How many moles of iodine are liberated when $2$ moles of potassium permanganate react with potassium iodide?

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Important Questions on Redox Reactions

EASY

11th CBSE

IMPORTANT

Pradeep's New Course CHEMISTRY Vol.II>Chapter 8 - Redox Reactions>COMPETITION FOCUS>Q 97

Reaction of

{Br}_{2}

with

{Na}_{2} {CO}_{3}

in aqueous solution gives sodium bromide and sodium bromate with evolution of

{CO}_{2}

gas. The number of sodium bromide molecules involved in the balanced chemical equation is

HARD

11th CBSE

IMPORTANT

Pradeep's New Course CHEMISTRY Vol.II>Chapter 8 - Redox Reactions>COMPETITION FOCUS>Q 98

Consider the following list of reagents: Acidified

K_{2} {Cr}_{2} O_{7},

alkaline

{KMnO}_{4},

{CuSO}_{4},

H_{2} O_{2},

{Cl}_{2}

,

O_{3}

,

{FeCl}_{3}

,

{HNO}_{3}

. The total number of reagents that can oxidise aqueous iodide to iodine are

HARD

11th CBSE

IMPORTANT

Pradeep's New Course CHEMISTRY Vol.II>Chapter 8 - Redox Reactions>COMPETITION FOCUS>Q 99

How many grams of potassium dichromate are required to oxidise $20.0 g$ of ${Fe}^{2 +}$ in ${FeSO}_{4}$ to ${Fe}^{3 +}$ if the reaction is carried out in an acidic medium ? (Molar mass of $K_{2} {Cr}_{2} O_{7}$ and ${FeSO}_{4}$ are $294$ and $152$ respectively)