Test: Diazonium Salts


20 Questions MCQ Test Chemistry Class 12 | Test: Diazonium Salts


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This mock test of Test: Diazonium Salts for Class 12 helps you for every Class 12 entrance exam. This contains 20 Multiple Choice Questions for Class 12 Test: Diazonium Salts (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Diazonium Salts quiz give you a good mix of easy questions and tough questions. Class 12 students definitely take this Test: Diazonium Salts exercise for a better result in the exam. You can find other Test: Diazonium Salts extra questions, long questions & short questions for Class 12 on EduRev as well by searching above.
QUESTION: 1

Benzene diazonium chloride when reacts with hypophosphorus acid produces

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QUESTION: 2

p-amino azo benzene is obtained by treating diazoniumchloride with:

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QUESTION: 3

When hypophosphorous acid is treated with diazonium salts, it is reduced to:

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QUESTION: 4

 Which of the following amine will form stable diazonium salt at 273-283 K ?

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QUESTION: 5

Replacement of diazo group by other groups is helpful in preparing those substituted aromatic compounds which cannot be prepared by

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QUESTION: 6

ArN+ Cl   ArX + N2 is called as:

Solution:

This reaction is called Gattermann reaction. In this reaction, Cl, Br and CN can be introduced into the benzene ring by simply treating diazonium salts with HCl, HBr, KCN. Respectively in presnce of copper powder instead of using Cu(I) salts.

QUESTION: 7

Which of the following amine gives diazonium salt on reaction with HNO2?

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QUESTION: 8

On heating an aliphatic primary amine with chloroform and ethanolic potassium hydroxide, the organic compound formed is 

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QUESTION: 9

 What happens when benzene diazonium chloride is treated with potassium cyanide in presence of Cu powder?

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QUESTION: 10

 When ethanol is treated with benzene diazoniumchloride it forms:

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QUESTION: 11

The conversion of primary aromatic amines into diazonium salts is known as:

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QUESTION: 12

By treating diazonium salts with cuprous cyanide or KCN and copper powder it forms:

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QUESTION: 13

Benzene diazonium chloride forms orange red dye with:

Solution:

Benzene diazonium chloride forms orange red dye with resorcinol, Reaction of benzene diazonium chloride with resocinol in basic medium is a coupling reaction,in which p-hydroxyazobenzene is obtained .Which is nothing but orange dye.

QUESTION: 14

The stability of benzene diazonium salts is because of

Solution:

None of the errors that are pointed are correct.

Their stability is because of resonance. D is the correct answer.

 

What is the resonance structure of aromatic diazonium salt? - Quora

QUESTION: 15

 Azo-dye test is given by:

Solution:

This test is given by aromatic primary amines. Aromatic primary amines react with nitrous acid to form diazonium salts. These diazonium salts undergo coupling reaction with β-naphthol to form orange coloured azo dye.

QUESTION: 16

The general formula of Diazonium salt is:

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QUESTION: 17

When diazonium salt solution is treated with KI, it forms:

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QUESTION: 18

 Diazo coupling is useful to prepare:

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QUESTION: 19

Benzene diazonium chloride on reaction with phenol in weakly basic medium gives:

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QUESTION: 20

When diazonium salt solution is treated with water at a temperature of 283 K it forms?

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