Embibe Experts Solutions for Chapter: Redox Reactions, Exercise 1: JEE Advanced Paper 1 - 2014

Ozonolysis of ${\mathrm{ClO}}_2$ produces an oxide of chlorine. The average oxidation state of chlorine in this oxide is ______.

Give your answer as the nearest integer.

Choose the correct statement(s) among the following.

To measure the quantity of ${\mathrm{MnCl}}_2$ dissolved in an aqueous solution, it was completely converted to ${\mathrm{KMnO}}_4$ using the reaction,

${\mathrm{MnCl}}_2+{\mathrm{K}}_2{\mathrm{S}}_2{\mathrm{O}}_8+{\mathrm{H}}_2\mathrm{O}\to {\mathrm{KMnO}}_4+{\mathrm{H}}_2{\mathrm{SO}}_4+\mathrm{HCl}$ (equation not balanced). Few drops of concentrated $\mathrm{HCl}$ were added to this solution and gently warmed. Further, oxalic acid $\left(225 \mathrm{mg}\right)$) was added in portions till the colour of the permanganate ion disappeared. What is the quantity of ${\mathrm{MnCl}}_2$ (in mg) present in the initial solution? (Atomic weights in $\mathrm{g}\mathrm{ }{\mathrm{mol}}^{-1}:\mathrm{ }\mathrm{Mn}=55, \mathrm{Cl}=35.5$)

$5.00 \mathrm{mL}$ of $0.10 \mathrm{M}$ oxalic acid solution taken in a conical flask is titrated against $\mathrm{NaOH}$ from a burette using phenolphthalein indicator. The volume of $\mathrm{NaOH}$ required for the appearance of permanent faint pink colour is tabulated below for five experiments. The concentration, in molarity, of the $\mathrm{NaOH}$ solution is $\mathrm{xM}$.

What is the value of $100\mathrm{x}$? 

Round of your answer to the nearest integer.

For the reaction:

${\mathrm{I}}^{-}+\mathrm{C}\mathrm{l}{\mathrm{O}}_3^{-}+{\mathrm{H}}_2\mathrm{S}{\mathrm{O}}_4\to \mathrm{C}{\mathrm{l}}^{-}+\mathrm{H}\mathrm{S}{\mathrm{O}}_4^{-}+{\mathrm{I}}_2\mathrm{ }$

The correct statement(s) in the balanced equation is/are: