Nitrogen Containing Organic Compounds MCQs [Organic Chemistry]

MCQs-based questions and answers on Nitrogen Containing Organic Compounds in organic chemistry.

Carbylamine reaction proceeds via the intermediate formation of

  1. Alkyl isocyanide
  2. Dichloro methylene
  3. Alkyl carbanion
  4. Chloride ion

Question’s Answer: Dichloro methylene

Which compounds would you use in order to obtain a crystalline derivative of an aromatic amine?

  1. Benzoyl chloride
  2. Nitrous acid
  3. 2, 4-Dinitrophenyl hydrazine
  4. None of these

Question’s Answer: Benzoyl chloride

The reason why phenylamine is a much weaker base than ammonia when each is in aqueous solution is that

  1. The benzene ring has a tendency to increase the acidity of its substituent
  2. The phenylamine molecule is too large to capture hydrogen ion easily
  3. Phenylamine is much less soluble in water than is ammonia
  4. The lone pair of electrons on two nitrogen atom of phenylamine is delocalised over the benzene ring

Question’s Answer: The lone pair of electrons on two nitrogen atom of phenylamine is delocalised over the benzene ring

Reaction at 0°C between aniline, NaNO2 and HCl is known as

  1. Nitration
  2. Diazotisation
  3. Sandmeyer’s reaction
  4. Halogenation

Question’s Answer: Diazotisation

The decreasing order of the basic character of the amines and ammonia is

  1. NH3 > CH3NH2 > C₂H5NH2 > C6H5NH2
  2. C6H5NH2 > C₂H5NH2 > CH3NH2> NH3
  3. C₂H5NH2> CH3NH2 > NH3 > C6H5NH2
  4. CH3NH2> C₂H5NH2 > C6H5NH2 > NH3

Question’s Answer: C₂H5NH2> CH3NH2 > NH3 > C6H5NH2

Which on reaction with chloroform and KOH produces carbylamine

  1. R2NH
  2. R3N
  3. RNH2
  4. All of A, B, and C

Question’s Answer: RNH2

The most basic compound among following

  1. p-Nitroaniline
  2. Aniline
  3. Acetanilide
  4. Benzylamine

Question’s Answer: Benzylamine

Which reagent can make distinction between primary and secondary amine?

  1. NaNO2/HCI
  2. NH3
  3. HCI
  4. All of A, B, and C

Question’s Answer: NaNO2/HCI

A compound with NaOH gives NH3, it can be _____ .

  1. A nitro compound
  2. An amine
  3. An acid amide
  4. A substituted acid amide

Question’s Answer: An acid amide

a-Amino acetic acid with HNO, forms which of the followings?

  1. Oxalic acid
  2. Glycolic acid
  3. Acetic acid
  4. Nitroacetic acid

Question’s Answer: Glycolic acid

CH3CH2-CH2NH2 with chloroform and KOH (alc.) forms which of the following?

  1. CH3CH2CH2CN
  2. CH3CH2CH2NO₂
  3. CH3CH2CH2-Cl
  4. CH3CH2CH2NC

Question’s Answer: CH3CH2CH2NC

An aromatic compound containing ‘N’ is insoluble in water and soluble in HCl; with CHCl3 and KOH alc. Gives obnoxious smell, the compound is

  1. Nitrite
  2. 1° amine
  3. 3° amine
  4. 2° amine

Question’s Answer: 2° amine

Which of the substances react with nitrous acid to give an alcohol?

  1. (C2H3) 2NH
  2. C2H5NH2
  3. C6H5NH2
  4. Both A and C

Question’s Answer: C2H5NH2

Which compound will form zwitter ion?

  1. Glycine
  2. 4-aminophenol
  3. 4-amino benzoic acid
  4. Acetamide

Question’s Answer: Glycine

How Ethylamine and amiline can be distinguished?

  1. Hinsberg’s tent
  2. Carbylamine test
  3. Liebermann’s nitrosoamine test
  4. Dye test

Question’s Answer: Dye test

Which compounds contain nitrogen

  1. Proteins
  2. Diazonium salts
  3. Amines
  4. All of A, B, and C

Question’s Answer: Amines

Reactions in which aldehydes and ketones can be converted to amines through catalytic reduction in the presence of ammonia or amine are called

  1. Amination
  2. Reductive amination
  3. Reduction
  4. Oxidation

Question’s Answer: Reductive amination

Which methods is used for the synthesis of primary amine?

  1. Kolbe reaction
  2. Hofmann reaction
  3. Gabrial synthesis
  4. None of A, B, and C

Question’s Answer: Gabrial synthesis

Aniline on reaction with acetyl chloride gives A, which on reaction with Br-water followed by hydrolysis would give

  1. 2-bromoaniline and 4-bromoaniline
  2. 2,4-dibromoaniline
  3. 2,4,6-tribromoaniline
  4. 3-bromoaniline

Question’s Answer: 2-bromoaniline and 4-bromoaniline

Amines can be prepared by reduction of nitriles with hydrogen and catalyst

  1. Ni
  2. LIAIH3
  3. Ptc
  4. All of A, B, and C

Question’s Answer: All of A, B, and C

Which factors affect the basicity of amine?

  1. Effect of substituents
  2. Resonance effect
  3. Solvent
  4. All of A, B, and C

Question’s Answer: All of A, B, and C

C6H5NO₂→C6H6 the sequence of steps would be

  1. Reduction by sodium stannite
  2. Reduction Raney Nickel
  3. Reduction by Sn-HCl diazotization followed by reaction with H3PO2
  4. Reduction by Sn-HC followed by reaction with HCI

Question’s Answer: Reduction by Sn-HCl diazotization followed by reaction with H3PO2

Carbonyl compound + ‘X’ →Schiffs base: what is ‘X’?

  1. 1° amine
  2. 2° amine
  3. 3° amine
  4. amide

Question’s Answer: 1° amine

Which represents benzanilide?

  1. C6H5NHCOCH3
  2. CH3NHCO C6H5
  3. C6H5NHCO C6H5

Question’s Answer: C6H5NHCO C6H5

Triethylamine though expected to be more basic than diethylamine is actually less basic, this is due to

  1. Decrease electron density at ‘N’
  2. High volatility of 3° amine
  3. Less stabilization of the cation of the 3° amine than the cation of 2° amine
  4. Less solubility of 3° amines than 2° amines

Question’s Answer: High volatility of 3° amine

Which is stronger base?

  1. Ammonia
  2. Methylamine
  3. Dimethylamine
  4. Ethylamine

Question’s Answer: Dimethylamine

The formula C3H9N may show _____.

  1. 1°, 2° and 3° amine
  2. 2° and 3° amines
  3. 1° amine only
  4. 1° and 2° amines

Question’s Answer: 1°, 2° and 3° amine

The compound which on reaction with HNO, at room temperature produces an oily compound is

  1. Methylamine
  2. Diethylamine
  3. Triehtylamine
  4. Ethylamine

Question’s Answer: Diethylamine

A quaternary ammonium hydroxide on heating at above 100°C undergoes decomposition to give tertiary amine and alcohol is called

  1. Hofmann degradation
  2. Reductive elimination
  3. Exhaustive methylation
  4. Acylation

Question’s Answer: Hofmann degradation

Which amine is more basic in aqueous media?

  1. CH3NH2
  2. (CH3)3N
  3. (CH3)2NH
  4. (CH3)4NBr

Question’s Answer: (CH3)2NH

Schiff’s bases are produced by the reaction of aniline with

  1. Aldehydes
  2. Alcohols
  3. Amides
  4. Alkyl halides

Question’s Answer: Aldehydes

C6H5CONH₂+ HNO₂ – A+ B; What will be the products?

  1. Phenol and ammonia
  2. Benzoic acid and ammonia
  3. Phenol and nitrogen
  4. acid and nitrogen

Question’s Answer: acid and nitrogen

Why Aniline does not give coupling reaction at pH < 5?

  1. Aniline converts into C6H5NH3CI which cannot couple.
  2. Diazonium salt converts into C6H5-N=N-Cl which cannot couple.
  3. Both A. and B.
  4. Coupling only takes place in basic medium

Question’s Answer: Aniline converts into C6H5NH3CI which cannot couple.

Which is the base with lowest pK, value?

  1. N≡CCH2NH2
  2. NH3
  3. Et3N
  4. HO–CH2CH2NH2

Question’s Answer: Et3N

Which factors decrease the basicity of aniline?

  1. -COOH
  2. -SOH
  3. -NO
  4. All of A, B, and C

Question’s Answer: All of A, B, and C

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