silver bromide is exposed to sunlight? Write a chemical equation for this reaction. Also give one use of such a reaction.
 

Write balanced chemical equations for the following reaction:

$\mathrm{M}\mathrm{n}{\mathrm{O}}_2\left(\mathrm{s}\right)+\underset{\mathrm{C}\mathrm{o}\mathrm{n}\mathrm{c}.}{\mathrm{H}\mathrm{C}\mathrm{l}\left(\mathrm{a}\mathrm{q}\right)}\stackrel{\mathrm{H}\mathrm{e}\mathrm{a}\mathrm{t}}{\to }\mathrm{M}\mathrm{n}\mathrm{C}{\mathrm{l}}_2\left(\mathrm{s}\right)+\mathrm{C}{\mathrm{l}}_2\left(\mathrm{g}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)\mathrm{}$

Write balanced chemical equations for the following reaction:

$\mathrm{Z}\mathrm{n}\left(\mathrm{s}\right)+\mathrm{H}\mathrm{C}\mathrm{l}\left(\mathrm{a}\mathrm{q}\right)\to \mathrm{Z}\mathrm{n}\mathrm{C}{\mathrm{l}}_2\left(\mathrm{a}\mathrm{q}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right)$

We have often noticed that a food containing oil or fat, if left for a long time i.e. stale food, develops a bad taste and bad smell. This is because the oils and fats in such foods get oxidised with the passage of time. The oxidation of oils or fats result into a bad smell and bad taste.
Read the above passage and answer the following question:

State any two methods to prevent rancidity.

We have often noticed that a food containing oil or fat, if left for a long time i.e. stale food, develops a bad taste and bad smell. This is because the oils and fats in such foods get oxidised with the passage of time. The oxidation of oils or fats result into a bad smell and bad taste
Read the above passage and answer the following question:

Which method can be followed at home for the preservation of food ?