Write a balanced chemical equation between sodium carbonate and hydrochloric acid taken in equimolar ratio. Would the final solution have acidic or basic nature?

Oxidation is a process of loss of electron(s) and reduction is a process of gain of electron(s). Identify the substances oxidized and reduced in the following reactions.

${\mathrm{Cl}}_2+2{\mathrm{I}}^{-}\to 2{\mathrm{Cl}}^{-}+{\mathrm{I}}_2$

Oxidation is a process of loss of electron(s) and reduction is a process of gain of electron(s). Identify the substances oxidized and reduced in the following reactions.

$\mathrm{Fe}+{\mathrm{Zn}}^{2+}\to {\mathrm{Fe}}^{2+}+\mathrm{Zn}$

State whether the following reaction is combination, decomposition, precipitation or displacement reaction.

${\mathrm{AgNO}}_3\left(\mathrm{aq}\right)+\mathrm{NaCl}\left(\mathrm{aq}\right)\to \mathrm{AgCl}\left(\mathrm{s}\right)+{\mathrm{NaNO}}_3\left(\mathrm{aq}\right)$

Write proper symbols for x and y in the following chemical equations:

$3{\mathrm{CH}}_4\left(\mathrm{x}\right)+4{\mathrm{O}}_3\left(\mathrm{g}\right)\to 3{\mathrm{CO}}_2\left(\mathrm{y}\right)+6{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)$