Tag: nitroarenes- preparation and properties

Questions Related to nitroarenes- preparation and properties

Nitro benzene is used _________.

chemistry organic nitrogen compounds nitroarenes- preparation and properties nitro compounds types of organic reactions

  1. as a solvent

  2. In the manufacture of aniline

  3. In cheap scent

  4. All these

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Correct Option: D
Explanation:

It is a solvent because it can dissolve a large number of polar substances (polar aprotic solvent)
It can be used to manufacture aniline because it can be reduced by stephen's reduction to anniline
It is also used as a scent because it has pleasant odour

Nitrobenzene is used as a/an ____________.

chemistry organic nitrogen compounds nitroarenes- preparation and properties nitro compounds types of organic reactions

  1. reducing agent

  2. oxidizing agent

  3. nitrating agent

  4. neutralizing agent

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Correct Option: B
Explanation:

Nitrobenzene can itself be reduced to aniline, so it acts as an oxidising agent.

The well known explosive TNT stands for :

chemistry organic nitrogen compounds nitroarenes- preparation and properties nitro compounds types of organic reactions

  1. 2, 3, 6-Trinitrotoluene

  2. 3, 4, 5 -Trinitrotoluene

  3. 2, 3, 5 -Trinitrotoluene

  4. 2, 4, 6-Trinitrotoluene

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Correct Option: D

Nitro benzene is:
i) steam volatile 

ii) used as a solvent
iii) Aliphatic compounds 
Iv) lighter than water

chemistry organic nitrogen compounds nitroarenes- preparation and properties nitro compounds types of organic reactions

  1. (i) and (ii) are correct

  2. (iii) and (iv) are correct

  3. (i) and (iii) are correct

  4. (i) and (iv) are correct

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Correct Option: A
Explanation:

Nitro benzene is steam volatile and is used as solvent. But it is an aromatic compound and is heavier than water. 

Assertion (A) : Nitro benzene on nitration gives m-dinitro benzene.
Reason (R) : $NO _{2}$ group is meta directing group.

chemistry organic nitrogen compounds nitroarenes- preparation and properties nitro compounds types of organic reactions

  1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

  2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

  3. Assertion is correct and Reason is wrong.

  4. Assertion is wrong and Reason is correct.

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Correct Option: A
Explanation:

Nitro benzene on further nitration forms m - dinitro benzene as nitro group is meta directing group. Thus Assertion as well as Reason both are correct and Reason is correct explanation of Asseriton.

When nitrobenzene is heated with conc. $HNO _3$ and conc. $H _2SO _4$ the product would be obtained :-

chemistry organic nitrogen compounds nitroarenes- preparation and properties nitro compounds types of organic reactions

  1. D. N. B.

  2. T. N. T.

  3. D. D. T.

  4. T. E. L.

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Correct Option: A
$A\xrightarrow [ mix ]{ Nitrating } B\xrightarrow [ ]{ Sn/conc.HCI } aniline$

Statement: $A$ can be benzene.
chemistry organic nitrogen compounds nitroarenes- preparation and properties nitro compounds types of organic reactions

  1. True

  2. False

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Correct Option: A

$NO {2}^{+}$ is called ______.


chemistry organic nitrogen compounds nitroarenes- preparation and properties nitro compounds types of organic reactions

  1. Nitrite ion

  2. nitro group

  3. nitronium ion

  4. nitrate ion

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Correct Option: C
Explanation:

$NO _2^+$ is called nitronium ion

The reaction of diazonium salt with aniline is an example of 

chemistry organic nitrogen compounds nitroarenes- preparation and properties nitro compounds types of organic reactions

  1. Nucleophilic substitution reaction

  2. Electrophilic substitution reaction

  3. Nucleophilic addition reaction

  4. Elimination reaction

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Correct Option: A
Explanation:

The reaction of diazonium salt with aniline is an example of

A.  Nucleophilic substitution reaction

What is obtained when nitrobenzene is treated sequentially with (i) ${ NH } _{ 4 }Cl/Zn$ dust and (ii) ${ H } _{ 2 }{ SO } _{ 4 }/{ Na } _{ 2 }{ Cr } _{ 2 }{ O } _{ 7 }$ ?

chemistry organic nitrogen compounds nitroarenes- preparation and properties nitro compounds types of organic reactions

  1. Benzene

  2. Nitrosobenzene

  3. m-Chlorobenzene

  4. p-Chlorobenzene

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Correct Option: B
Explanation:

When Nitrobenzene first reacts with $NH _4Cl/Zn$ it forms phenyl hydroxylamine.

When this reacts with $H _2SO _4/ Na _2Cr _2O _7$ it gives Nitroso benzene as a product.