The compound having only primary hydrogen atoms is
isobutene
2,3-dimethylbutene
cyclohexane
propyne
Assertion : Styrene on reaction with HBr gives 2-bromo-2-phenyl ethane.
Reason: Benzyl radical is more stable than alkyl radical.
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 resason is true but assertion is false
If both assertion and reason are false.
Assertion : The pKa of acetic acid is lower than that of phenol.
Reason : Phenoxide ion is more resonance stabilised
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 : Alkyl benzene is not prepared by Friedel-Crafts alkylation of benzene.
Reason : Alkyl halides are less reactive than acyl halides.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
If both assertion and reason are true and the reason is not the correct explanation of the assertion.
If assertion is true but reason is false.
If both assertion and reason are false.