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 Multiple Choice QuestionsMultiple Choice Questions

1.

Which of following is the correct order of increasing reactivity?

  • RCOOR' < RCOCl < RCONH2

  • RCOOR' < RCONH2 < RCOCl

  • RCOCl < RCONH2 < RCOOR'

  • RCONH2 < RCOOR' < RCOCl


2.

A sample of CHCl3 before using as an anaesthetic is tested by

  • AgNO3 solution after boiling with KOH

  • Ammonical cuprous chloride

  • Fehling solution

  • AgNO3


3.

What is the name of reaction when benzaldehyde changes in to benzyl alcohol?

  • Cannizzaro's reaction

  • Wurtz reaction

  • Kolbe reaction

  • Friedel-Craft's reaction


4.

Gammexane is

  • benzene hexachloride

  • bromo benzene

  • benzyl chloride

  • chlorobenzene


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5.

Assertion: Phenol is a weaker acid than ethanol.
Reason: Groups with +M effect and -I effect decrease acidity at m-position.

  • If both assertion and reason are true and reason is a correct explanation of the assertion.

  • If both the assertion and reason are true but the reason is not a correct explanation of the assertion.

  • If the assertion is true but the reason is false.

  • If both the assertion and reason are false.


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6.

Aniline on treatment with HCl and NaNO2 gives

  • diazo salt

  • nitroaniline

  • chloroaniline

  • aminophenol


A.

diazo salt

When aniline is treated with HCl and NaNO2, it forms benzene diazonium chloride. Therefore, it gives diazo salt. 


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7.

Assertion: Ethers behave as bases in the presence of mineral acids.

Reason: It is due to the presence of a lone pair of electrons on the oxygen.

  • If both assertion and reason are true and the reason is a correct explanation of the assertion.

  • If both the assertion and reason are true but the reason is not a correct explanation of the assertion.

  • If the assertion is true but the reason is false.

  • If both the assertion and reason are false.


8.

Phenol , in Liebermann's nitroso test , give the colour :

  • red

  • yellow

  • blue

  • pink


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9.

Dehydration of alcohol involves

  • carbene

  • carbanion

  • free radical

  • carbonium ion


10.

What will be the product ,when carboxy phenol ,obtained by Reimer Tiemann's process ,is deoxidised with Zn powder ?


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