Chemistry : Organic Chemistry – Some Basic Principles and Techniques

In assigning R-S configuration, which among the following groups has highest priority?

• -SO₃H

• -COOH

• -CHO

• -C₆H₅

Which of the following compounds has lowest boiling point?

• n-butyl alcohol

• lso-butyl alcohol

• Tert-butyl alcohol

• Sec-butyl alcohol

Lassaigne's test (with silver nitrate) is commonly used to detect halogens such as chlorine, bromine and iodine but not useful to detect fluorine because the product AgF formed is

• Volatile

• Reactive

• Explosive

• Soluble in water

Cycloheptatrienyl cation is

• Non-benzenoid and non-aromatic

• Non-benzenoid and aromatic

• Benzenoid and non-aromatic

• Benzenoid and aromatic

Which one of the following is a benzenoid aromatic compound?

• Furan

• Thiophene

• Pyridine

• Aniline

The major product obtained by the addition reaction of HBr to 4-methylpent-1-ene in the presence of peroxide is

• 1-bromo-4-methylpentane

• 4-bromo-2-methylpentane

• 2-bromo-4-methylpentane

• 3-bromo-2-methylpentane

The number of possible stereoisomers of the compound CH₃-CH=CH-CH₃ is

• 2

• 4

• 3

• 5

Some organic compounds are given in List I and their uses in List II. Choose the correct matching.

List I	List II
A. Triiodomethane	i. Solvent for alkaloids
B. p, p'-dichlorodiphenyl-trichloroethane	ii. Propellent in aerosols
C. Trichloromethane	iii. Antiseptic
D. Dichloromethane	iv. Insecticide

• A - ii; B - iv; C - i; D - iii

• A - iii; B - iv; C - i; D - ii

• A - ii; B - i; C - iv; D - iii

• A - i; B - iii; C - ii; D - iv

Number of acyclic structural isomers of the compound having the molecular formula C₄H₁₀O is

• 4

• 5

• 6

• 7

The various types of hydrides and examples of each type are given below.

Hydride types	Compounds
A. Electron deficient	i. LiH
B. Saline	ii. CH4
C. Electron	iii. NH3
D. Interstitial	iv. B2H6
E. Electron rich	v. CrH

Choose the correct matching from the codes given below:

• A - ii; B - iv; C - v; D - iii; E - i

• A - iv; B - i; C - ii; D - v; E - iii

• A - iv; B - iii; C - v; D - ii; E - i

• A - v; B - iii; C - iv; D - ii; E - i