JEE Advanced 2020 Full Test 5 Paper 2

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Question : 32 of 54

Marks: +1, -0

The correct statements about some of the ions of 3 d-series in aqueous solution

Cr2+ is better reducing agent than Fe3+
Co3+ is better oxidising agent than Fe3+
When Fe3+ is used as oxidising agent, it attains 3d7 electronic configuration
Cu is the only metal in 3d series, which is not having ability to displace hydrogen as H2 from acidic solution (consider thermodynamic aspects).

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