Prof. Santosh Yadav and Prof. Anil Thomas Solutions for Chapter: Coordination Compounds, Exercise 3: Competitive Thinking

On treatment of $100 \mathrm{mL} \text{of} 0.1 \mathrm{M}$ solution of ${\mathrm{CoCl}}_3·6{\mathrm{H}}_2\mathrm{O}$ with excess ${\mathrm{AgNO}}_3$, $1.2\times {10}^{22}$ ions are precipitated. The complex is

The most stable complex among the following is

Which of the following has longest $\mathrm{C}-\mathrm{O}$ bond length?(Free $\mathrm{C}-\mathrm{O}$ bond length in $\mathrm{CO} \text{is} 1.128$ Å)

The complex salt can be made by the combination of ${\left[{\mathrm{Co}}^{\left(\mathrm{III}\right)}{\left({\mathrm{NH}}_3\right)}_5\mathrm{Cl}\right]}^{\mathrm{x}}$ with:

The bonds in ${\mathrm{K}}_4\left[\mathrm{Fe}{\left(\mathrm{CN}\right)}_6\right]$ are

What is(are) the number of unpaired electrons in the square planar ${\left[\mathrm{Pt}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$ ion?

Which of the following processes does not involve the oxidation of iron?

The $\mathrm{IUPAC}$ name of the complex ion formed when gold dissolves in aqua regia is