What is meant by a skeletal chemical equation?

State whether the following statement is true or false:
Keeping food in airtight containers helps to slow down oxidation.

Observe the given figure and answer the following questions:
$(i)$ Write the complete balanced chemical equation for the reaction.
$(ii)$ Write the type of reaction involved.
$(iii)$ Is there any precipitate formed?
$(iv)$ If any precipitate is formed,write the colour of the precipitate.

Balance the following chemical equations:
$(a)$ $KClO_{3} \longrightarrow KCl + O_{2}$
$(b)$ $Na_{2}CO_{3} + HCl \longrightarrow NaCl + H_{2}O + CO_{2}$

The reaction, $3 MnO_{2}(s) + 4 Al(s) \longrightarrow 3 Mn(l) + 2 Al_{2}O_{3}(s) + \text{Heat}$, is an example of:

$A$ solution of potassium chloride when mixed with silver nitrate solution, an insoluble white substance is formed. $(i)$ State two types of this reaction.