Electrochemistry Result Question 1
1. The decreasing order of electrical conductivity of the following aqueous solution is
$0.1 \mathrm{M}$ formic acid $(A)$,
$0.1 \mathrm{M}$ acetic acid $(B)$,
$0.1 \mathrm{M}$ benzoic acid $(C)$.
(a) $A>C>B$
(b) $C>B>A$
(c) $A>B>C$
(d) $C>A>B$
(2019 Main, 12 April II)
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Answer:
Correct Answer: 1. ( a )
Solution:
- Electrical conductivity of the given aqueous solutions depends on the degree of ionisation. Degree of ionisation is directly proportional to the acidic strength. Electron withdrawing groups (EWGs) increases the stability of the carboxylate ion by dispersing the negative charge through resonance effect on the conjugate while electron donating groups (EDGs) decreases the stability of the carboxylate ion by intensifying the negative charge.
BETA
