MCQ
Which of the following does not have optical isomer
- ✓$[Co{(N{H_3})_3}C{l_3}]$
- B$[Co{(en)_3}]C{l_3}$
- C$[Co{(en)_2}C{l_2}]Cl$
- D$[Co(en){(N{H_3})_2}C{l_2}]Cl$
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$A.$ Geometry
$B.$ Geometrical isomerism
$C.$ Optical isomerism
$D.$ Magnetic properties
Statement - $I$: High concentration of strong nucleophilic reagent with secondary alkyl halides which do not have bulky substituents will follow $\mathrm{S}_{\mathrm{N}} 2$ mechanism.
Statement - $II$: A secondary alkyl halide when treated with a large excess of ethanol follows $\mathrm{S}_{\mathrm{N}} 1$ mechanism.
In the the light of the above statements, choose the most appropriate from the questions given below:

if $E_{C{u^{ + 2}}/Cu}^o\, = \, + 0.34\,V$
$E_{A{g^ + }/Ag}^o\, = \, + 0.80\,V$
$E_{cell}$ will be