Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main 202120 JulyEvening Shift
Exam
JEE Main
Year
2021
Date
20 July
Shift
Evening Shift
Subject
Chemistry
Chapter
Amines

JEE Main 2021 · 20 July · Evening Shift · Chemistry · Amines

In the above reactions, product A and product B respectively are:

In the above reactions, product A and product B respectively are:

In the above reactions, product A and product B respectively are:

Options

  1. A∑_ k=1 ^ 40 ( 1+(1)/(k^2)+(1)/((k+1)^2) )=a+(b)/(c) where a, b, c ∈ ℕ, b < c, gcd(b, c)=1 , then what is the value of
  2. B∑_ k=1 ^ 40 ( 1+(1)/(k^2)+(1)/((k+1)^2) )=a+(b)/(c) where a, b, c ∈ ℕ, b < c, gcd(b, c)=1 , then what is the value of
  3. C∑_ k=1 ^ 40 ( 1+(1)/(k^2)+(1)/((k+1)^2) )=a+(b)/(c) where a, b, c ∈ ℕ, b < c, gcd(b, c)=1 , then what is the value of
  4. D∑_ k=1 ^ 40 ( 1+(1)/(k^2)+(1)/((k+1)^2) )=a+(b)/(c) where a, b, c ∈ ℕ, b < c, gcd(b, c)=1 , then what is the value of

Correct answer

D. ∑_ k=1 ^ 40 ( 1+(1)/(k^2)+(1)/((k+1)^2) )=a+(b)/(c) where a, b, c ∈ ℕ, b < c, gcd(b, c)=1 , then what is the value of

Step-by-step solution

One very common reaction of amide is Hoffmann's bromamide reaction in which amide get converted into amine having one carbon less than amide. For this reaction reagent is (Br2/KOHorKOBr)( {Br}_{2} / KOHorKOBr ).

Lithium aluminium hydride is very strong reducing agent which will convert amide into amine. Number of carbon is same in both amide and amine.

In the above reactions, product A and product B respectively are:

Practice Amines on Quantrex Academy →

More from Amines

Match the major products obtained in the reactions given in List-I with the corresponding… JEE Advanced 2026In the following reaction sequence, P , Q , S and T are the major products. The correct… JEE Advanced 2026Passage: Consider the following reaction sequence in which J , K , L and M are the major… JEE Advanced 2026Which statements are True? A. In Hoffmann bromamide degradation, 4 moles of NaOH and 2… JEE Main 2026Consider the following organic reaction sequence. Choose the final product (X) from the… JEE Main 2026The number of compounds from the following which can undergo reaction with Br _2 /KOH… JEE Main 2026Consider the following sequence of reactions. The percentage of nitrogen in the yellow… JEE Main 2026Given below are two statements : Statement I: Heating benzamide with bromine in an… JEE Main 2026 Full Amines list All JEE Main PYQs