Seema Saini Solutions for Chapter: Some Basic Concepts, Mole Concept and Stoichiometry, Exercise 6: DPP 1.6

A mixture of $0.02 \mathrm{mole}$ of ${\mathrm{KBrO}}_3$ and $0.01 \mathrm{mole}$ of $\mathrm{KBr}$ was treated with excess of $\mathrm{KI}$ and acidified. The volume of $0.1 \mathrm{M} {\mathrm{Na}}_2{\mathrm{S}}_2{\mathrm{O}}_3$ solution required to consume the liberated iodine will be:

Which of the following are not valid reactions for iodometric titrations?

$100 \mathrm{mL}$ of $0.1 \mathrm{M} {\mathrm{NaHC}}_2{\mathrm{O}}_4$ is neutralised by $\mathrm{mL}$ of $0.1 \mathrm{M} \mathrm{NaOH}$ and ${\mathrm{V}}_2 \mathrm{mL}$ of a $\mathrm{M} {\mathrm{KMnO}}_4$separately, then for complete neutralisation:

A mixture of ${\mathrm{Na}}_2{\mathrm{C}}_2{\mathrm{O}}_4$ and ${\mathrm{H}}_2{\mathrm{C}}_2{\mathrm{O}}_2$ requires $100 \mathrm{mL}$ of $0.1 \mathrm{M} {\mathrm{KMnO}}_4$ for complete neutralisation. The same mixture on neutralisation by a base requires $50 \mathrm{mL}$ of $0.2 \mathrm{M} \mathrm{NaOH}$ solution. For these reactions which of the following are correct? 

Reduction of the metal centre in aqueous permanganate ion involves:
 

Which of the following samples of reducing agents is/are chemically equivalent to $25 \mathrm{ml}$ of $0.2 \mathrm{N} {\mathrm{KMnO}}_4$ to be reduced to ${\mathrm{Mn}}^{+2}$and water? 

In the titration of ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_2$ and ferrous sulphate, following data is obtained: 

${\mathrm{V}}_1 \mathrm{mL}$ of ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_2$ solution of molarity ${\mathrm{M}}_1$ requires ${\mathrm{V}}_2 \mathrm{mL}$ of ${\mathrm{FeSO}}_4$ solution of molarity ${\mathrm{M}}_2$.

Which of the following relations is/are true for the above titration? 

$0.1\mathrm{M}$ solution of $\mathrm{KI}$ reacts with excess of ${\mathrm{H}}_2{\mathrm{SO}}_4$ and ${\mathrm{KIO}}_3$ solutions, according to equation $5{\mathrm{I}}^{-}+{\mathrm{IO}}_3^{-}+6{\mathrm{H}}^{+}⟶3{\mathrm{I}}_2+3{\mathrm{H}}_2\mathrm{O}$; which of the following statements is/are correct?