Dr. S.N. DHAWAN, Dr. S.C.KHETERPAL and, P.N.KAPIL Solutions for Chapter: Redox Reactions, Exercise 2: TEST YOUR GRIP

Bromine water reacts with ${\mathrm{SO}}_2$ to form

A standard hydrogen electrode has zero electrode potential because

If the half cell reactions are given as
(i) ${\mathrm{Fe}}^{2+}\left(\mathrm{aq}\right)+2{\mathrm{e}}^{–}\to \mathrm{Fe}\left(\mathrm{s}\right); \mathrm{E}°=–0.44\mathrm{V}$
(ii) $2{\mathrm{H}}^{+}\left(\mathrm{aq}\right)+\frac{1}{2}{\mathrm{O}}_2\left(\mathrm{g}\right)+2{\mathrm{e}}^{–}\to {\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right); \mathrm{E}°=+1.23\mathrm{V}$
The $\mathrm{E}°$ for the reaction (In Volts), $\mathrm{Fe}\left(\mathrm{s}\right)+2{\mathrm{H}}^{+}\left(\mathrm{aq}\right)+\frac{1}{2}{\mathrm{O}}_2\left(\mathrm{g}\right)\to {\mathrm{Fe}}^{2+}\left(\mathrm{aq}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)$ is

The compound  ${\mathrm{YbBa}}_2{\mathrm{Cu}}_3{\mathrm{O}}_7$ which shows superconductivity, has copper in oxidation state _____ $\left(-\frac{7}{3}/+\frac{7}{3}\right)$. Assume that the rare earth element ytterbium is in the usual $+3$ oxidation state.

When the oxidation number of an element is maximum, it can act only as _____. (Reducing agent/Oxidizing agent)

The compound in which oxidation number of oxygen is $+2$ is _____.

$\left(\mathrm{A}\right) {\mathrm{OF}}_2/\left(\mathrm{B}\right) {\mathrm{O}}_2{\mathrm{F}}_2$.

Enter your correct answer as A or B.

In an electrochemical cell consisting of zinc electrode and normal hydrogen electrode, zinc electrode acts as _____.

Salt bridge maintains electrical _____ in the solutions of two half-cells.