Exercise 4

The product ${}^{\text{'}}\mathrm{Y}^{\text{'}}$ in the following reaction sequence is:

Structural formula of Lewisite is:

The number of $\sigma$ and $\pi$ bonds present in Pent$-1-$en$-4-$yne is: 

The total number of $\text{π-}$bond electrons in the following structure is:

The enolic form of ethyl acetoacetate as below has:

Which of the compounds with molecular formula ${\mathrm{C}}_5{\mathrm{H}}_{10}$, yields acetone on ozonolysis ?

In the following sequence of reactions, the alkene affords the compound B

${\mathrm{CH}}_3\mathrm{CH}={\mathrm{CHCH}}_3\stackrel{{\mathrm{O}}_3}{\to } \mathrm{A} \stackrel{\mathrm{Zn}-{\mathrm{H}}_2\mathrm{O}}{\to } \mathrm{B}$ The compound B is 

Which of the following, upon treatment with tert-$BuONa$ followed by addition of bromine water, fails to decolourize the colour of bromine?