Question

44. In Sulfonic acid -SO3H group is
replaced by -NO2 group is called
a) Ortho substitution
d) Ipso substitution
b) Meta substitution
c) Para substitution​

Answer 1

☆ Answer

b ) Meta substitution

Answer 2

CORRECT OPTION IS (b).

(b) META SUBSTITUTION

Explanation:

• The sulphonic acid group and nitro groups are electron withdrawing in nature.
• They tend to take up electrons from the benzene ring and deactivates it. They are usually attached to meta position of benzene ring relative to other groups attached.
• In meta substitution, substituents are present on 1, 3 positions.
• When nitro group substitutes the sulphonic group, it is called meta substitution as it is being removed from the meta position.
• Therefore, option (b) meta substitution is correct.