(b) Classify the following substituents as ortho, meta and para directing groups.
-NO2, -OCH3, -OCOCH3 ,-C=N
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Al+ ZnSo4 -------→ Al2(So4)3 +Zn Observation Aluminum being more reactive than zinc displaces zinc from znso4 and form al2( so4)3 and Zn Al + Feso4 ---------→ Al2(So4)3 +Fe Aluminum being more reactive than iron displaces iron from FeSo4 and form al2( so4)3 and Fe
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