In which of the following reactions, hydrogen peroxide acts an oxidizing agent?

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

Choose the correct answer from the options given below

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

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:

Which of the following options are correct for the reaction?

$2{\left[\mathrm{Au}(\mathrm{CN}{)}_2\right]}^{-}\left(\mathrm{aq}\right)+\mathrm{Zn}\left(\mathrm{s}\right)\to 2\mathrm{Au}\left(\mathrm{s}\right)+{\left[\mathrm{Zn}(\mathrm{CN}{)}_4\right]}^{2-}\left(\mathrm{aq}\right)$

A. Redox reaction

B. Displacement reaction

C. Decomposition reaction

D. Combination reaction

Choose the correct answer from the options given below: