JEE Main 2008 — Organic Chemistry

The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is

The organic chloro compound, which shows complete stereochemical inversion during a $\mathrm{S}_{\mathrm{N}} 2$ reaction, is

Phenol, when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid, gives

The absolute configuration of  is

In the following sequence of reactions, the alkene affords the compound ' $B$ ' $\mathrm{CH}_3 \mathrm{CH}=\mathrm{CHCH}_3 \stackrel{\mathrm{O}_3}{\longrightarrow} \mathrm{A} \stackrel{\mathrm{H}_2 \mathrm{O}}{\mathrm{Zn}} \mathrm{B}$. The compound $\mathrm{B}$ is

The treatment of $\mathrm{CH}_3 \mathrm{MgX}$ with $\mathrm{CH}_3 \mathrm{C} \equiv \mathrm{C}-\mathrm{H}$ produces

$\alpha-D-(+)$-glucose and $\beta-D-(+)-g l u c o s e ~ a r e$

Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and then heated with cuprous bromide. The reaction mixture so formed contains

The electrophile, $\mathrm{E}^{\oplus}$ attacks the benzene ring to generate the intermediate $\sigma$-complex. Of the following, which $\sigma$-complex is of lowest energy?