Which one of the following can exhibit $$cis-trans-isomerism?$$
A.
$$C{H_3} - CHCl - COOH$$
B.
$$H - C \equiv C - Cl$$
C.
$$Cl - CH = CHCl$$
D.
$$ClC{H_2} - C{H_2}Cl$$
Answer :
$$Cl - CH = CHCl$$
Solution :
The main conditions for geometrical isomerism are
(i) The molecule must have a double bond and the double bond should have restricted rotation
(ii) The two atoms or groups attached to the same carbon atom must be different.
These two conditions are only obeyed by $$Cl - CH = CH - Cl,$$ so it shows geometrical isomerism.
Releted MCQ Question on Organic Chemistry >> General Organic Chemistry
Releted Question 1
The bond order of individual carbon-carbon bonds in
benzene is