NCERT Solutions for Chapter: Redox Reactions, Exercise 1: Short Answer Type

Identify the redox reactions out of the following reaction and identify the oxidising and reducing agents in them.

${\mathrm{HgCl}}_2\left(\mathrm{aq}\right)+2\mathrm{KI}\left(\mathrm{aq}\right)\to {\mathrm{Hgl}}_2\left(\mathrm{s}\right)+2\mathrm{KCl}\left(\mathrm{aq}\right)$

Identify the redox reactions out of the following reactions and identify the oxidising and reducing agents in them.

${\mathrm{Fe}}_2{\mathrm{O}}_3\left(\mathrm{s}\right)+3\mathrm{CO}\left(\mathrm{g}\right)\stackrel{∆}{\to }2\mathrm{Fe}\left(\mathrm{s}\right)+3{\mathrm{CO}}_2\left(\mathrm{g}\right)$

Identify the redox reactions out of the following reactions and identify the oxidising and reducing agents in them.

${\mathrm{PCl}}_3\left(\mathrm{l}\right)+3{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)\to 3\mathrm{HCl}\left(\mathrm{aq}\right)+{\mathrm{H}}_3{\mathrm{PO}}_3\left(\mathrm{aq}\right)$

Identify the redox reactions out of the following reactions and identify the oxidising and reducing agents in them.

$4{\mathrm{NH}}_3+3{\mathrm{O}}_2\left(\mathrm{g}\right)\to 2{\mathrm{N}}_2\left(\mathrm{g}\right)+6{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)$

Balance the following ionic equations.

${\mathrm{Cr}}_2{{\mathrm{O}}_7}^{2-}+{\mathrm{H}}^{+}+{\mathrm{I}}^{-}\to {\mathrm{Cr}}^{3+}+{\mathrm{I}}_2+{\mathrm{H}}_2\mathrm{O}$

Balance the following ionic equations.

${\mathrm{Cr}}_2{\mathrm{O}}_7^{2-}+{\mathrm{Fe}}^{2+}+{\mathrm{H}}^{+}⟶{\mathrm{Cr}}^{3+}+{\mathrm{Fe}}^{3+}+{\mathrm{H}}_2\mathrm{O}$

Balance the following ionic equations.

${\mathrm{MnO}}_4^{-}+{\mathrm{SO}}_3^{2-}+{\mathrm{H}}^{+}\to {\mathrm{Mn}}^{2+}+{\mathrm{SO}}_4^{2-}+{\mathrm{H}}_2\mathrm{O}$

Balance the following ionic equation

${\mathrm{MnO}}_4^{-}+{\mathrm{H}}^{+}+{\mathrm{Br}}^{-}⟶{\mathrm{Mn}}^{2+}+{\mathrm{Br}}_2+{\mathrm{H}}_2\mathrm{O}$