In an SN2  substitution reaction of the type which  one of the followings has the highest relative rate? | Haloalkanes and Haloarenes

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

21.

In the following reaction, straight C subscript 6 straight H subscript 5 CH subscript 2 Br space rightwards arrow from 2. space straight H subscript 3 straight O to the power of plus to 1. space Mg comma space Ether of space straight X comma the product 'X' is

  • C6H5CH2OCH2C6H5

  • C6H5CH2OH

  • C6H5CH3

  • C6H5CH3

510 Views

22.

Which of the following reactions is an example of nucleophilic substitution reaction?

  • RX + KOH → ROH + KX

  • 2RX + 2Na → R- R 

  • RX + H2 → RH + HX

  • RX + H2 → RH + HX

385 Views

23.

Consider the following reaction,


ethanol space rightwards arrow with PBr subscript 3 on top space straight X space rightwards arrow with alc. space KOH on top space straight Y space rightwards arrow from left parenthesis ii right parenthesis space straight H subscript 2 straight O comma space heat to left parenthesis straight i right parenthesis space straight H subscript 2 SO subscript 4 of space straight Z semicolon
the product Z, is

  • CH2 = CH2

  • CH3CH2-O-CH2-CH3

  • CH3-CH2-O-SO3H

  • CH3-CH2-O-SO3H

476 Views

24.

Benzene reacts with CH3Cl in the presence of anhydrous AlCl3 to form

  • toluene

  • chlorobenzene

  • benzylchloride

  • benzylchloride

3261 Views

Advertisement
Advertisement

25.

In an SN2  substitution reaction of the type which  one of the followings has the highest relative rate?

  • CH3-CH2-CH2Br

  • CH3-CH(CH2)-CH2Br

  • CH3C(CH3)2CH2Br

  • CH3CH2Br


D.

CH3CH2Br

The relative reactivity of alkyl halide towards SN N reactions is as follows;
Primary > secondary > Tertiary
However, if the primary alkyl halide or the nucleophile/base is sterically hindered the nucleophile will have difficulty to getting the back side of the alpha carbon as a result of this elimination product will be predominant. Here CH3CH2Br is the least hindered, hence it has the highest relative rate towards SN2 reaction.

373 Views

Advertisement
26.

A ( Predominantly) is
314 Views

27.

Predict the product C obtained in the following reaction of butyne - 1.

CH subscript 3 CH subscript 2 space minus space straight C identical to CH space plus space HCl space rightwards arrow straight B space rightwards arrow with HI on top space straight C


28.

Consider the following compounds:



The correct decreasing order of their reactivity towards hydrolysis is;

  • (ii) >(iv) > (iii) > (i)

  • (i) > (ii) > (iii) > (iv)

  • (iv) > (ii) > (i) > (iii)

  • (iv) > (ii) > (i) > (iii)


Advertisement
29.

Ethylene oxide when treated with Grignard reagent yields:

  • Secondary alcohol

  • tertiary alcohol

  • cyclopropyl alcohol

  • cyclopropyl alcohol

825 Views

30.

Predict the correct intermediate and product in the following reaction

straight H subscript 3 straight C space minus space straight C space identical to space CH rightwards arrow from HgSO subscript 4 to straight H subscript 2 straight O comma space straight H subscript 2 SO subscript 4 of space intermediate with straight A below space rightwards arrow for space of space Product with straight B below

1009 Views

Advertisement