JEE Main Chemistry — Organic Chemistry previous year questions with solutions.
Given below are two statements. One is labelled as Assertion $A$ and the other is labelled as Reason $R$. Assertion $A:[6]$ Annulene. $[8]$ Annulene and cis $-[10]$ Annulene, are respectively aromatic, not-aromatic and aromatic.  Reason $R$: Planarity is one of the requirements of aromatic systems. In the light of the above statements, choose the most appropriate answer from the options given below.
Which technique among the following, is most appropriate in separation of a mixture of $100\mathrm{mg}$ of $p$-nitrophenol and picric acid?
Which one of the following reactions does not represent correct combination of substrate and product under the given conditions?
In the estimation of bromine, $0.5g$ of an organic compound gave $0.40g$ of silver bromide. The percentage of bromine in the given compound is $%$ (nearest integer) (Relative atomic masses of $\mathrm{Ag}$ and $\mathrm{Br}$ are $108u$ and $80u$, respectively).
In the following structures, which one is having staggered conformation with maximum dihedral angle?
 In the given conversion the compound $A$ is
 The stable carbocation formed in the above reaction is :
In the following reaction  The $%$ yield for reaction $I$ is $60%$ and that of reaction II is $50%$. The overall yield of the complete reaction is$%$
In the presence of sunlight, benzene reacts with ${\mathrm{Cl}}_{2}$ to give product, $X$. The number of hydrogens in $X$ is
Given below are two statements. One is labelled as Assertion $A$ and the other is labelled as Reason $R$. Assertion $A$ : Amylose is insoluble in water. Reason $R$ : Amylose is a long linear molecule with more than $200$ glucose units. In the light of the above statements, choose the correct answer from the options given below.
$0.2g$ of an organic compound was subjected to estimation of nitrogen by Dumas method in which volume of ${N}_{2}$ evolved (at STP) was found to be $22.400\mathrm{mL}$. The percentage of nitrogen in the compound is - [nearest integer] (Given: Molar mass of ${N}_{2}$ is $28g{\mathrm{mol}}^{-1}$, Molar volume of ${N}_{2}$ at $\mathrm{STP}:22.4L$)
Which of the following carbocations is most stable:
 Find out the major product for the above reaction.
Given below are two statements. Statement I: Maltose has two $\alpha -D-\mathrm{glucose}$ units linked at ${C}_{1}$ and ${C}_{4}$ and is a reducing sugar. Statement II: Maltose has two monosaccharides: $\alpha$-$D$-glucose and $\beta$-$D$-glucose linked at ${C}_{1}$ and ${C}_{6}$ and it is a non-reducing sugar. In the light of the above statements, choose the correct answer from the options Question: given below.
Given below are two statements : Statement - I : In Hofmann degradation reaction, the migration of only an alkyl group takes place from carbonyl carbon of the amide to the nitrogen atom. Statement - II : The group is migrated in Hofmann degradation reaction to electron deficient atom. In the light of the above statements, choose the most appropriate answer from the options given below
The major product $P$ of the given reaction is (where, $\mathrm{Me}$ is $-{\mathrm{CH}}_{3}$) 
$\overset{˙}{\mathrm{Cl}}+{\mathrm{CH}}_{4}\rightarrow A+B$ $A$ and $B$ in the above atmospheric reaction step are
 Considering the above reactions, the compound '$A$' and compound '$B$' respectively are
Which of the following is an example of conjugated diketone?
 Consider the above reaction. The number of $\pi$ electrons present in the product '$P$' is
$L$-isomer of a compound $A''({C}_{4}{H}_{8}{O}_{4})$gives a positive test with ${[\mathrm{Ag}{({\mathrm{NH}}_{3})}_{2}]}^{+}$. Treatment of '$A$' with acetic anhydride yields triacetate derivative. Compound '$A$' produces an optically active compound $(B)$ and an optically inactive compound $(C)$ on treatment with bromine water and ${\mathrm{HNO}}_{3}$ respectively. Compound $(A)$ is :
The total number of monobromo derivatives formed by the alkanes with molecular formula ${C}_{5}{H}_{12}$ is (excluding stereo isomers)
Identify the major product formed in the following sequence of reactions : 