Chemistry : Organic Chemistry – Some Basic Principles and Techniques

Which one of the following reactions proceeds through free radical chain mechanism?

• Addition of HBr on ethene

• Halogenation of benzene in the presence of FeBr₃

• Photochemical chlorination of methane

• Hydrolysis of tert-butyl chloride with aqueous KOH

Which one of the following is the correct statement?

• Achiral molecules are superimposable

• Alanine is optically inactive amino acid

• Glycine is optically active amino acid

• There is inversion when (-)-2-methylbutan-1-ol is heated with conc. HCl to form (+)-1-chloro-2-methylbutane

When HBr adds on hex-1-ene in the presence of benzoyl peroxide, the product is

• 2-bromohexane

• 2, 3-dibromohexane

• 1-bromohexane

• 2, 4-dibromohexane

The decreasing order of boiling points of alkyl halides is

• RF > RCl > RBr > RI

• RBr > RCl > RI > RF

• RI > RBr > RCl > RF

• RCl > RF > RI > RBr

The correct order of ease of cleavage of ether linkage by hydrogen halide follows

• HI > HBr > HCl

• HBr > HI > HCl

• HCl > HBr > HI

• HCl > HI > HBr

What are the starting materials to get 2-methylpropene as the major product?

• Sodium methoxide and sec-butyl bromide

• Sodium ethoxide and sec-butyl bromide

• Sodium tert-butoxide and ethyl bromide

• Sodium methoxide and tert-butyl bromide

Which one of the following is the correct order of increasing basic strength of nitrogen compounds in aqueous solution?

• NH₃ < C₂H₅NH₂ < C₆H₅NH₂ < (C₂H₅)₂NH < C₆H₅CH₂NH₂

• C₆H₅NH₂ < NH₃ < C₆H₅CH₂NH₂ < C₂H₅NH₂ <  (C₂H₅)₂NH

• (C₂H₅)₂NH < C₆H₅CH₂NH₂ < NH₃ < C₂H₅NH₂ < C₆H₅NH₂

• C₆H₅CH₂NH₂ < C₂H₅NH₂ < NH₃ < C₆H₅NH₂ < (C₂H₅)₂NH

Hyperconjugation is most useful for stabilising which of the following carbocations?

• Neo-pentyl

• Tert-butyl

• Iso-propyl

• Ethyl

The isomerism that arises due to restricted bond rotation is

• metamerism

• optical isomerism

• position isomerism

• geometrical isomerism

The IUPAC name of the following compound,[(CH₃)₂CH—CH₂—CH=CH—CH=CH(C₂H₅)—CH₃] is

• 2, 8-dimethyl-4, 6-decadiene

• 1, 1, 7, 7-tetramethyl-2, 5-octadiene

• 1, 5-diisopropyl-1, 4-hexadiene

• 3, 9-dimethyl-4, 6-decadiene