The metal used for the de-brommation reaction of 1, 2-dibromoethane

• Na

• Zn

• Mg

• Li

Which of the following reagents when heated with ethyl chloride, forms ethylene ?

• Aqueous KOH

• Zn/ HCl

• Alcoholic KOH

• HI

Which of the following compounds is soluble in benzene but almost insoluble in water?

• C₂H₅OH

• CH₃CO₂H

• CH₃CHO

• C₆H₅NO₂

The compound prepared by a substitution reaction of benzene is

• acetophenone

• glyoxal

• cyclohexane

• hexabromo cyclohexane

105.

The number of sigma (σ) and pi ($\mathrm{\pi }$) bonds present in benzene respectively are :

• 12, 6

• 6, 6

• 6, 12

• 12, 3

Identify 'B in the following reaction ${\mathrm{CH}}_2={\mathrm{CH}}_2 + \mathrm{HCl} \stackrel{\mathrm{anhy} {\mathrm{AlCl}}_3}{\to } \mathrm{A} + 2\left[\mathrm{H}\right] \underset{{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}}{\overset{\mathrm{Zn}-\mathrm{Cu}}{\to }} \mathrm{B} + \mathrm{HCl}$

• CH₄

• C₂H₆

• C₂H₅Cl

• C₂H₅OH

Which of the following compound(s) has 'Z' configuration ?

• (i) only

• (ii) only

• (iii) only

• (i) and (iii) only

The structure of the compound formed, when nitrobenzene is reduced by lithium aluminium hydride (LiAlH₄) is

Diels-Alder reaction will not take place with which of the following reactants?

In which of the following, ortho/para substitution by an electrophile is very facile?

• Ntrobenzene

• Phenol

• Benzoic acid 

• Acetophenone