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

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 Multiple Choice QuestionsMultiple Choice Questions

101.

Consider the following reactions,

C2H2 500°Cred hot iron tube A

70°Cconc. HNO3, conc. H2SO4 B

LiAlH4 C6H5-N=N-C6N5

A and B are

  • A = C2H4; B = C6H6

  • A = C2H6; B = C6H5NH2

  • A = C2H4; B = C6H5NH2

  • A = C6H6; B = C6H5NO2


102.

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

  • NaOH

  • H2SO4

  • C2H5ONa

  • Na2S2O3


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103.

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

  • Wurtz reaction

  • Kolbe's reaction

  • Ulmann's reaction

  • Frankland reaction


D.

Frankland reaction

(i) Wurtz reaction2RX + 2Na Ether R-R alkane (ii) Kolbe's reaction RCOONa + H2O Electrolysis  R-Ralkane (iii) Ulmann's reaction 2C6H5I + 2Cu  C6H5-C6H5biphenyl(iv) Frankland reaction2RX + Znalky halide   R-Ralkane 


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104.

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

  • Two, primary

  • Three, primary

  • Two, secondary

  • One, tertiary


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105.

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


106.

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

C2H4Br2 → C2H2

  • addition

  • dehydrohalogination

  • substitution

  • debromination


107.

Match the following lists
List I List II
(A) Benzene 1. Phosegen
(B) Ethylene 2. Silver mirror
(C) Acetaldehyde 3. Mustard gas
(D) Chloroform 4. (4n+2)Π electron
  5.Carbylamine

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


108.

Match the following lists:
List- I List- II
A. Grignard reagent 1. H2/ Pd-BaSO4
B. Clemmensen reduction 2. N2H4 | KOH | (CH2)2-OH
C. Rosenmund reduction 3. CH3Mg X
D. Wolff-Kishner reduction

4. Zn-Hg | conc. HCl

5. H2| Ni

  • 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


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109.

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


110.

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


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