Oxidation and Reduction

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?

Which of the following will act as both oxidising and reducing agent?

Which of the following is a redox reaction?

Among the following, identify the correct statement.

Write a reaction for the classical concept of the reduction.

Define reduction based on the classical concept.

The addition of the electropositive element is known as 

Define reduction in classical way.

Hydrogen gas acts as a

In which of the following reactions does the underlined species get oxidised?

Which of the following reactions involve both oxidation and reduction?

In the reaction: $2\mathrm{Na} + {\mathrm{Cl}}_2 \stackrel{}{\to } 2\mathrm{NaCl},$

Which of the following halogen oxides is used for the estimation of carbon monoxide in automobile exhaust gases?

A filter paper soaked in salt $\mathrm{X}$ turns brown when exposed to ${\mathrm{HNO}}_3$ vapor. The salt $\mathrm{X}$ is

When ${\mathrm{KMnO}}_4$ solution is added to oxalic acid solution, the decolourisation is slow in the beginning but becomes instantaneous after some time. This is because-

Standard reduction potential of silver and nickel are:

${\mathrm{E}}_{{\mathrm{Ag}}^{+}/\mathrm{Ag}}^0=0.8 \mathrm{V}$ and ${\mathrm{E}}_{{\mathrm{Ni}}^{2+}/\mathrm{Ni}}^0=-0.23 \mathrm{V}$

Which of the following statement is true?

Which of the following can act as oxidising as well as reducing agent depending on acidic and basic medium.

Which of the following is not a redox reaction?