CBSE Class 12 Chemistry Organic Compounds Containing Nitrogen Worksheet

Question: The hybridisation and geometry of amines are sp3 and pyramidal respectively due to the presence of
a) divalent N-atom
b) trivalent N-atom
c) monovalent N-aom
d) tetravalent N-atom

Answer: b

Question: Which of the following reactions is appropriate for converting acetamide to methanamine?
a) Carbylamine reaction
b) Hofmann bromamide reaction
c) Stephen’s reaction
d) Gabriel’s phthalimide synthesis

Answer: b

Question: If one H-atom of ammonia is replaced by alkyl group, the amine, thus obtained is known as
a) secondary amine
b) primary amine
c) tertiary amine
d) quaternary amine

Answer: b

Question: Which of the following is an aromatic amine?
a) Aniline
b) N-methyl aniline
c) 2-phenyl ethanamine
d) None of the above

Answer: a

Question: Which of the following can be prepared using Gabriel phthalimide synthesis?
a) Primary aromatic amines
b) Secondary amines
c) Primary aliphatic amines
d) Tertiary amines

Answer: c

Question: Ethylamine (C₂H₅HN₂)    can be obtained from N-ethylphthalimide on treatment with
a) NaBH₄
b) NH₂NH₂
c) H₂O 
d) CaH₂

Answer: b

Question: Amines behave as a nucleophile because of
a) the presence of unshared pair of electrons on N-atom
b) the absence of unshared pair of electrons on N-atom
c) the vacant p-orbital of N-atom
d) All of the above

Answer: a

Question: What is the correct order of reactivity of halides with amines?
a) RCl > RBr > RI
b) RI > RBr > RCl
c) RCl > RI > RBr
d) RI > RCl > RBr

Answer: b

Question: Amines on treatment with acids yield salt because they are
a) basic in nature
b) acidic in nature
c) amphoteric in nature
d) None of these

Answer: a

Question: What is the bond angle of C—N—E (E = C or H) in case of trimethylamine?
a) 109.5°
b) More than 109.5°
c) 108°
d) 90°

Answer: c

Question: The correct order of the basic strength of methyl substituted amines in aqueous solution is
a) (CH₃)₃ N > CH₃NH₂ > (CH₃)₂NH
b) (CH₃)₃ N > (CH₃)₂NH > CH₃NH₂
c) CH₃NH₂ > (CH₃)₂NH > (CH₃)₂N
d) (CH₃)₂ NH> CH₃NH₂ > (CH₃)₃N

Answer: d

Question: The chemical formula of Hinsberg’s reagent is
a) HNO₂
b) NaOH+ CaO
c) C₆H₅SO₂Cl   
d) CH₃CONH₂

Answer: c

Question: Aniline is more stable than anilinium ion because
a) it has more resonating structures.
b) it has less resonating structures.
c) it has more p-bonding.
d) it has less p-bonding

Answer: a

Question: The carbylamine reaction is given by
a) (C₂H₅)₃N  
b) (C₂H₅)₂NH   
c) C₂H₅NH₂
d) C₃H₇NHC₂H₅

Answer: c

Question: —NH₂ group in aniline is activating group and, hence reaction occurs at
a) para position
b) ortho position
c) meta position
d) Both (a) and (b)

Answer: d

Question: Which of the following can form H-bond?
a) NH₃
b) R—CH₃
c) R—O—R
d) R—Br

Answer: a

Question: Aniline does not undergo Friedel-Crafts reaction due to
a) less reactivity of aniline
b) salt formation with AlCl₃
c) electron accepting effect of—NH₂ group present in aniline
d) None of the above

Answer: b

Question: The reagent used to form aryl fluoride from arene diazonium chloride is
a) HF
b) KF
c) HBF₄
d) None of these

Answer: c

Question: Which of the following amine will form stable diazonium salt at 273-278 K?
a) C₂H₅NH₂
b) C₆H₅NH₂
c) C₆H₅CH₂NH₂
d) C₆H₅N(CH₃)₂

Answer: b

Question: Name the product(s) formed during the reaction of primary aliphatic amines with nitrous acid at room temperature?
a) R NO₂
b) ROH
c) Both (a) and
b) d) None of these

Answer: b

Question: Which of the following compound is water insoluble and stable at room temperature?
a) Benzene diazonium chloride
b) Benzene diazonium fluoroborate
c) Both (a) and (b)
d) None of the above

Answer: b

Question: Coupling reaction is an example of
a) nucleophilic addition reaction.
b) nucleophilic substitution reaction.
c) electrophilic substitution reaction.
d) electrophilic addition reaction.

Answer: c

CBSE Class 12 Chemistry Organic Compounds containing Nitrogen. Students can download these worksheets and practice them. This will help them to get better marks in examinations. Also refer to other worksheets for the same chapter and other subjects too. Use them for better understanding of the subjects.

CLASS XII CHAPTER – ORGANIC COMPOUNDS CONTAINING NITROGEN ONE MARK QUESTIONS

1.

Why do amines react as nucleophiles? (2007)

2.

Write a chemical reaction in which the iodide ion replaces the diazonium group in a diazonium salt. (2008)

3.

Give the IUPAC name of H2N-CH2-CH2CH=CH2 (2010)

4.

Why is an alkylamine more basic than ammonia? (2011)

TWO MARK QUESTIONS

1.

Effect the following conversions:

a) Aniline to p-nitro aniline

b) Benzyl bromide to 2-Phenyl ethanamine

c) Acetaldehyde to ethyl amine

d) Nitro Benzene to Benzene

e) Methyl cyanide to acetone

2.

Account for the following:

a) Diazonium salts of aromatic amines are more stable than those of aliphatic amines.

b) Amines are more basic than alcohols of comparable molecular masses.(2011)

THREE MARK QUESTIONS

1.

Illustrate the following reactions giving a chemical equation in each case:

a) Carbylamine reaction

b) Coupling reaction

c) Gabriel-Phthalimide synthesis (2011)

Give the structures of A , B and C in the following reactions:

a) CH3CH2I A B C

b) C6H5NO2 A BC

FIVE MARK QUESTIONS

1. Effect the following conversions:

a) Aniline to p-nitro aniline

b) Benzyl bromide to 2-Phenyl ethanamine

c) Acetaldehyde to ethyl amine

d) Nitro Benzene to Benzene

e) Methyl cyanide to acetone

VALUE BASED QUESTION

1. Mrinal wanted to establish a chemical plant for the production of ethanamine. He is

in favour of its production through ammonolysis of alkyl halides. But his friend

suggested him to employ Gabriel phthalimide synthesis process.

a) Is the suggestion given by Mrinal’s friend correct? What are the values shown

by Mrinal’s friend?

b) What do you mean by ammonolysis? Explain ammonolysis of alkyl halides.

c) Why Mrinal’s friend suggested him to employ Gabriel phthalimide synthesis

method?

Please click the link below to download CBSE Class 12 Chemistry Organic Compounds containing Nitrogen