Organic Compounds Containing Nitrogen  MCQs

MCQs of Organic Compounds Containing Nitrogen

Showing 41 to 50 out of 139 Questions
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41.
Which of the following has the lowest value of pKb ?
(a) NH3
(b) CH3 – NH2
(c) (CH3)2NH
(d) (CH3)3N
Answer:

Option (c)

42.
Which compound gives primary amine on heating with Br2 and ethanolic solution of NaOH ?
(a) RCOCl
(b) RCONHCH3
(c) RCONH2
(d) RCOOR
Answer:

Option (c)

43.
What is the colour of pure aniline exposed to air for long time ?
(a) Red
(b) Green
(c) Yellow
(d) Colourless
Answer:

Option (a)

44.
What is the odour of aniline ?
(a) Sweet fruity
(b) Like lifebuoy soap
(c) Pungent and coughing
(d) Fishy
Answer:

Option (d)

45.
State correct order of boiling points.
(a) Ethanamine > ethane > ethanol
(b) Ethanol > ethanamine > ethane
(c) Ethanamine > ethanol > ethane
(d) Ethanol > ethane > ethanamine
Answer:

Option (b)

46.
Find the incorrect order of boiling point.
(a) CH3CH2CH2NH2 > CH3CH2NH2 > CH3NH2
(b) (CH3)3N > CH3–NH–C2H5 > CH3CH2CH2NH2
(c) CH3CH2CH2NH2 > CH3NHC2H5 > (CH3)3N
(d) C2H5OH > C2H5NH2 > C2H6
Answer:

Option (b)

47.
What is the correct order of boiling point for amines (X) CH3NHC2H5 (Y) CH3CH2CH2NH2 and (Z) (CH3)3N ?
(a) Y > X > Z
(b) Y < X < Z
(c) X > Y > Z
(d) Y > Z > X
Answer:

Option (a)

48.
Which of the following compounds is the strongest base in its gaseous state ?
(a) (CH3)3N
(b) CH3NH2
(c) (CH3)2NH
(d) NH3
Answer:

Option (a)

49.
What is the order of basicity for amines in gaseous phase ?
(a) 3° amine > 2° amine > 1° amine > NH3
(b) NH3 > 1° amine > 2° amine > 3° amine
(c) NH3 < 1° amine > 2° amine > 3° amine
(d) 1° amine > 2° amine > NH3 > 3° amine
Answer:

Option (a)

50.
Which of the following factors does not play role in determining basicity of alkanamines in aqueous medium ?
(a) +I effect
(b) Solvation effect
(c) Mesomeric effect
(d) Steric hindrance of alkyl group
Answer:

Option (c)

Showing 41 to 50 out of 139 Questions
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