Organic Chemistry PYQ — Page 74
JEE Main Chemistry — Organic Chemistry previous year questions with solutions.
All Organic Chemistry Questions (1783)
The reason for double helical structure of DNA is operation of
On mixing a certain alkane with chlorine and irradiating it with ultravioletlight, it forms only one monochloroalkane. This alkane could be
The general formula $\mathrm{C}_{\mathrm{n}} \mathrm{H}_{2 \mathrm{n}} \mathrm{O}_2$ could be for open chain
Among the following four structures I to IV.     It is true that
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?
Which one of the following statements is correct?
Ethyl isocyanide on hydrolysis in acidic medium generates
An ether is more volatile than an alcohol having the same molecular formula. This is due to
In the anion $\mathrm{HCOO}^{-}$the two carbon-oxygen bonds are found to be of equal length. What is the reason for it?
Complete hydrolysis of cellulose gives
When $\mathrm{CH}_2=\mathrm{CH}-\mathrm{COOH}$ is reduced with $\mathrm{LiAlH}_4$, the compound obtained will be
During dehydration of alcohols to alkenes by heating with conc. $\mathrm{H}_2 \mathrm{SO}_4$ the initiation step is
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 reaction of chloroform with alcoholic $\mathrm{KOH}$ and p-toluidine forms
The IUPAC name of $\mathrm{CH}_3 \mathrm{COCH}\left(\mathrm{CH}_3\right)_2$ is
Butene- 1 may be converted to butane by reaction with
The functional group, which is found in amino acid is
$\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{COOH} \underset{\text { red P }}{\stackrel{\mathrm{Cl}_2}{\longrightarrow}} \mathrm{A} \stackrel{\text { alc. } \mathrm{KOH}}{\longrightarrow} \mathrm{B}$. What is $\mathrm{B}$ ?
Which of the following does not show geometrical isomerism?
Which of these will not react with acetylene ?
Racemic mixture is formed by mixing two
What is the product when acetylene reacts with hypochlorous acid ?
On vigorous oxidation by permanganate solution $$ \left(\mathrm{CH}_3\right)_2 \mathrm{C}=\mathrm{CH}-\mathrm{CH}_2-\mathrm{CHO} \text { gives } $$
RNA is different from DNA because RNA contains