Haloalkanes and Haloarenes

Consider the following reactions,

C₂H₂ $\underset{500°\mathrm{C}}{\overset{\mathrm{red} \mathrm{hot} \mathrm{iron} \mathrm{tube}}{\to }}$ A

A $\underset{70°\mathrm{C}}{\overset{\mathrm{conc}. {\mathrm{HNO}}_3, \mathrm{conc}. {\mathrm{H}}_2{\mathrm{SO}}_4}{\to }}$ B

B $\stackrel{{\mathrm{LiAlH}}_4}{\to }$ C₆H₅-N=N-C₆N₅

A and B are

• A = C₂H₄; B = C₆H₆

• A = C₂H₆; B = C₆H₅NH₂

• A = C₂H₄; B = C₆H₅NH₂

• A = C₆H₆; B = C₆H₅NO₂

Chloroethane reacts with X to form diethyl ether. What is X ?

• NaOH

• H₂SO₄

• C₂H₅ONa

• Na₂S₂O₃

Formation of alkane by the action of zinc on alkyl halide is called

• Wurtz reaction

• Kolbe's reaction

• Ulmann's reaction

• Frankland reaction

In chloroethane, the carbon bearing halogen is bonded to ...... hydrogen (s). It is called ........ alkyl halide.

• Two, primary

• Three, primary

• Two, secondary

• One, tertiary

What is the minimum quantity (in grams) of methyl iodide required for preparing one mole of ethane by Wurtz reaction ? (Atomic weight of iodine = 127)

• 142

• 568

• 326

• 284

The following reaction is an example of .......... reaction-

C₂H₄Br₂ → C₂H₂

• addition

• dehydrohalogination

• substitution

• debromination

Match the following lists

The correct answer is

• A B C D

  4 3 2 1

• A B C D

  3 2 1 4

• A B C D

  2 4 5 3

• A B C D

  5 1 4 3

Match the following lists:

• A - 3; B - 4; C - 2; D - 1

• A - 3; B - 4; C - 1; D - 2

• A - 2; B - 1; C - 4; D - 5

• A - 5; B - 3; C - 2; D - 1

The pairs 2R, 3R-butane diol and 2S, 3S-butane diol are enantiomeric.

• 2R, 3R and 2S, 3S

• 2S, 3S and 2S, 3R

• 2R, 3R and 2R, 3S

• 2S, 3S and 2R, 3S

The two enantiomers of secondary butyl chloride differ from each other in which one of the following properties?

• Boiling point

• Specific rotation

• Density

• Cl—Cl bond length