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CBSE

Subject

Chemistry
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NEET Chemistry : Haloalkanes and Haloarenes

Multiple Choice Questions

21.

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



22.

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



23.

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

  • toluene

  • chlorobenzene

  • benzylchloride

  • benzylchloride



24.

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



25.

A ( Predominantly) is


26.

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



27.

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



28.

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



29.

Ethylene oxide when treated with Grignard reagent yields:

  • Secondary alcohol

  • tertiary alcohol

  • cyclopropyl alcohol

  • cyclopropyl alcohol



30.

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)



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