Embibe Experts Solutions for Chapter: Redox Reactions, Exercise 2: Exercise 2

In which of the following reactions, is there a change in the oxidation number of nitrogen atom?

The violent reaction between sodium and water is an example of:

Which substance serves as a reducing agent in the following reaction?
$14{\mathrm{H}}^{\mathrm{+}}+{\mathrm{Cr}}_{\mathrm{2}}{\mathrm{O}}_7^{2-}+3\mathrm{Ni} \stackrel{}{\to }2{\mathrm{Cr}}^{\mathrm{3+}}+7{\mathrm{H}}_{\mathrm{2}}\mathrm{O} + 3{\mathrm{Ni}}^{\mathrm{2+}}$

Nitric oxide acts as a reducing agent in the reaction,

Which of the following is a redox reaction?

A metal ion ${\mathrm{M}}^{3+}$ loses $3$ electrons, its oxidation number will be.

What is the oxidation state of $\mathrm{Cr}$ in ${\left[\mathrm{Cr}{\left({\mathrm{NH}}_3\right)}_4{\mathrm{Cl}}_2\right]}^{+}$ ?

In the reaction,

$8\mathrm{Al} + 3{\mathrm{Fe}}_3{\mathrm{O}}_4 \underset{}{\overset{}{\to }} 4{\mathrm{Al}}_2{\mathrm{O}}_3+ 9\mathrm{Fe},$

the number of electrons transferred from reductant to oxidant is ______________