Redox Reactions in Terms of Electron Transfer

The standard reduction potentials at 298 K for the following half reactions are given against each:
$\begin{array}{l}{\mathrm{Zn}}^{2+}\left(\mathrm{aq}\right)+2\mathrm{e}\stackrel{}{\rightleftharpoons }\mathrm{Zn}\left(\mathrm{s}\right) ;-0.762\\ {\mathrm{Cr}}^{3+}\left(\mathrm{aq}\right)+3\mathrm{e}\stackrel{}{\rightleftharpoons }\mathrm{Cr}\left(\mathrm{s}\right) ; -0.740\\ 2{\mathrm{H}}^{+}\left(\mathrm{aq}\right)+2\mathrm{e}\stackrel{}{\rightleftharpoons }{\mathrm{H}}_2\left(\mathrm{g}\right) ; 0.000\\ {\mathrm{Fe}}^{3+}\left(\mathrm{aq}\right)+\mathrm{e}\stackrel{}{\rightleftharpoons }{\mathrm{Fe}}^{2+}\left(\mathrm{aq}\right) ; 0.770\end{array}$
Which is the strongest reducing agent?

Which of the following reactions is possible at the anode?

When copper rod is kept in silver nitrate solution, the solution turns green.

Explain the observations made when cobalt rod is kept in nickel sulphate solution.

Explain the observations made when zinc rod is kept in copper nitrate solution.

Explain the observations made when copper rod is kept in silver nitrate solution.

When ${\mathrm{KMnO}}_4$ acts as an oxidizing agent and ultimately forms ${{\mathrm{MnO}}_4}^{2-}$, ${\mathrm{MnO}}_2$, ${\mathrm{Mn}}_2{\mathrm{O}}_3$ and ${\mathrm{Mn}}^{2+}$, then the number of electrons transferred in each case, respectively are

If we have $1\mathrm{M}$ aqueous solution of $\mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_2$, which of the following vessel can be used to store it:
 

Explain oxidation and reduction on the basis of electronic change. 

Substance which donate electron are called -

Which of the following reaction does not involve oxidation and reduction?

One among the following is not obtained upon heating of potassium permanganate. Identify the ompound.

From the following reaction choose reaction that are intramolecular redox reactions but not disproportionation reactions

In the reaction ${\mathrm{Cr}}_2{\mathrm{S}}_3+{\mathrm{Mn}}^{2+}+{\mathrm{NO}}_3^{-}+{\mathrm{CO}}_3^{2-}\to {\mathrm{CrO}}_4^{2-}+{\mathrm{MnO}}_4^{2-}+\mathrm{NO}+{\mathrm{CO}}_2+{\mathrm{SO}}_4^{2-}$, What are the elements that undergo oxidation?

Which of the following is a redox reaction?

${\mathrm{Zn}}_{\left(\mathrm{s}\right)} + {{\mathrm{CuSO}}_4}_{\left(\mathrm{aq}\right)} \to {{\mathrm{ZnSO}}_4}_{\left(\mathrm{aq}\right)} + {\mathrm{Cu}}_{\left(\mathrm{s}\right)}$

Above reaction is an example of:

Which gas is evolved when ${\mathrm{PbO}}_2$ is treated with concentrated ${\mathrm{HNO}}_3$?

In the reaction

${\mathrm{SO}}_2+2{\mathrm{H}}_2\mathrm{S}⟶3\mathrm{S}+2{\mathrm{H}}_2\mathrm{O}$

 the substance oxidised is:

In the reaction

${\mathrm{SO}}_2+2{\mathrm{H}}_2 \mathrm{S}\to 3 \mathrm{S}+2{\mathrm{H}}_2\mathrm{O}$ the substance oxidised is