KEAM 2011 Physics and Chemistry Paper

(i) Geometrical isomers of compound CHCl = CHCHOHCOOH (ii) It also shows optical isomerism as (iii) It can also show position isomerism. For example two positional isomers are given below : $\underset{4}{\overset{|^{\mathrm{Cl}}\mathrm{C}}{\mathrm{H}}} = \underset{3}{\mathrm{C}}\mathrm{H} - \underset{2}{\overset{|^{\mathrm{OH}}\mathrm{C}}{\mathrm{H}}} - \underset{1}{\mathrm{C}}\mathrm{OOH}$ 4 -chloro-2-hydroxy-3-butene-1-oic acid $\overset{^{\mathrm{Cl}}\big|\mathrm{C}}{\mathrm{H}} = \overset{^{\mathrm{OH}}\big|\mathrm{C}}{-} \mathrm{CH}_2 - \mathrm{COOH}$ 4 -chloro-3-hydroxy-3-butene -1 -oic acid (iv) It can also show functional isomerism as functional isomer of an alcohol is ether. $\overset{|^{\mathrm{Cl}}\mathrm{C}}{\mathrm{H}} = \mathrm{CH} \underset{\text{alcohol}}{- \overset{|^{\mathrm{OH}}\mathrm{C}}{\mathrm{H}}} - \mathrm{COOH}$ $\overset{|^{\mathrm{Cl}}\mathrm{C}}{\mathrm{H}} = \mathrm{CH} \underset{\text{ether}}{-\mathrm{O}-\mathrm{CH}_2} - \mathrm{COOH}$