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All years 2026 2025 2024 2023 2022 2021

Consider the following reactions given major product. Identify the correct reaction.

Consider the following sequence of reactions.

Assuming that the reaction proceeds to completion, then \( 137 \, \text{mg} \) of \( 4 \)-nitrotoluene will produce ______ \( \, \text{mg} \) of B.
[Given molar mass in \( \, \text{g mol}^{-1} \): H \( = 1 \), C \( = 12 \), N \( = 14 \), O \( = 16 \) and Br \( = 80 \)]

The final product \([B]\) is:

Product C of the following reaction sequence will be:

An organic compound \( (\mathrm{P}) \) on treatment with aqueous ammonia under hot condition forms compound \( (\mathrm{Q}) \) which on heating with \( \mathrm{Br_2} \) and \( \mathrm{KOH} \) forms compound \( (\mathrm{R}) \) having molecular formula \( \mathrm{C_6H_7N} \). Names of P, Q and R respectively are:

Consider the following organic reaction sequence. Choose the final product \( (X) \) from the following (consider the major product in all intermediate reactions)

Which statements are True?
A. In Hoffmann bromamide degradation, \( 4 \) moles of \( \mathrm{NaOH} \) and \( 2 \) moles of \( \mathrm{Br_2} \) are consumed per mole of an amide.
B. Hoffmann bromamide reaction is not given by alkyl amides.
C. Primary amines can be synthesized by Hoffmann bromamide degradation.
D. Secondary amide on reaction with \( \mathrm{Br_2} \) and \( \mathrm{NaOH} \) will give secondary amine.
E. The by-products of Hoffmann degradation are \( \mathrm{Na_2CO_3} \), \( \mathrm{NaBr} \) and \( \mathrm{H_2O} \).
Choose the correct answer from the options given below:

The correct stability order of the following diazonium salts is :

Identify compounds A and E in the following reaction sequence.

10.

Identify the incorrect statements.

Choose the correct answer from the options given below:

11.

Arrange the following compounds according to increasing order of boiling points.
\( \mathrm{n-C_4H_9OH (A)}, \mathrm{ n-C_4H_9NH_2 (B)}, \mathrm{ n-C_4H_{10} (C)} \) and \( \mathrm{C_2H_5NHC_2H_5 (D)} \).

12.

Consider the following reaction.

The major product \((P)\) formed is:

13.

Match List-I with List-II.

List-I Mixture of Compounds	List-II Reagent used to distinguish
A. Diethyl amine + Ethyl amine B. Acetaldehyde + Acetone C. Ethanol + Phenol D. Benzoic acid + Cinnamic acid	I. Bromine water II. \( \mathrm{CHCl_3 + KOH, \Delta} \) III. Neutral \( \mathrm{FeCl_3} \) IV. Ammonical silver nitrate

Choose the correct answer from the options given below:

14.

Consider the following reactions sequence

When the product (P) is subjected to Carius analysis using \( \text{AgNO}_{3} \), \( 1.0 \, \text{g} \) of the product (P) will produce ________ \( \text{g} \) of the precipitate of \( \text{AgBr} \). (Nearest Integer)
(Given : molar mass in \( \text{g mol}^{-1} \) C : \( 12 \); H : \( 1 \); O : \( 16 \); N : \( 14 \); Br : \( 80 \); Ag : \( 108 \))

15.

In the light of the above statements, choose the correct answer from the options given below:

16.

Consider the following sequence of reactions.

The percentage of nitrogen in the yellow product (X) formed is ________ %. (Nearest Integer)
(Given Molar mass in \( \text{g} \, \text{mol}^{-1} \) H: \( 1 \), C: \( 12 \), N: \( 14 \))

17.

A student has been given a compound "\( x \)" of molecular formula \( \mathrm{C_6H_7N} \). ‘\( x \)’ is sparingly soluble in water. However, on addition of dilute mineral acid, ‘\( x \)’ becomes soluble in water. ‘\( x \)’ when treated with \( \mathrm{CHCl_3} \) and \( \mathrm{KOH\ (alc)} \), ‘\( y \)’ is produced. ‘\( y \)’ has a specific unpleasant smell. On treatment with benzene sulphonyl chloride, ‘\( x \)’ gives a compound ‘\( z \)’ which is soluble in alkali. The number of different “\( \mathrm{H} \)” atoms present in ‘\( z \)’ is:

18.

‘A’ is a neutral organic compound (M. F : \( \mathrm{C_8H_9ON} \)). On treatment with aqueous \( \mathrm{Br_2} \) \( / \) \( \mathrm{HO^{(-)}} \), ‘A’ forms a compound ‘B’ which is soluble in dilute acid. ‘B’ on treatment with aqueous \( \mathrm{NaNO_2} \) \( / \) \( \mathrm{HCl} \) \( (0\text{-}5^\circ \mathrm{C}) \) produces a compound ‘C’ which on treatment with \( \mathrm{CuCN} \) \( / \) \( \mathrm{NaCN} \) produces ‘D’. Hydrolysis of ‘D’ produces ‘E’ which is also obtainable from the hydrolysis of ‘A’. ‘E’ on treatment with acidified \( \mathrm{KMnO_4} \) produces ‘F’. ‘F’ contains two different types of hydrogen atoms. The structure of ‘A’ is:

19.

Consider the above sequence of reactions. The number of bromine atom(s) in the final product \( (P) \) will be:

20.

The number of compounds from the following which can undergo reaction with \( \mathrm{Br_2/KOH} \) (alcoholic) to give respective products and these respective products can also be obtained separately by Gabriel phthalimide reaction is:

21.

A student has planned to prepare acetanilide from aniline using acetic anhydride. The student has started from \( 9.3 \, \text{g} \) of aniline. However, the student has managed to obtain \( 11 \, \text{g} \) of dry acetanilide. The \( \% \) yield of this reaction is:

22.

Compound ‘P’ undergoes the following sequence of reactions:

23.

Consider the three aromatic molecules (P, Q and R) whose structures have been given below:

The correct order regarding the reactivity of these compounds with under optimum but slightly acidic medium is:

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JEE MAIN 2026 28TH Jan Morning Shift

Consider the following reactions given major product. Identify the correct reaction.

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JEE Mains JEE Advance BITSAT
JEE Mains | PYQ