Tag: organic compounds containing nitrogen

Quizzes (3) Questions (25)

Questions Related to organic compounds containing nitrogen

Multiple choice chemistry organic compounds containing nitrogen chemical reactions of diazonium salts chemical properties of diazonium salts diazonium salts

Cyanide group on hydrolysis give:

  1. acid

  2. acetamide

  3. amine

  4. hydrate
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
$\displaystyle \underset{Cyanide}{RCN} \xrightarrow{H _2O} \underset{Amide}{RCONH _2}   \xrightarrow{H _2O} \underset{Acid}{RCOOH} + \underset{Ammonia}{NH _3}$
$\therefore $ Hydrolysis of cyanide results in formation of acid.
Multiple choice chemistry organic compounds containing nitrogen chemical reactions of diazonium salts chemical properties of diazonium salts diazonium salts

The reagent commonly used to determine hardness of water titrimetrically is:

  1. Oxalic acid

  2. Disodium salt of EDTA

  3. Sodium citrate

  4. Sodium thiosulphate

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The total hardness of water (i.e. the concentration of dissolved cations such as $Ca^{2+}, Mg^{2+}, Fe^{3+}$ etc.) is commonly determined by the titration of a water sample with a standardized solution of the disodium salt of ethylenediaminetetraacetic acid (EDTA) using eriochrome black T or calmagite as an indicator. Calmagite has the advantage of forming indefinitely stable solutions and will be substituted without any other modification to the procedure.
Hence option B is correct.

Multiple choice chemistry organic compounds containing nitrogen chemical reactions of diazonium salts chemical properties of diazonium salts diazonium salts

Shweta found her pet's cloth discoloured and decided to renovate the dress by colouring it. Which of the following solution of compound should she choose to do so?

  1. Ammonia

  2. Ester

  3. Diazonium salts

  4. Aldehyde
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Diazonium salts are used for making azo dye at lone temperature by coupling with $\beta$-naphthol or any other alcohol. and is used for dyeing clothes.

Multiple choice chemistry organic compounds containing nitrogen chemical reactions of diazonium salts chemical properties of diazonium salts diazonium salts

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

  1. ester

  2. alcohol

  3. amines

  4. phenol
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When an aqueous solution of an aromatic diazonium salt is warmed (often at temperatures around 283-300 K), it undergoes hydrolysis to form phenol and nitrogen gas.

Multiple choice chemistry organic compounds containing nitrogen chemical reactions of diazonium salts chemical properties of diazonium salts diazonium salts

Which of the following is correct method to convert p-toluidine to p-toluic acid?

  1. $ Diazotisation, \, CuCN, \, H _2/Pd$
  2. $CHCl _3/NaOH,\, KCN, \, Sn/HCl$
  3. $ Diazotisation, \, CuCN/KCN, H _2O/H^+$
  4. $ Diazotisation, \, NaCN, \, NaOH$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

To convert p-toluidine to p-toluic acid, one must diazotize the amine, replace the diazonium group with a cyano group using CuCN, and then hydrolyze the nitrile to a carboxylic acid.

Multiple choice distinction between pairs of amines organic compounds containing nitrogen organic compounds with functional group containing nitrogen chemistry

Aniline and N-methylaniline can be distinguished by using the:
(A) Hoffman Mustard oil reaction
(B)  Hinsberg reagent
(C)  Carbylamine test
(D)   Mulliken Test

  1. B and C

  2. C only

  3. A, B and C

  4. A, B, C and D
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Aniline is a primary amine, while N-methylaniline is a secondary amine. The Carbylamine test (C) is specific to primary amines, and the Hinsberg reagent (B) reacts differently with primary and secondary amines, making both useful for distinction.

Multiple choice distinction between pairs of amines organic compounds containing nitrogen organic compounds with functional group containing nitrogen chemistry

Nitration of acetanilide followed by hydrolysis gives

  1. Ortho nitro aniline

  2. Para nitroaniline

  3. Ortho and para nitroaniline

  4. Ortho nitro anilinium ion
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Acetanilide is nitrated to form p-nitroacetanilide because the acetamido group is bulky, directing substitution to the para position. Subsequent hydrolysis of the amide group yields para-nitroaniline.

Multiple choice distinction between pairs of amines organic compounds containing nitrogen organic compounds with functional group containing nitrogen chemistry

The reaction between primary amine, chloroform and few drops of alcoholic KOH is known as: 

  1. Hofmann's reaction

  2. Reimer-Tiemann's reaction

  3. Carbylamine reaction

  4. Kolbe's reaction
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Carbylamine reaction:
$C{ H } _{ 3 }C{ H } _{ 2 }N{ H } _{ 2 }+CH{ Cl } _{ 3 }+3KOH\longrightarrow C{ H } _{ 3 }C{ H } _{ 2 }NC+3KCl+3{ H } _{ 2 }O$
It forms isocyanide.
Multiple choice distinction between pairs of amines organic compounds containing nitrogen organic compounds with functional group containing nitrogen chemistry

Aniline and diphenylamine may be distinguished by:

  1. lassaignes test

  2. schiffs test

  3. carbyl amine reaction

  4. solubility test
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Aniline and diphenylamine may be distinguished by carbylamine reaction.
Aniline is a primary amine and diphenylamine is a secondary amine.
carbylamine reaction is given by primary amines. It is not given by secondary or tertiary amines.
In Hoffmann's carbylamine test (also known as Isocyanide test), aliphatic or aromatic primary amine is heated with chloroform  in presence of alcoholic potassium hydroxide to give foul smelling alkyl/aryl  isocyanide or carbylamine.
$\underset {} {C _6H _5-NH _2} + CHCl _3  + 3KOH  \xrightarrow {heat} C _6H _5-NC  + 3KCl + 3H _2O$