The correct option(s) to distinguish nitrate salts of Mn 2+…

Maths JEE - Advanced Previous Year Paper JEE-Advanced-2018-Paper-2 Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 13, 2026

The correct option(s) to distinguish nitrate salts of Mn 2+ and Cu 2+ taken separately is (are)

Mn 2+ shows the characteristic green colour in the flame test

Only Cu 2+ shows the formation of precipitate by passing H 2 S in acidic medium

Only Mn 2+ shows the formation of precipitate by passing H 2 S in faintly basic medium

Cu 2+ /Cu has higher reduction potential than Mn 2+ /Mn (measured under similar conditions)

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The correct answer is:

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(b, d)

Cu 2+ shows the characteristic green colour in the flame test.

Ksp of CuS < Ksp of MnS

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