MCQ
$1, 2-$Dichloroethene shows
- ✓Geometrical isomerism
- BOptical isomerism
- CRing-chain isomerism
- DResonance

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$(ii)$ $O_3^+, O_3$
$(iii)$ $NO_2^-$ or $O_3$
$(iv)$ $X—S—X$ angle in $SOCl_2$ and $SOF_2$