Friedel-Craft's reaction using MeCl and anhydrous AlCl₃ will take place most efficiently with:

• benzene

• nitrobenzene

• acetophenone

• toluene

The 4th higher homologue of ethane is

• butane

• pentane

• hexane

• heptane

The ease of nitration of the following three hydrocarbons follows the order:

• II = III = I

• II > III > I

• III > II > I

• I = III > II

604.

Among the alkenes which one produces tertiary butyl alcohol on acid hydration?

• CH₃-CH₂-CH=CH₂

• CH₃-CH=CH-CH₃

• (CH₃)₂C=CH₂

• CH₃-CH=CH₂

The most likely protonation site in the following molecule is

• C-1

• C-2

• C-3

• C-6

The structure of isobutyl group in an organic compound is

• C₂H₆$-$CH$-$CH₂$-$

• ${\mathrm{CH}}_3-\underset{|}{\mathrm{CH}}-{\mathrm{CH}}_2-{\mathrm{CH}}_3$

• ${\mathrm{CH}}_3-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{CH}}_2-$

• ${\mathrm{CH}}_3-\mathrm{C}\left({\mathrm{C}}_2{\mathrm{H}}_6\right)-$

Nitrobenzene on reaction with conc. HNO₃/H₂SO₄ at 80-100°C forms which one of the following products?

• 1, 2-dinitrobenzene

• 1, 3-dinitrobenzene

• 1, 4-dinitrobenzene

• 1, 2, 4-trinitrobenzene

Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating?

• $-\mathrm{C}\equiv \mathrm{N}$

• $-{\mathrm{SO}}_3\mathrm{H}$

• $-\mathrm{COOH}$

• $-{\mathrm{NO}}_2$

The radical  because it has

• 6p-orbitals and 6 unpaired electrons

• 7p-orbitals and 6 unpaired electrons

• 7p-orbitals and 7 unpaired electrons

• 6p-orbitals and 7 unpaired electrons

Which of the following compounds will not undergo Friedal-Craft's reaction easily?

• Cumene

• Xylene

• Nitrobenzene

• Toluene