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Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - JEE MCQ


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30 Questions MCQ Test - Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers)

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Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 1

Only One Option Correct Type

Direction (Q. Nos. 1-26) This section contains 26 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.

Q. 

What is the major product of the reaction?

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 1

Nucleophilic attack of I- occur at —CH2 of protonated ether giving phenol and benzyl iodide.

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 2

What is the major product of the reaction?

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 2

Nucleophilic attack of CH3H on protonated oxirane occur at more substituted α-carbon.

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Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 3

What is the product of the reaction?

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 3

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 4

What is/are the possible product of the reaction?



Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 4

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 5

What is the way to synthesise?

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 5

Oxymercuration-demercuration brings about Markownikoffs hydration of olefinic bond without rearrangement.

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 6

Which reaction will best perform the synthetic transform ation?

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 6

Diisobutyl aluminium hydride reduces ester to aldehyde which then undergo nucleophilic attack by Grignard's reagent CH3CH2MgBr giving the desired product.

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 7

Which organic compound, will undergo the synthetic transformation ?

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 7


Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 8

Which would be the best reagant to convent compound A to B ?

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 8

Pyridinium chloro chromate (PCC) oxidises 1° alcohols to aldehyde.

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 9

Which of the following diol(s) will not undergo a periodate (HIO4) cleavage? 



Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 9

(II) and (III) are non-v/c/na/diols.

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 10

What is the major product of the reaction? 

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 10

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 11

Which of the following is not a reactive intermediate in the mechanism of the following reaction producing either product ?

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 11

Oxo anion is not formed in acidic medium.

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 12

Predict the major product of the reaction.

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 12

Nucleophilic attack of occur at less hindered α-carbon of oxirane.

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 13

Which of the following alcohols cannot be synthesised using the reaction sequence ?

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 13

Grignard’s reagent attacks at —CN group also.

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 14

Which of the following pairs of the compounds can be used as starting materials in the synthesis of 2-phenyl-2-hexanol?

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 14

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 15

Which of the following sequence can be used to make

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 15

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 16

Which of the following reaction will most efficiently synthesise compound X (3-methyl-3-methoxy hexane) from 2-butanone, 1-chioropropane and methyl iodide ?

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 16



 

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 17

When 4-pentene-1 -ol is treated with aqueous bromide, a cyclic bromosubstituted ether is formed rather than expected bromohydrane. Select the explanation that the best account for the result.

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 17

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 18

Which of the following will react with periodic acid to produce an aldehyde product ?

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 18

Vicinal diots undergo oxidative cleavage with HIO4

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 19

Which reaction condition would be best to perform the following transformation?

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 19

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 20

What will be the major product of the reaction ?

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 20

E2 elimination occur from anti-position. Also the better leaving group (tosylate) is eliminated.

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 21

What is the major product of the reaction?

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 21

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 22

Consider the molecule,

Q.

Which reagent will not give a positive test with this compound ?

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 22

 Alkene does not react with alkali.

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 23

Which reagent w ould provide the product shown ?  2-methyl oxirane

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 23

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 24

Chloroethane, C2H5CI, does not react with methanol under mild conditions. What reagent could be added to the reaction mixture to increase the rate of substitution?

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 24

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 25

Which reaction conditions would be best for the synthesis of isobutyl sec-butyl ether CH3CH2CH (CH3)-O-CH2CH(CH3)2?

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 25

SN2 reaction is preferred at 1° alkyl halide.

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 26

A C6H14O chiral alcohol is converted to a bromide by treating with PBr3. Reaction of this bromide, first with Mg in ether, followed by quenching in 0.1 N HCI produces an achiral C6H14 hydrocarbon. Which of the following is the original alcohol ?

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 26

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 27

Direction (Q. Nos. 27-30) This section is based on Statement I and Statement II. Select the correct answer from the codes given below. 

Q. 

Statement I : When 1-prop an ol is refluxed with dil. H2SO4, it isomerises to propanol.

Statement II : 2-propanol is more stable than 1-propan

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 27

Isomerisation occur via carbocation intermediate product stability is not the driving force here.

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 28

Statement I : Diphenyl ether (Ph — O — Ph) is very less reactive in acid catalysed hydrolysis to phenol.

Statement II : Oxygen is in resonance on both side with phenyl ring.

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 28

Resonance of oxygen with phenyl rings on both side increases bond order and hence, bond energy of O—C bonds, not hydrolysed.

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 29

Statement I : 3-methyl-2-butanol is more reactive than 2-butanol in acid catalysed dehydration to alkene.

Statement II : 3-methyl-2-butanol forms more stable carbocation than 2-butanol during dehydration reaction.

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 29

Acid catalysed dehydration of alcohols proceed via carbocation intermediates. Hence, greater the stability of carbocation, greater the reactivity of corresponding alcohols.

Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 30

Statement I : Reaction of C2H5ONa with 2-chloro propane is a better method than the reaction of (CH3)2 CHONa with chloro ethane in order to prepare ethyl-isopropyl ether.

Statement II : Here ether is formed by SN2 reaction mechanism

Detailed Solution for Revisal Problems (Past 13 Year) JEE Main (Alcohols Phenols And Ethers) - Question 30

SN2 reaction would occur more easily with primary alkyl halide chloro ethane rather than with secondary 2-chloropropane.

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