CBSE 2023 · Region 5 · Set 1 · Q21 · 2 marks
(a)Which of the following species cannot act as a ligand? Give reason. \[\mathrm{OH}^{-}, \mathrm{NH}_{4}^{+}, \mathrm{CH}_{3} \mathrm{NH}_{2}, \mathrm{H}_{2} \mathrm{O} \](b)The complex $\displaystyle \left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5}\left(\mathrm{NO}_{2}\right)\right] \mathrm{Cl}_{2}$ is red in colour. Give IUPAC name of its linkage isomer.
(a)
Which of the following species cannot act as a ligand? Give reason. \[\mathrm{OH}^{-}, \mathrm{NH}_{4}^{+}, \mathrm{CH}_{3} \mathrm{NH}_{2}, \mathrm{H}_{2} \mathrm{O} \]
(b)
The complex $\displaystyle \left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5}\left(\mathrm{NO}_{2}\right)\right] \mathrm{Cl}_{2}$ is red in colour. Give IUPAC name of its linkage isomer.
Marking-scheme solution
(a) \(\displaystyle \mathrm{NH}_{4}{ }^{+}\),
Due to the unavailability of lone pair of electrons / cannot act as a Lewis base.
(b) Pentaamminenitrito-O-cobalt (III)chloride
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CBSE Class 12 Chemistry past-paper question from the 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.