JEE Main Chemistry — Organic Chemistry previous year questions with solutions.
The reason for double helical structure of DNA is operation of
Which one of the following statements is correct?
In the anion $\mathrm{HCOO}^{-}$the two carbon-oxygen bonds are found to be of equal length. What is the reason for it?
Bottles containing $\mathrm{C}_6 \mathrm{H}_5$ l and $\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{I}$ lost their original labels. They were labelled $\mathrm{A}$ and $\mathrm{B}$ for testing $\mathrm{A}$ and $\mathrm{B}$ were separately taken in test tubes and boiled with $\mathrm{NaOH}$ solution. The end solution in each tube was made acidic with dilute $\mathrm{HNO}_3$ and then some $\mathrm{AgNO}_3$ solution was added. Substance B gave a yellow precipitate. Which one of the following statements is true for this experiment?
An ether is more volatile than an alcohol having the same molecular formula. This is due to
Complete hydrolysis of cellulose gives
On mixing a certain alkane with chlorine and irradiating it with ultravioletlight, it forms only one monochloroalkane. This alkane could be
During dehydration of alcohols to alkenes by heating with conc. $\mathrm{H}_2 \mathrm{SO}_4$ the initiation step is
When $\mathrm{CH}_2=\mathrm{CH}-\mathrm{COOH}$ is reduced with $\mathrm{LiAlH}_4$, the compound obtained will be
The correct order of increasing basic nature for the bases $\mathrm{NH}_3, \mathrm{CH}_3 \mathrm{NH}_2$ and $\left(\mathrm{CH}_3\right)_2 \mathrm{NH}$ is
The IUPAC name of $\mathrm{CH}_3 \mathrm{COCH}\left(\mathrm{CH}_3\right)_2$ is
The general formula $\mathrm{C}_{\mathrm{n}} \mathrm{H}_{2 \mathrm{n}} \mathrm{O}_2$ could be for open chain
Butene- 1 may be converted to butane by reaction with
Ethyl isocyanide on hydrolysis in acidic medium generates
Among the following four structures I to IV.     It is true that
The reaction of chloroform with alcoholic $\mathrm{KOH}$ and p-toluidine forms
The functional group, which is found in amino acid is
Which of the following does not show geometrical isomerism?
Which of these will not react with acetylene ?
Racemic mixture is formed by mixing two
A similarity between optical and geometrical isomerism is that
The reaction: $\left(\mathrm{CH}_3\right)_3 \mathrm{C}-\mathrm{Br} \stackrel{\mathrm{H}_2 \mathrm{O}}{\longrightarrow}\left(\mathrm{CH}_3\right)_3-\mathrm{C}-\mathrm{OH}$
What is the product when acetylene reacts with hypochlorous acid ?
$\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{COOH} \underset{\text { red P }}{\stackrel{\mathrm{Cl}_2}{\longrightarrow}} \mathrm{A} \stackrel{\text { alc. } \mathrm{KOH}}{\longrightarrow} \mathrm{B}$. What is $\mathrm{B}$ ?