Embibe Experts Solutions for Chapter: Redox Reactions, Exercise 1: JEE Main - 19th April 2014

For kinetic study of the reaction of iodide ion with ${\mathrm{H}}_2{\mathrm{O}}_2$ at room temperature :

(A) Always use freshly prepared starch solution.

(B) Always keep the concentration of sodium thiosulphate solution less than that of $\mathrm{KI}$ solution.

(C) Record the time immediately after the appearance of blue colour.

(D) Record the time immediately before the appearance of blue colour.

(E) Always keep the concentration of sodium thiosulphate solution more than that of $\mathrm{KI}$ solution.

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?

An indicator ‘$\mathrm{X}$’ is used for studying the effect of variation in concentration of iodide on the rate of reaction of iodide ion with ${\mathrm{H}}_2{\mathrm{O}}_2$ at room temp. The indicator ‘$\mathrm{X}$’ forms blue colored complex with compound ‘$\mathrm{A}$’ present in the solution. The indicator ‘$\mathrm{X}$’ and compound ‘$\mathrm{A}$’ respectively are

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

When ${\mathrm{Cu}}^{2+}$ ion is treated with $\mathrm{KI}$, a white precipitate, $\mathrm{X}$ appears in solution. The solution is titrated with sodium thiosulphate, the compound $\mathrm{Y}$ is formed. $\mathrm{X}$ and $\mathrm{Y}$ respectively are

Incorrect statement for the use of indicator in acid-base titration is:

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : An aqueous solution of $\mathrm{KOH}$ when for volumetric analysis, its concentration should be checked before the use.

Reason (R) : On aging,$\mathrm{KOH}$ solution absorbs atmospheric ${\mathrm{CO}}_2$.

In the light of the above statements, choose the correct answer from the options given below.