JEE Main - 9th April 2016

In base vs. Acid titration, at the end point methyl orange is present as

Which of the given reactions is not an example of disproportionation reaction?

In the titration of ${\mathrm{KMnO}}_4$ and oxalic acid in acidic medium, the change in oxidation number of carbon at the end point is

The Plot of $\mathrm{pH}$-metric titration of weak base ${\mathrm{NH}}_4\mathrm{OH}$ vs strong acid $\mathrm{HCl}$ looks like

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

Choose the correct answer from the options given below

A compound '$\mathrm{X}$' is a weak acid and it exhibits colour change at $\mathrm{pH}$ close to the equivalence point during neutralization of $\mathrm{NaOH}$ with ${\mathrm{CH}}_3\mathrm{COOH}$. Compound '$\mathrm{X}$' exists in ionized form in basic medium. The compound '$\mathrm{X}$' is

In which of the following reactions the hydrogen peroxide acts as a reducing agent?

The number of electrons involved in the reduction of permanganate to manganese dioxide in acidic medium is _____ .