Identify the pair of reactions undergoing disproportionation from the following.

In which one of the following sets all species show disproportionation reaction?

Write an activity the following chemical reactions.

Chemical displacement reaction.

Upon dipping a copper rod, the aqueous solution of the salt that can turn blue is:

At $298 \mathrm{K}$, the standard electrode potentials of ${\mathrm{Cu}}^{2+}/\mathrm{Cu}, {\mathrm{Zn}}^{2+}/\mathrm{Zn}, {\mathrm{Fe}}^{2+}/\mathrm{Fe}$ and ${\mathrm{Ag}}^{+}/\mathrm{Ag}$ are $0.34 \mathrm{V}$, $-0.76 \mathrm{V}$, $-0.44 \mathrm{V}$ and $0.80 \mathrm{V}$, respectively.

On the basis of standard electrode potential, predict which of the following reaction cannot occur?

Match List-I with List-II, match the gas evolved during each reaction.

Choose the correct answer from the options given below

Which of the following reactions are disproportionation reaction?

$\left(a\right)$ $2\mathrm{C}{\mathrm{u}}^{+}\to \mathrm{C}{\mathrm{u}}^{2+}+\mathrm{C}{\mathrm{u}}^0$

$\left(b\right)$ $3\mathrm{M}\mathrm{n}{\mathrm{O}}_4^{2-}+4{\mathrm{H}}^{+}\to 2\mathrm{M}\mathrm{n}{\mathrm{O}}_4^{-}+\mathrm{M}\mathrm{n}{\mathrm{O}}_2+2{\mathrm{H}}_2\mathrm{O}$

$\left(c\right)$ $2\mathrm{K}\mathrm{M}\mathrm{n}{\mathrm{O}}_4\stackrel{∆}{\to }{\mathrm{K}}_2\mathrm{M}\mathrm{n}{\mathrm{O}}_4+\mathrm{M}\mathrm{n}{\mathrm{O}}_2+{\mathrm{O}}_2$

$\left(d\right)$ $2\mathrm{M}\mathrm{n}{\mathrm{O}}_4^{-}+3\mathrm{M}{\mathrm{n}}^{2+}+2{\mathrm{H}}_2\mathrm{O}\to 5\mathrm{M}\mathrm{n}{\mathrm{O}}_2+4{\mathrm{H}}^{\oplus }$

Select the correct option from the following: