Chemistry : Organic Chemistry – Some Basic Principles and Techniques

Optical isomerism is exhibited by (ox= oxalate anion; en= ethylenediamine).

• cis-[CrCl₂(ox)₂]^3-

• [Co(en)₃]³⁺

• trans-[CrCl₂(ox)₂]^3-

• [Co(ox) (en)₂]⁺

The IUPAC name of the following molecule is

• 5,6-dimethylhept-2-ene

• 2,3-dimethylhept-5-ene

• 5,6-dimethylhept-3-ene

• 5-iso-propylhex-2-ene

The reagents to carry out the following conversion are

• HgSO₄/dil. H₂SO₄

• BH₃; H₂O₂/NaOH

• OSO₄; HIO₄

• NaNH₂/ CH₃I; HgSO₄/ dil.H₂SO₄

The well-known compounds, (+)- lactic acid and (-)- lactic acid, have the same molecular formula, C₃H₆O₃. The correct relationship between them is:

• constitutional isomerism

• geometrical isomerism

• identicalness

• optical isomerism

Which one of the following characteristics belong to an electrophile?

• It is any species having electron deficiency which reacts at an electron-rich C-centre

• It is any species having electron enrichment, that reacts at an electron-deficient C-centre

• It is cationic in nature

• It is anionic in nature

Among the following structures the one which is not a resonating structure of others is

• I

• II

• III

• IV

Among the following carbocations:

Ph₂C⁺CH₂Me (I), PhCH₂CH₂CH⁺Ph (II), Ph₂CHCH⁺Me (III) and Ph₂C(Me)CH₂ (IV), the order of stability is:

• IV > II > I > III

• I > II > III > IV

• II > I > IV > III

• I > IV > III > II

Which one of the following will show optical isomerism?

• OH-CH₂-CO₂H

• CH₃-CH(OH)-CO₂H

• (CH₃)₂-CH-CO₂H

• (CH₃)₂-C(Cl)-CO₂H

Among the following statements about the molecules X and Y, the one(s) which correct is (are)

• X and Y are diastereomers

• X and Y are enantiomers

• X and Y are both aldohexoses

• X is a D-sugar and Y is an L-sugar

Explain why aniline is not as basic as ammonia.