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Nitration of Benzaldehyde shall yield which of the following?

a. Ortho-Nitrobenzaldehyde
b. Para-Nitrobenzaldehyde
c. Meta-Nitrobenzaldehyde
d. None of the above

Answer:Meta-Nitrobenzaldehyde. The substituent groups that offer meta isomers of the parent compound are know as meta-director. Below is the list of substituents yields meta isomer of the parent compound.

List of Meta-directors:

1. -NO2
2. -SO3H
3. -CHO
4. -CN
5. -N (CH3)3 +
6. -COOH

meta-nitrobenzaldehyde

In the above example, nitration of benzaldehyde will yield meta-nitrobenzaldehyde because the -CHO group present in the ring is a meta director.