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JEE Advanced 2025
Paper 1 2025
Question
The correct order of the wavelength maxima of the absorption band in the ultraviolet-visible region for the given complexes is
Select the correct option:
A
$\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-}<\left[\mathrm{Co}\left(\mathrm{NH}_3\right) 6\right]^{3+}<\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5\left(\mathrm{H}_2 \mathrm{O}\right)\right]^{3+}<\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5(\mathrm{Cl})\right]^{2+}$
B
$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5(\mathrm{Cl})\right]^{2+}<\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5\left(\mathrm{H}_2 \mathrm{O}\right)\right]^{3+}<\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}<\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-}$
C
$\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-}<\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5(\mathrm{Cl})\right]^{2+}<\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5\left(\mathrm{H}_2 \mathrm{O}\right)\right]^{3+}<\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$
D
$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}<\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-}<\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5(\mathrm{Cl})\right]^{2+}<\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5\left(\mathrm{H}_2 \mathrm{O}\right)\right]^{3+}$
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
Solution Image
Question Tags
JEE Advance
Chemistry
Easy
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