WBJEE · Chemistry · Coordination Compounds
A solution is made by a concentrated solution of \(\mathrm{Co}\left(\mathrm{NO}_{3}\right)_{2}\) with a concentrated solution of \(\mathrm{NaNO}_{2}\) in \(50 \%\) acetic acid. A solution of a salt containing metal \(\mathrm{M}\) is added to the mixture, when a yellow precipitate is formed. Metal ' \(\mathrm{M}\) ' is
- A Magnesium
- B Sodium
- C Potassium
- D Zinc
Answer & Solution
Correct Answer
(C) Potassium
Step-by-step Solution
Detailed explanation
\begin{array}{l} \mathrm{Co}\left(\mathrm{NO}_{3}\right)_{3}+\mathrm{NaNO}_{2} \longrightarrow \mathrm{Na}_{3}\left[\mathrm{Co}\left(\mathrm{NO}_{2}\right)_{6}\right] \\ \mathrm{Na}_{3}\left[\mathrm{Co}\left(\mathrm{NO}_{3}\right)_{6}\right]+\mathrm{K}^{+} \longrightarrow…
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