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Which of the following pair of ions are same coloured? (Memory Based JEE Mains 23/01/2025 ,Shift -1)

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Which of the following pair of ions are same coloured?

(Memory Based JEE Mains 23/01/2025 ,Shift -1)

a

\({\mathrm{Ti}}^{4+},{\mathrm{V}}^{3+}\)

b

\({\mathrm{Cr}}^{2+},{\mathrm{Cu}}^{2+}\)

c

\({\mathrm{Cr}}^{3+},{\mathrm{Ni}}^{2+}\)

d

\({\mathrm{Mn}}^{3+},{\mathrm{Ni}}^{2+}\)

✓ Correct answer: b)

\({\mathrm{Cr}}^{2+},{\mathrm{Cu}}^{2+}\)

Explanation

Both \({\mathrm{Cr}}^{2+}\mathrm{and}{\mathrm{Cu}}^{2+}\)are blue in colour

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