Test: Reaction Mechanism- 4


30 Questions MCQ Test Organic Chemistry | Test: Reaction Mechanism- 4


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QUESTION: 1

 For the reaction below if the concentration of KCN is increased four times, the rate of the reaction will be:

Solution:

This is an SN1 reaction, so, rate of the reaction only depends on substrate, it doesn't depend on nucleophile. Hence change in concentration of the nucleophile won't affect the rate.

C is correct.

QUESTION: 2

The major product formed in the reaction of 1, 3-butadiene with bromine is at high temperature:
 

Solution:

When 1,3-butadiene reacts with Br2 at high temperature (heating) then 1,4- addition to diene takes place, so mainly 1,4-dibromobut-2-ene is formed. But at low-temperature 1,2-addition dominates and 3,4-dibromobut-1-ene is major product

QUESTION: 3

The products formed in the following reaction is:

Solution:
QUESTION: 4

 In the reaction sequence 

The product (Y) is:
 

Solution:
QUESTION: 5

 The major product of the reaction

Solution:
QUESTION: 6

 The major product formed in the following reaction.

Solution:
QUESTION: 7

The major product formed in the following reaction.

Solution:
QUESTION: 8

The major product obtained in the following reaction

Solution:
QUESTION: 9

The major product formed in the following reaction is:

Solution:
QUESTION: 10

Choose the correct order of reactivity for dehydration of the given alcohols using concentrated sulfuric acid.
 

Solution:
QUESTION: 11

 Electrophilic nitrations of the following compounds follow the trend:

Solution:
QUESTION: 12

Elimination reactions of compounds 1 and 2 with sodium ethoxide give two alkenes, A and B, but with different selectivities. Which of the following statements best indicates the most probable outcome?

Solution:
QUESTION: 13

What would be the final major product of the following chemical reaction if it is carried out twice, one at 5 Co and the second time at 45 C0?

Solution:
QUESTION: 14

What is the major product if HBr (in excess) is added to H2C = CH – CH2 – OH

Solution:
QUESTION: 15

 The reaction of sodium ethoxide with ethyl iodide to form diethyl ether is termed

Solution:
QUESTION: 16

What is the final product after the following reaction has gone to completion?

Solution:
QUESTION: 17

The major product formed in the following reaction is:

Solution:
QUESTION: 18

 Among the bromides I-III given below, the order of their reactivity in the SN1 reaction is:

Solution:
QUESTION: 19

 The major product formed in the reaction benzoic acid with isobutylene in the presence of a catalytic amount of sulfuric acid is:
 

Solution:
QUESTION: 20

Among the following compounds, the one that undergoes deprotonation most readily in the presence of a base, to form a carbanion is:
 

Solution:
QUESTION: 21

 Regarding the saponification of M and N shown below, the correct statement is that

Solution:
QUESTION: 22

The major product P formed in the given: 

Solution:
QUESTION: 23

 Iodo-lactonization of β, γ- unsaturated carboxylic acid X with I2 and NaHCO3 gives:

Solution:
QUESTION: 24

 The major product formed in the following reaction is:

Solution:
QUESTION: 25

 Predict the major product P in the following reaction:
 

Solution:
QUESTION: 26

The major product formed in the following reaction is:
 

Solution:
QUESTION: 27

 The major product obtained treatment of compound X with H2SO4 at 80°C is:


 

Solution:
QUESTION: 28

 In the following compound, the hydroxy group that is most readily Methylated with C2H2N2 is

Solution:
QUESTION: 29

 In the reaction, the major product X is:

Solution:
QUESTION: 30

 In the reaction, the major product X is:
 

Solution:

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