JEE Main Chemistry — Organic Chemistry previous year questions with solutions.
A compound '$A$' on reaction with '$X$' and '$Y$ produces the same major product but different by product '$a$' and '$b$'. Oxidation of '$a$' gives a substance produced by ants.  '$X$' and '$Y$' respectively are
During halogen test, sodium fusion extract is boiled with concentrated ${\mathrm{HNO}}_{3}$ to
Given below are two statements : Statement I : In 'Lassaigne's Test', when both nitrogen and sulphur are present in an organic compound, sodium thiocyanate is formed. Statement II : If both nitrogen and sulphur are present in an organic compound, then the excess of sodium used in sodium fusion will decompose the sodium thiocyanate formed to give $\mathrm{NaCN}$ and ${\mathrm{Na}}_{2}S$. In the light of the above statements, choose the most appropriate answer from the options a: given below
How many of the given compounds will give a positive Biuret test____? Glycine, Glycylalanine, Tripeptide, Biuret
The major product formed in the given reaction is: 
A sample of $4.5\mathrm{mg}$ of an unknown monohydric alcohol, $R-\mathrm{OH}$ was added to methylmagnesium iodide. A gas is evolved and is collected and its volume measured to be $3.1\mathrm{mL}$. The molecular weight of the unknown alcohol is $g/\mathrm{mol}$.
Which of the following compounds is not aromatic?
Stability of $\alpha$ - Helix structure of proteins depends upon
Which one of the following techniques is not used to spot components of a mixture separated on thin layer chromatographic plate?
A compound '$X$' is acidic and it is soluble in $\mathrm{NaOH}$ solution, but insoluble in ${\mathrm{NaHCO}}_{3}$ solution. Compound '$X$' also gives violet colour with neutral ${\mathrm{FeCl}}_{3}$ solution. The compound '$X$' is
The structure of protein that is unaffected by heating is :
In Carius method of estimation of halogen. $0.45g$ of an organic compound gave $0.36g$ of $\mathrm{AgBr}$. Find out the percentage of bromine in the compound. (Molar masses : $\mathrm{AgBr}=188g{\mathrm{mol}}^{-1}:\mathrm{Br}=80g{\mathrm{mol}}^{-1}$)
 Consider the above reaction and predict the major product.
Which of the following is not an example of benzenoid compound?
Compound '$A$' undergoes following sequence of reactions to give compound '$B$'. The correct structure and chirality of compound '$B$' is [where $\mathrm{Et}$ is $-{C}_{2}{H}_{5}$]  Compound '$A$'
Hex-$4$-ene-$2$-ol on treatment with $\mathrm{PCC}$ gives '$A$'. '$A$' on reaction with sodium hypoiodite gives '$B$', which on further heating with soda lime gives '$C$'. The compound '$C$' is
Given below are two statements. Statement I : The compound  is optically active. Statement II :  is mirror image of above compound $A$. In the light of the above statement, choose the most appropriate answer from the options given below.
 In the above reaction product $B$ is
 In the above reactions, product A and product B respectively are:
Which one of the following compounds will liberate ${\mathrm{CO}}_{2}$, when treated with ${\mathrm{NaHCO}}_{3}?$
Which one of the products of the following reactions does not react with Hinsberg reagent to form sulphonamide?
 Considering the above reaction, $X$ and $Y$ respectively are:
 Consider the above chemical reaction and identify product $A$
Ammonolysis of Alkyl halides followed by the treatment with $\mathrm{NaOH}$ solution can be used to prepare primary, secondary and tertiary amines. The purpose of $\mathrm{NaOH}$ in the reaction is.