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Retro (Past 13 Year) IIT-JEE Advanced (Alkyl Halides) - JEE MCQ


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5 Questions MCQ Test - Retro (Past 13 Year) IIT-JEE Advanced (Alkyl Halides)

Retro (Past 13 Year) IIT-JEE Advanced (Alkyl Halides) for JEE 2024 is part of JEE preparation. The Retro (Past 13 Year) IIT-JEE Advanced (Alkyl Halides) questions and answers have been prepared according to the JEE exam syllabus.The Retro (Past 13 Year) IIT-JEE Advanced (Alkyl Halides) MCQs are made for JEE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Retro (Past 13 Year) IIT-JEE Advanced (Alkyl Halides) below.
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Retro (Past 13 Year) IIT-JEE Advanced (Alkyl Halides) - Question 1

The following compound on hydrolysis in aqueous acetone will give




Q. 

It mainly gives

(2005, Only One Option Correct Type)

Detailed Solution for Retro (Past 13 Year) IIT-JEE Advanced (Alkyl Halides) - Question 1

Reaction proceed through carbocation intermediate


Retro (Past 13 Year) IIT-JEE Advanced (Alkyl Halides) - Question 2

Match the chemical conversion in Column I with the appropriate reagents in Column II and select the correct answer using the code given below the lists.

Detailed Solution for Retro (Past 13 Year) IIT-JEE Advanced (Alkyl Halides) - Question 2

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Retro (Past 13 Year) IIT-JEE Advanced (Alkyl Halides) - Question 3

KI in acetone, undergoes SN2 reaction with each P, Q, R and S. The rates of the reaction vary as

(2013 Adv., Only One Option Correct Type)

Detailed Solution for Retro (Past 13 Year) IIT-JEE Advanced (Alkyl Halides) - Question 3

Acetone is an aprotic solvent and can dissolve both the nucleophile and the substrate and thus SN2 reaction is Savoured. Also



Thus, reactivity order is S > P > R > Q

*Answer can only contain numeric values
Retro (Past 13 Year) IIT-JEE Advanced (Alkyl Halides) - Question 4

The total number of alkenes possible by dehydrobromination of 3-bromo-3-cyclopentylhexane using alcoholic KOH is

(2011, Integer Type)


Detailed Solution for Retro (Past 13 Year) IIT-JEE Advanced (Alkyl Halides) - Question 4

The substrate has three different types of B—H, therefore, first, three structural isomers of alkenes are expected as

The last two alkenes (II) and (III) are also capable of showing geometrical isomerism hence, two geometrical isomers for each of them will be counted giving a total of five isomers.

Retro (Past 13 Year) IIT-JEE Advanced (Alkyl Halides) - Question 5

The major product of the following reaction is

(2008, Only One Option Correct Type)

Detailed Solution for Retro (Past 13 Year) IIT-JEE Advanced (Alkyl Halides) - Question 5

PhS- is a strong nucleophile and dimethylformamide (DMF) is a highly polar aprotic solvent. The condition indicates that nucleophilic substitution (SN2) takes place at 2° benzylic place, stereochemically it involves inversion of configuration.

Aryl group exhibits neighbouring group or can show anchimeric assistance but not possible here due to deactivity imparted by  -NO2 and -F. It can be if -OCH3 would have been instead of -NO2 

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