Prof. Anil Thomas and Prof. Santosh Yadav Solutions for Chapter: Redox Reactions, Exercise 3: Competitive Thinking

Which is the best description of the behaviour of bromine in the reaction given below?
${\mathrm{H}}_2\mathrm{O} + {\mathrm{Br}}_2\underset{}{\overset{ }{\to }} \mathrm{HOBr} + \mathrm{HBr}$                               

Which of the following chemical reactions depicts the oxidizing behaviour of ${\mathrm{H}}_2{\mathrm{SO}}_4$?
                                                                                                               

Hot concentrated sulphuric acid is a moderately strong oxidizing agent. Which of the following reactions does not show oxidising behaviour of sulphuric acid?                                               

In the balanced equation -
$5{\mathrm{H}}_2{\mathrm{O}}_2 + {\mathrm{xClO}}_2 + 2\mathrm{OH}¯\underset{}{\overset{}{\to }}\mathrm{xCl}¯+{\mathrm{yO}}_2 + 6{\mathrm{H}}_2\mathrm{O}$
Find $\mathrm{x} \text{and} \mathrm{y}.$

Consider the following reaction,
${\mathrm{xMnO}}_4^{-} + {\mathrm{yC}}_2{\mathrm{O}}_4^{2-} + {\mathrm{zH}}^{+}\underset{}{\overset{}{\to }} {\mathrm{xMn}}^{2+} + 2{\mathrm{yCO}}_2 + \mathrm{z} / 2{\mathrm{H}}_2\mathrm{O}$
The values of $\mathrm{x}, \mathrm{y}$ and $\mathrm{z}$ in the reaction are _______ respectively.

Following reaction describes the rusting of iron.
$4\mathrm{Fe} + 3{\mathrm{O}}_2\underset{}{\overset{ }{\to }} 4{\mathrm{Fe}}^{3+} + 6{\mathrm{O}}^{2-}$
Which one of the following statements is INCORRECT?

Which of the following is the most powerful oxidising agent?

Which of the following species can function both as oxidising as well as reducing agent?