Question

4. Which acid below is the strongest ?
a) Butanoic acid
c) 3- chlorobufanoic acid
b) 2-chlorobutanoic acid
d) 4 - chlorobutanoic acid​

Answer 1

Answer:

4 chlorobutanoic acid

Answer 2

Correct option is - b) 2-chlorobutanoic acid

• Presence of chlorine changes the acidic strength of acid.
• It is an electron withdrawing group and hence causes polarity.
• The decrease in electron density is responsible for ease of loss of proton.
• Hence, closer the chlorine group, more will be the polarity.
• Therefore, 2-chlorobutanoic acid will be the strongest acid.