Chemistry : Organic Chemistry – Some Basic Principles and Techniques

An aromatic compound 'A' (C₇H₉N) on reacting with NaNO₂/HCl at 0°C forms benzyl alcohol and nitrogen gas. The number of isomers possible for the compound 'A' is

• 5

• 7

• 3

• 6

Carbocation as an intermediate is likely to be formed in the reaction

• Propene + Cl₂ $\stackrel{hv}{\to }$ 2-chloropropane

• Acetone + HCN $\stackrel{-OH}{\to }$ acetonecyano hydrin

• Ethylbromide + aq.KOH $\stackrel{∆}{\to }$ ethyl alcohol

• Hexane $\stackrel{\mathrm{anhy}. {\mathrm{AlCl}}_3/ \mathrm{HCl}}{\to }$ 2-methyl pentane

The IUPAC name of 'B' is

• 3-methylbutan-2-ol

• 2-methylbutan-3-ol

• 2-methylbutan-2-ol

• pentan-2-ol

The compound that reacts the fastest with sodium methoxide is

Which of the following compound possesses the C-H bond with the lowest bond dissociation energy?

• Toluene

• Benzene

• n-pentane

• 2, 2-dimethyl propane

In the presence of HCl, H₂S results the precipitation of group-2 elements but no group-4 elements during qualitative analysis. It is due to

• higher concentration of S^2-

• higher concentration of H⁺

• Lower concentration of S^2-

• Lower concentration of H⁺

IUPAC name of the compound,

• 1-bromobut-2-ene

• 2-bromo-2-butene

• bromobutene

• 1-bromobut-3-ene

Which of the following gives positive Fehling's solution test?

• Sucrose

• Glucose

• Fats

• Protein

Electrophile that participates in nitration of benzene is

• NO⁺

• NO${}_2^{+}$

• NO

• NO${}_3^{-}$

Which of the following is most likely to show optical isomerism ?

• HC≡C-$\underset{\mathrm{Cl}}{\overset{\mathrm{H}}{\underset{\left|}{\overset{\right|}{\mathrm{C}}}}}$-C≡CH

• HC≡C-$\underset{\mathrm{Cl}}{\overset{\mathrm{H}}{\underset{\left|}{\overset{\right|}{\mathrm{C}}}}}$-CH₃

• HC≡C-$\underset{\mathrm{Cl}}{\overset{\mathrm{H}}{\underset{\left|}{\overset{\right|}{\mathrm{C}}}}}$-H

• HC≡C-C (Cl) = CH₂