Assertion : Addition of HBr on 2-butene gives two isomeric products.

Reason: Addition of HBr on 2-butene follows Markovnikov's rule.

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

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

• If assertion is true, but reason is false.

• Both assertion and reason are false statements.

Assertion : p-O₂N- C₆H₅COCH₃ is prepared by Friedel Crafts acylation of nitrobenzcne.

Reason : Nitrobenzene easily undergoes electrophilic substitution reaction.

• 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.

583.

Assertion : Alkyl isocyanides in acidified water give alkyl formamides.

Reason : In isocyanides, carbon first acts as a nucleophile and then as an electrophile.

• 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 : Cyclopentadienyl anion is much more stable than allyl anion.

Reason : Cyclopentadienyl anion is aromatic in character.

• 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.

Action of acetylene on dilute H₂SO₄ gives :

• acetic acid

• acetaldehyde

• acetone

• acetoacetic ester

The treatment of benzene with isobutene in the presence of sulphuric acid gives

• iso -butyl benzene

• tert -butyl benzene

• n -butyl benzene

• no reaction

The strongest base among the following is

The length of C - C bond in benzene is :

• 1.22 A^o

• 1.54 A^o

• 1.39 A^o

• 1.56 A^o

Which of the following is most stable ?

• 1-butene

• 1-pentene

• 2-butene

• 2-pentene

The compound having only primary hydrogen atoms is

• isobutene

• 2,3-dimethylbutene

• cyclohexane

• propyne