The presence of nitro group `(− NO_(2))` at ortho or para positions increases the reactivity of haloarenes towards nucleophilic substitution reactions. Explain.

Give reasons: (a) n-Butyl bromide has higher boiling point than t-butyl bromide. (b) Racemic mixture is optically inactive. (c) The presence of nitro group ( -NO_(2) ) at o & p positions increases the reactivity of haloarenes towards nucleophilic substitution reactions.

Give reasons: (a) n-Butyl bromide has higher boiling point than t-butyl bromide. (b) Racemic mixture is optically inactive. (c) The presence of nitro group ( -NO_(2) ) at op positions increases the reactivity of haloarenes towards nucleophilic substitution reactions.

Assertion: Presence of a nitro group at ortho or para position increases the reactivity of haloarenes towards nucleophilic substitution. Reason: Nitro group, being an electron withdrawing group decreases the electron density over the benzene ring.

Assertion (A) Presence of a nitro group at ortho or para position increases the reactivity of haloarenas towards nucleophilic substitution. Reason (R ) Nitro group, being an electron withdrawing group decreases the electron density over the benzene ring.

Nucleophilic substitution reaction in Haloarenes

The correct order of reactivity towards nucleophilic substitution reaction is