MCQ
Racemic mixture is obtained due to halogenation of :
- A$n-$ pentane
- BIsopentane
- Cneopentane
- ✓Both $A\,\& \,B$
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$ArN _{2} Cl \overset{Cu / HCl}{\rightarrow} ArCl + N _{2}$ is known as

$[Image]$
is fastest, then $Z$ is
$(A)$ It has two geometrical isomers
$(B)$ It will have three geometrical isomers if bidentate 'en' is replaced by two cyanide ligands
$(C)$ It is paramagnetic
$(D)$ It absorbs light at longer wavelength as compared to $\left[ Co ( en )\left( NH _3\right)_4\right]^{3+}$