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3 Questions

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Quiz

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@WellRegardedZircon

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Questions and Answers

Which of the following statements is true regarding the use of KMnO4 and K2Cr2O7 as oxidising agents?

K2Cr2O7 can be used to oxidise primary alcohols directly to carboxylic acid (correct)

K2Cr2O7 can be used to oxidise aldehydes to primary alcohols

KMnO4 is a weaker oxidising agent than K2Cr2O7

KMnO4 can be used to oxidise primary alcohols to aldehydes

Which of the following is a characteristic of KMnO4?

It is a weaker oxidising agent than K2Cr2O7

It can be used to oxidise primary alcohols directly to carboxylic acids (correct)

It can be used to oxidise primary alcohols to aldehydes

It has a green colour which changes to red-orange

What is the reason why KMnO4 cannot be used to oxidise primary alcohols to aldehydes?

KMnO4 is not soluble in the reaction medium

The reaction will produce a ketone instead of an aldehyde

KMnO4 is not a strong enough oxidising agent

The oxidation will not stop at the aldehyde stage (correct)

Study Notes

Oxidising Agents

KMnO4 and K2Cr2O7 are both used as strong oxidising agents.
KMnO4 is a stronger oxidising agent than K2Cr2O7.

Characteristics of KMnO4

KMnO4 is a strong oxidising agent, especially in acidic medium.
KMnO4 oxidises primary alcohols to carboxylic acids, not aldehydes.

Limitation of KMnO4

KMnO4 cannot be used to oxidise primary alcohols to aldehydes because it is too strong and will oxidise the aldehyde further to a carboxylic acid.

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Description

Test your knowledge on the oxidizing properties of chemical compounds with our quiz! Learn about the differences between Potassium Manganate and Potassium Dichromate and their abilities to oxidize alcohols, aldehydes, and carboxylic acids. Sharpen your understanding of chemical reactions and their applications in various industries. Take the quiz now and become an expert in oxidation!