The steps, in one of the possible reaction mechanisms, corresponding to the preparation of acetone from isopropyl alcohol by using ${\mathrm{CrO}}_3$ and conc. ${\mathrm{H}}_2{\mathrm{SO}}_4$ are mentioned below.

Here, $\mathrm{Z}$ is ${\mathrm{H}}_3{\mathrm{O}}^{+},\mathrm{E}$ and $\mathrm{F}$ are $\mathrm{Cr}$-containing species, and Step $3$ is a disproportionation reaction. The correct statement(s) is/are

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: