Organic Chemistry (part-1).

Q: Sublimation is a process in which a solid

O: (a) Changes into vapour form. (b) Changes into another allotropic form.

(c) Changes into liquid form. (d) None of the above.

A: (a) Changes is a vapour form.

Q: Which is purified by steam distillation?

O: (a) Aniline. (b) Benzoic acid.

(c) Petroleum. (d) Naphthalene.

A: (a) Aniline.

Q: Which of the following compound shows aromatic properties?

O: (a) Valine. (b) Leucine.

(c) Serine. (d) Tyrosine.

A: (d) Tyrosine.

Q: Lassaigne’s test is not used for the detection of

O: (a) Carbon. (b) Halogens.

(c) Nitrogen. (d) Sulphur.

A: (a) Carbon.

Q: Monobromination of 2-methyylbutane give how many distinct isomers?

O: (a) One. (b) Two.

(b) Three. (d) Four.

A: (d) Four.

Q: Which one of the following is a non-benzenoid aromatic compound?

O: (a) Aniline. (b) Naphthalene.

(c) Benzoic acid. (d) Tropolone.

(e) Anthracene.

A: (d) Tropolone.

Q: Which one of the following is aromatic?

O: (a) Cyclopentadienyl cation. (b) Cyclo-octateraene.

(c) Cycloheptariene. (d) Cycloheptarienyl cation.

A: (d) Cycloheptarienyl cation.

Q: How many chiral carbon atoms are present in 2,3,4-trichloropentane?

O: (a) 4 (b) 1

(c) 2 (d) 3

A: (c) 2

Q: A compound has tow different asymmetric carbon then the number of stereomers

O: (a) 4 (b) 2

(c) 3 (d) 1

A: (a) 4

Q: A compound has 3 chiral carbon atoms. The number of possible optical isomers it cam have

O: (a) 3 (b) 3

(c) 8 (d) 4

A: (c) 8

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