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

108.

Methoxy methane and ethanol are :

• positionl isomers

• chain isomers

• functional isomers

• optical isomers

Lassaigne's test for the detection of nitrogen fails in

• H₂N-CO-NHNH₂.HCl

• NH₂-NH₂.HCl

• C₆H₅-NH-NH₂.HCl

• C₆H₅CONH₂

The purity of an organic compound is determined by

• Chromatography

• Crystallisation

• melting or boiling point

• both( A )and (C)