Question
Of the following elements, which one has highest electro-negativity
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${\left[ Co \left( NH _{3}\right)\right]^{3+}}$
${\left[ CoCl \left( NH _{3}\right)_{5}\right]^{2+}}$
${\left[ Co ( CN )_{6}\right]^{3-}}$
${\left[ Co \left( NH _{3}\right)_{5}\left( H _{2} O \right)\right]^{3+}}$
The spin-only magnetic moment value of the complex that absorbs light with shortest wavelength is $B.M.$ (Nearest integer)
$H _2 O (\ell) \rightarrow H _2 O ( g )$
at $T =100^{\circ} C$ and $1$ atmosphere pressure, the correct choice is :