JEE Main Chemistry — Organic Chemistry previous year questions with solutions.
Given below are two statements : Statement (I) : \(\mathrm{S}_{\mathrm{N}} 2\) reactions are 'stereospecific', indicating that they result in the formation of only one stereo-isomer as the product. Statement (II) : \(\mathrm{S}_{\mathrm{N}} 1\) reactions generally result in formation of product as racemic mixtures. In the light of the above statements, choose the correct answer from the options given below :
 The correct arrangement for decreasing order of electrophilic substitution for above compounds is :
Identify the correct set of reagents or reaction conditions ' \(X\) ' and ' \(Y\) ' in the following set of transformation 
 The total number of hydrogen atoms in product $A$ and product $B$ is__________.
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : Aryl halides cannot be prepared by replacement of hydroxyl group of phenol by halogen atom. Reason R : Phenols react with halogen acids violently. In the light of the above statements, choose the most appropriate from the options given below:
Identify B formed in the reaction. $\mathrm{Cl}-{({\mathrm{CH}}_{2})}_{4}-\mathrm{Cl}\overset{\mathrm{excess}{\mathrm{NH}}_{3}}{\rightarrow }A\overset{\mathrm{NaOH}}{\rightarrow }B+{H}_{2}O+\mathrm{NaCl}$
In Reimer - Tiemann reaction, phenol is converted into salicylaldehyde through an intermediate. The structure of intermediate is _____
 Consider the above reaction sequence and identify the major product \(P\).
Salicylaldehyde is synthesized from phenol, when reacted with
Major product formed in the following reaction is a mixture of: 
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: Assertion A: $p{K}_{a}$ value of phenol is $10.0$ while that of ethanol is $15.9$. Reason R: Ethanol is stronger acid than phenol. In the light of the above statements, choose the correct answer from the options given below:
Phenolic group can be identified by a positive:
Which of the following compounds will give silver mirror with ammoniacal silver nitrate? A. Formic acid B. Formaldehyde C. Benzaldehyde D. Acetone Choose the correct answer from the options given below :
Identify major product " \(\mathrm{X}\) " formed in the following reaction : 
Identify ' \(A\) ' in the following reaction: 
The number of the correct reaction(s) among the following is ______ 
Given below are two statements : Statements I : Acidity of \(\alpha\)-hydrogens of aldehydes and ketones is responsible for Aldol reaction. Statement II : Reaction between benzaldehyde and ethanal will NOT give Cross - Aldol product. In the light of the above statements, choose the most appropriate answer from the options given below :
Match List – I with List –II.  Choose the correct answer from options given below:
Major product \(B\) of the following reaction has _______ \(\pi\)-bond. 
 The ratio of number of oxygen atoms to bromine atoms in the product \(\mathrm{Q}\) is ______ \(\times 10^{-1}\).
\(\mathrm{X} \mathrm{g}\) of ethylamine is subjected to reaction with \(\mathrm{NaNO}_2 / \mathrm{HCl}\) followed by water; evolved dinitrogen gas which occupied \(2.24 \mathrm{~L}\) volume at STP. \(\mathrm{X}\) is \(\qquad\) \(\times 10^{-1} \mathrm{~g}\).
Number of compounds which give reaction with Hinsberg's reagent is _________. 
Phthalimide is made to undergo following sequence of reactions.  Total number of \(\pi\) bonds present in product 'P' is/are ______
Given below are two statements : Statement I: Aniline reacts with con. ${H}_{2}{\mathrm{SO}}_{4}$ followed by heating at $453-473K$ gives p-aminobenzene sulphonic acid, which gives blood red colour in the 'Lassaigne's test'. Statement II: In Friedel - Craft's alkylation and acylation reactions, aniline forms salt with the ${\mathrm{AlCl}}_{3}$ catalyst. Due to this, nitrogen of aniline acquires a positive charge and acts as deactivating group. In the light of the above statements, choose the correct answer from the options given below :