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🛠️ JEE🧪 Chemistry

The standard electrode potential \(\left({\mathrm{M}}^{3+}/{\mathrm{M}}^{2+}\right)\) for V, Cr, Mn&Co are \(-0.26\m…

Q1

The standard electrode potential \(\left({\mathrm{M}}^{3+}/{\mathrm{M}}^{2+}\right)\) for V, Cr, Mn&Co are \(-0.26\mathrm{V},-0.41\mathrm{V},+1.57\mathrm{V}\) and \(+1.97\mathrm{V}\), respectively. The metal ions which can liberate \({\mathrm{H}}_{2}\) from a dilute acid are

a

\({\mathrm{V}}^{2+}\) and \({\mathrm{Mn}}^{2+}\)

b

\({\mathrm{Cr}}^{2+}\) and \(C{o}^{2+}\)

c

\({\mathrm{V}}^{2+}\) and \({\mathrm{Cr}}^{2+}\)

d

\({\mathrm{Mn}}^{2+}\) and \({\mathrm{Co}}^{2+}\)

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