JEE Main Chemistry — Organic Chemistry previous year questions with solutions.
Which one of the following gives the most stable Diazonium salt ?
$R-\mathrm{CN}\frac{(i)\mathrm{DIBAL}-H}{(\mathrm{ii}){H}_{2}O}\longrightarrow R-Y$ Consider the above reaction and identify "Y"
Which one of the following compounds contains $\beta -{C}_{1}-{C}_{4}$ glycosidic linkage ?
What is A in the following reaction? 
 Consider the given reaction, percentage yield of :
An amine on reaction with benzenesulphonyl chloride produces a compound insoluble in alkaline solution. This amine can be prepared by ammonolysis of ethyl chloride. The correct structure of amine is:
The correct structure of Ruhemann's Purple, the compound formed in the reaction of Ninhydrin with proteins is:
$A$ and $B$ in the following reactions are: 
Identify the incorrect statement from the following.
Given below are two statements: Statement $I$: A mixture of chloroform and aniline can be separated by simple distillation. Statement $\mathrm{II}$: When separating aniline from a mixture of aniline and water by steam distillation aniline boils below its boiling point. In the light of the above statements, choose the most appropriate answer from the options given below:
 In the above reactions, the enzyme $A$ and enzyme B respectively are :-
The stereoisomers that are formed by electrophilic addition of bromine to $\mathrm{trans}-\mathrm{but}-2-\mathrm{ene}$ is/are :
The dihedral angle in staggered form of Newmann's projection of$1,1,1$-Trichloro ethane is $\ldots \ldots \ldots$degree. (Round off to the nearest integer) (Round off to the nearest integer)
Reaction of Grignard reagent, ${C}_{2}{H}_{5}\mathrm{MgBr}$ with ${C}_{8}{H}_{8}O$ followed by hydrolysis gives compound $A$, which reacts instantly with Lucas reagent to give compound $B({C}_{10}{H}_{13}\mathrm{Cl}).$ The Compound $B$ is:
 Consider the given reaction, the Product $A$ is:
The transformation occurring in Duma's method is given below ${C}_{2}{H}_{7}N+(2x+\frac{y}{2})\mathrm{CuO}\rightarrow {\mathrm{xCO}}_{2}+\frac{y}{2}{H}_{2}O+\frac{z}{2}{N}_{2}+(2x+\frac{y}{2})\mathrm{Cu}$ The value of $y$ is (Integer answer)
Which one of the following compounds is not aromatic?
A chloro compound "A". (i) forms aldehydes on ozonolysis followed by the hydrolysis. (ii) when vaporized completely $1.53g$ of $A$, gives $448\mathrm{mL}$ of vapour at STP. The number of carbon atoms in a molecule of compound $A$ is
When $10\mathrm{mL}$ of an aqueous solution of ${\mathrm{KMnO}}_{4}$ was titrated in acidic medium, equal volume of $0.1M$ of an aqueous solution of ferrous sulphate was required for complete discharge of colour. The strength of ${\mathrm{KMnO}}_{4}$ in grams per litre is _______$\times {10}^{-2}.$ (Nearest integer) [Atomic mass of $K=39,\mathrm{Mn}=55,O=16$]
Which one of the following set of elements can be detected using sodium fusion extract?
The number of acyclic structural isomers (including geometrical isomers) for pentene are
Which of the following compounds does not exhibit resonance ?
Which of the following molecules does not show stereo isomerism ?
Compound with molecular formula ${C}_{3}{H}_{6}O$ can show: