Chemistry : Organic Chemistry – Some Basic Principles and Techniques

Ease of nucleophilic addition in the given compounds is

• I > III > II

• II > III > I

• II > I > III

• III > I > II

Which of the following species is not aromatic?

• Benzene

• Cyclooctatetraenyl dianion

• Tropylium ion

• Cyclopentadienyl cation

Select the correct statement.

• Geometrical isomer may differ in dipole moment and visible/UV spectra.

• Complexes of the type [Ma₃b₃] can also have facial (fac) and meridional (mer) isomer.

• No optical isomer exists for the complex trans- [Co(en)₂Cl₂]⁺.

• All of these.

Arrange the following compounds in increasing order of rate of reaction towards nucleophilic substitution :

• I < II < III

• I < III < II

• III < II < I

• II < III < I

The major organic product formed in the following reaction.

Among the following, the achiral amino acid is

• 2-ethylalanine

• 2-methylglycine

• 2-hydroxymethylserine

• tryptophan

Assertion : When acetamide reacts with NaOH and Br,, methyl amine is formed.

Reason : The reaction occurs through intermediate formation of isocyanate.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false

• If both assertion and reason are false

Assertion : Chlorobenzene is more reactive than benzene towards the electrophilic substitution reaction.

Reason : Resonance destabilises the carbocation.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false

• If both assertion and reason are false

Assertion : The Dumas method is more applicable to nitrogen containing organic compounds than the Kjeldahl's method.

Reason: The Kjeldahl's method does not give satisfactory results for compounds in which nitrogen is directly linked to oxygen.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false

• If both assertion and reason are false

Isopropylbenzene on air oxidation in the presence of dilute acid gives

• C₆H₅COOH

• C₆H₅COCH₃

• C₆H₅CHO

• C₆H₅OH