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 Multiple Choice QuestionsMultiple Choice Questions

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1.

Freon used as refrigerant is

  • CF2=CF2

  • CH2F2

  • CCl2F2

  • CF4


2.

2-Phenylethylbromide when heated with NaOEt, elimination takes place. No deuterium exchange takes place when the reaction is carried out in C2H5OD solvent. The mechanism will be

  • E1 elimination

  • E2 elimination

  • E1 cB elimination

  • E2 or E1cB


3.

For the following reactions,

i) CH3 CH2 CH2Br + KOH --> CH3CH=CH2 +KBr +H2O

ii)  


iii) 

  • (i) is elimination reaction, (ii) is substitution reaction, and (iii) is addition reaction.

  • (i) is elimination reaction, (ii) is addition reaction, (iii) is substitution reactions.

  • (i) is substitution, (ii) addition reaction (iii) is addition reactions

  • (i) is substitution, (ii) addition reaction (iii) is addition reactions

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4.

In which of the following compounds, the C-Cl bond ionisation shall give most stable carbonium ions?

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5.

The reaction of C6H5CH=CHCH3 with HBr produces

  • C6H5CH2CH2CH2Br

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6.

A single compound of the structure is



obtainable from ozonolysis of which of the following cyclic compound?

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7.

Which of the following is a correct electron displacement for a nucleophilic reaction to take place? 

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8.

Given,


The enthalpy of hydrogenation of these compounds will be in the order as

  • I>II>III

  • I<II<III

  • II>III>I

  • II>III>I

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9.

Identity Z in the sequence of reactions.
CH subscript 3 CH subscript 2 CH equals CH subscript 2 space rightwards arrow with HBr divided by straight H subscript 2 straight O subscript 2 on top space straight Y
space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space rightwards arrow with straight C subscript 2 straight H subscript 5 ONa on top space straight Z

  • CH3-(CH2)3-O-CH2CH3

  • (CH3)2CH2-O-CH2CH3

  • CH3(CH2)4-O-CH2CH3

  • CH3(CH2)4-O-CH2CH3

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10.

What products are formed when the following compounds is treated with Br2 in the presence of FeBr3?

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