How many forms of benzaldoxime exist?

Draw $cis$ and $trans$ isomers of the following compounds. Also write their $IUPAC$ names:
$(i)$ $CHCl=CHCl$
$(ii)$ $C_{2}H_{5}C(CH_{3})=C(CH_{3})C_{2}H_{5}$

Which of the following compounds does not exhibit geometrical isomerism?

$I$ and $II$ are geometrical isomers of each other because

In the following structure,the double bonds are marked as $I$,$II$,$III$ and $IV$. Geometrical isomerism is not possible at site$(s)$:

Which of the following compounds will exhibit geometrical isomerism?