JEE Main Chemistry — Organic Chemistry previous year questions with solutions.
Which of the following arrangements with respect to their reactivity in nucleophilic addition reaction is correct?
The total number of hydrogen bonds of a DNA-double Helix strand whose one strand has the following sequence of bases is_______. $5^{\prime}$ - G - G-C-A-A-A-T-C-G-G-C-T-A-3'
In Dumas' method 292 mg of an organic compound released 50 mL of nitrogen gas $\left(\mathrm{N}_2\right)$ at 300 K temperature and 715 mm Hg pressure. The percentage composition of ' N ' in the organic compound is ________ % (Nearest integer) (Aqueous tension at $300 \mathrm{~K}=15 \mathrm{~mm} \mathrm{Hg}$)
The ascending order of relative rate of solvolysis of following compounds is : 
Identify correct conversion during acidic hydrolysis from the following : (A) starch gives galactose. (B) cane sugar gives equal amount of glucose and fructose. (C) milk sugar gives glucose and galactose. (D) amylopectin gives glucose and fructose. (E) amylose gives only glucose. Choose the correct answer from the options given below :
Given below are two statements : Statement (I) : On nitration of m-xylene with $\mathrm{HNO}_3, \mathrm{H}_2 \mathrm{SO}_4$ followed by oxidation, 4-nitrobenzene-1,3-dicarboxylic acid is obtained as the major product. Statement (II) : $-\mathrm{CH}_3$ group is o/p-directing while $-\mathrm{NO}_2$ group is m-directing group. In the light of the above statements, choose the correct answer from the options given below :
What is the correct IUPAC name of 
Which of the following is the correct IUPAC name of given organic compound $(\mathrm{X})$ ? 
For reaction  The correct order of set of reagents for the above conversion is :
Identify the correct statements from the following  Choose the correct answer from the options given below
Given below are two statements: Statement I: In Lassaigne's test, the covalent organic molecules are transformed into ionic compounds. Statement II: The sodium fusion extract of an organic compound having N and S gives prussian blue colour with $\mathrm{FeSO}_4$ and $\mathrm{Na}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]$ In the light of the above statements, choose the correct answer from the options given below.
The number of optically active products obtained from the complete ozonolysis of the given compound is : 
The purification method based on the following physical transformation is : 
Identify the pair of reactants that upon reaction, with elimination of HCl will give rise to the dipeptide Gly-Ala.
The IUPAC name of the following compound is : 
The major product of the following reaction is : 
Given below are two statements : Statement I : $\mathrm{CH}_3-\mathrm{O}-\mathrm{CH}_2-\mathrm{Cl}$ will undergo $\mathrm{S}_{\mathrm{N}} 1$ reaction though it is a primary halide. Statement II :  will not undergo $S_N 2$ reaction very easily though it is a primary halide. In the light of the above statements, choose the most appropriate answer from the options given below :
Consider the following sequence of reactions to produce major product (A)  Molar mass of product $(\mathrm{A})$ is $\qquad$ $\mathrm{g} \mathrm{mol}^{-1}$. (Given molar mass in $\mathrm{g} \mathrm{mol}^{-1}$ of $\mathrm{C}: 12, \mathrm{H}: 1, \mathrm{O}: 16, \mathrm{Br}: 80, \mathrm{~N}: 14, \mathrm{P}: 31$ )
Given below are two statements : Statement I : Wet cotton clothes made of cellulose based carbohydrate takes comparatively longer time to get dried than wet nylon polymer based clothes. Statement II : Intermolecular hydrogen bonding with water molecule is more in nylon-based clothes than in the case of cotton clothes. In the light of above statements, choose the Correct answer from the options given below
Given below are two statements I and II. Statement I: Dumas method is used for estimation of "Nitrogen" in an organic compound. Statement II: Dumas method involves the formation of ammonium sulphate by heating the organic compound with conc $\mathrm{H}_2 \mathrm{SO}_4$. In the light of the above statements, choose the correct answer from the options given below
Consider the following sequence of reactions :  Molar mass of the product formed $(A)$ is _______ $\mathrm{g} \mathrm{mol}^{-1}$.
Identify the products $[A]$ and $[B]$, respectively in the following reaction : 
The molecular formula of benzene is: