Haloalkanes and Haloarenes  MCQs

MCQs of Haloalkanes and Haloarenes

Showing 51 to 60 out of 112 Questions
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51.
The best method to prepare vicinal dibromoethane is to react _____
(a) Ethene with Br2
(b) Ethene with HBr
(c) Ethyne with Br2
(d) Ethyne with 2 moles of HBr
Answer:

Option (a)

52.
Which of the following compound is obtained by Sandmeyer reaction ?
(a) Benzyl chloride
(b) Aniline
(c) Chlorobenzene
(d) Phenol
Answer:

Option (c)

53.
What is the correct order of bond enthalpy of methy halides ?
(a) CH3-F < CH3-Cl < CH3-Br < CH3-I
(b) CH3-F > CH3-Cl > CH3-Br > CH3-I
(c) CH3-F > CH3-Cl < CH3-Br = CH3-I
(d) CH3-F > CH3-Cl = CH3-Br > CH3-I
Answer:

Option (b)

54.
Which carbon-halogen bond has the lowest bond enthalpy ?
(a) C - I
(b) C - Cl
(c) C - F
(d) C - Br
Answer:

Option (a)

55.
Which of the following has less bond enthalpy ?
(a) CH3 - I
(b) CH3 - F
(c) CH3 - Cl
(d) CH3 - Br
Answer:

Option (a)

56.
Which compound rotates the plane of polarized light to the left ?
(a) Laevo
(b) Dextro
(c) Racemic
(d) Diasteromer
Answer:

Option (a)

57.
How many isomers are possible for Tartaric acid ?
(a) d and l
(b) (±)
(c) Meso
(d) All of the above
Answer:

Option (d)

58.
if a molecule contain 'n' even number of chiral carbon atoms and it has a plane of symmetry, then how many optical isomers does it possess?
(a) 2n
(b) 2n-22
(c) 2(n-1)
(d) 22n-1
Answer:

Option (c)

59.
If a molecule has n number of different chiral centres, then, how many possible stereoisomers will it have ?
(a) 2n
(b) n2
(c) 2n+1
(d) 2n-1
Answer:

Option (a)

60.
Which is the decreasing order of priority for R-S nomenclature ?
(a) -I, -NO2, -CHO, -CH2CH3
(b) -CHO, -COOH, -OH, -CH3
(c) -CHO, -COOH, -OCH3, -I
(d) -NH2, -OH, -NO2, -CH3
Answer:

Option (a)

Showing 51 to 60 out of 112 Questions
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