Q20 · CSIR-NET Chemistry, June 2019

Paper: CSIR-NET June 2019 · Subject: Inorganic Chemistry · Chapter: Analytical Chemistry · Topic: Titrations Gravimetry · Marks: 2 · Difficulty: Easy

Incorrect statement for amperometric titration is
(a)it is based on measurement of diffusion current.
(b)its sensitivity is always higher than those of spectrophotometric titrations
(c)it does not generally require an indicator
(d)it requires inert atmosphere ( $\mathrm{N}_{2} / \mathrm{Ar}$ )
Answer
Answer: B ✓ checked by 4AB · confidence medium

The source book printed D; on checking, B is correct — see the explanation.

Explanation
Amperometric titrations measure the diffusion current, need no indicator and usually need de-aeration (N₂/Ar); but they are not always more sensitive than spectrophotometric titrations, so (b) is the incorrect statement.

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