Question

Which of the following is correctly matched?

• A. Column-I - $\left[Cr(CO{)}_6\right]$ ,Column-II - Paramagnetic , Column-III - Octahedral, $s{p}^3{d}^2$
• B. Column-I - $\left[Fe(CO{)}_5\right]$ ,Column-II - Paramagnetic , Column-III - Trigonal bipyramidal, $s{p}^{3}d$
• C. Column-I - $\left[Co(CO{)}_4\right]$ ,Column-II - Paramagnetic , Column-III - Square planar, $ds{p}^2$
• D. Column-I - $\left[Ni(CO{)}_4\right]$ ,Column-II - Diamagnetic , Column-III - Square planar, $ds{p}^2$

Answer 1

Answer: (C)

$\left[Co(CO{)}_4\right]\to$ Paramagnetic, $ds{p}^2$ (square planer)