Chemistry · JEE

Preparation, properties and uses of K2Cr2O7 and KMnO4 Concepts for JEE

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Quick answer

Master Preparation, properties and uses of K2Cr2O7 and KMnO4 by understanding definitions, standard results, and typical JEE question patterns — then practise with syllabus-aligned MCQs on Goodmarks.

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Concept explainer

Preparation, properties and uses of K2Cr2O7 and KMnO4 is a core JEE Main Chemistry subtopic under d and f-Block Elements. Master the definitions, standard results, and typical MCQ patterns tested in JEE Main and Advanced.

Key points

Understand the definition and scope of Preparation, properties and uses of K2Cr2O7 and KMnO4 in the JEE syllabus
Memorise key formulas and standard results linked to Preparation, properties and uses of K2Cr2O7 and KMnO4
Practise 20–40 syllabus-aligned MCQs with step-by-step solutions

JEE tips

Revise Preparation, properties and uses of K2Cr2O7 and KMnO4 with a one-page formula sheet before attempting mixed tests
After each practice set, log mistakes specific to Preparation, properties and uses of K2Cr2O7 and KMnO4 and reattempt after 48 hours

Common trap

Students often rush Preparation, properties and uses of K2Cr2O7 and KMnO4 questions without checking units, sign conventions, or boundary conditions — always verify assumptions before calculating.

Syllabus context

Part of d and f-Block Elements in JEE Main Chemistry.

Free sample questions

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Q1ChemistryUnit 11: d and f-Block Elements

In the purification of zirconium by Van Arkel process which halogen is used?

Q2ChemistryUnit 11: d and f-Block Elements

Which of the following reagents is used to test the presence of

S O_{2}

gas?

Q3ChemistryUnit 11: d and f-Block Elements

A C r O_{4}^{2-}

solution turns from yellow to another color upon addition of acid. What is the another color?

Q4ChemistryUnit 11: d and f-Block Elements

In the dichromate anion

C r_{2} O_{7}

Q5ChemistryUnit 11: d and f-Block Elements

Which represents correct comparison of the stability of ions?

Q6ChemistryUnit 11: d and f-Block Elements

What changes occur when acidified

C r_{2} O_{7}^{2-}

ion reacts with

H_{2} O_{2}

solution in presence of ether solvent?

Q7ChemistryUnit 11: d and f-Block Elements

Assertion

\boldsymbol{S O}_{2}

turns acidified

\boldsymbol{K}_{2} \boldsymbol{C r}_{2} \boldsymbol{O}_{7}

green Reason

K_{2} C r_{2} O_{7}

is reduced to

C r^{3+}(\text { green })

salt by

S O_{2}

Q8ChemistryUnit 11: d and f-Block Elements

To an acidified dichromate solution, a pinch of

N a_{2} O_{2}

and ether is added and shaken.What is observed?

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