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Organic Chemistry Questions and Answers – Physical Properties of Amines | Organic Chemistry Multiple Choice Questions and Answers

Free download in PDF Organic Chemistry Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like UPSC, NDA, SSC etc. These short solved questions or quizzes are provided by Gkseries./p>

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(1) Which of the following compound is expected to be most basic?
[A] Aniline
[B] Methylamine
[C] Hydroxylamine
[D] Ethylamine
Answer: Ethylamine
(2) A solution of methyl amine shows which type of property with litmus paper?
[A] Turns blue litmus red
[B] Turns red litmus blue
[C] Does not affect red or blue litmus
[D] Bleaches litmus
Answer: Turns red litmus blue
(3) Which of the following statement is true about methyl amine?
[A] Methyl amine is slightly acidic
[B] Methyl amine is less basic than NH3
[C] Methyl amine is stronger base than NH3
[D] Methyl amine forms salts with alkali
Answer: Methyl amine is stronger base than NH3
(4) By the presence of a halogen atom in the ring, what is the effect of this on basic properties of aniline?
[A] Increased
[B] Decreased
[C] Unchanged
[D] Doubled
Answer: Increased
(5) What is the characteristic smell of liquid amines?
[A] Fish like smell
[B] Rotten egg smell
[C] Fruity smell
[D] Bitter almond smell
Answer: Fish like smell
(6) Which of the following have less melting point than amine?
[A] Alcohol
[B] Phosphine
[C] Carboxylic acid
[D] Ether
Answer: Phosphine
(7) Which of the following amine has highest boiling point?
[A] Butyl amine
[B] Diethylamine
[C] Triethylamine
[D] Dipropylamine
Answer: Dipropylamine
(8) What is the correct decreasing order of the basic character of the three amines and ammonia?
[A] NH3 > CH3NH2 > C2H5NH2 > C6H5NH2
[B] C2H5NH2 > CH3NH2 > NH3 > C6H5NH2
[C] C6H5NH2 > C2H5NH2 > CH3NH2 > NH3
[D] CH3NH2 > C2H5NH2 > C6H5NH2 > NH3
Answer: C2H5NH2 > CH3NH2 > NH3 > C6H5NH2
(9) Unpleasant smelling carbylamines are formed by heating alkali and chloroform with which of the following?
[A] Any amine
[B] Any aliphatic amine
[C] Any aromatic amine
[D] Any primary amine
Answer: Any primary amine
(10) Which statement is an incorrect statement?
[A] Amines form hydrogen bond
[B] Ethyl amine has higher boiling point than propane
[C] Methyl amine is more basic than ammonia
[D] Dimethyl amine is less basic than methyl amine
Answer: Dimethyl amine is less basic than methyl amine
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