JEE Main Chemistry — Organic Chemistry previous year questions with solutions.
The presence or absence of hydroxyl group on which carbon atom of sugar differentiates RNA and DNA ?
Silver Mirror test is given by which one of the following compounds ?
Phenol is heated with a solution of mixture of $\mathrm{KBr}$ and $\mathrm{KBrO}_3$. The major product obtained in the above reaction is
From amongst the following alcohols the one that would react fastest with conc. $\mathrm{HCl}$ and anhydrous $\mathrm{ZnCl}_2$, is
The correct order of increasing basicity of the given conjugate bases $\left(\mathrm{R}=\mathrm{CH}_3\right)$ is
$29.5 \mathrm{mg}$ of an organic compound containing nitrogen was digested according to Kjeldahl's method and the evolved ammonia was absorbed in $20 \mathrm{~mL}$ of $0.1 \mathrm{M} \mathrm{HCl}$ solution. The excess of the acid required $15 \mathrm{~mL}$ of $0.1 \mathrm{M} \mathrm{NaOH}$ solution for complete neutralization. The percentage of nitrogen in the compound is
Biuret test is not given by
The main product of the following reaction is $\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{CH}(\mathrm{OH}) \mathrm{CH}\left(\mathrm{CH}_3\right)_2 \stackrel{\text { conc. } \mathrm{H}_2 \mathrm{SO}_4}{\longrightarrow}$ ?
One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of $44 \mathrm{u}$. The alkene is
Out of the following, the alkene that exhibits optical isomerism is
In the chemical reactions,  the compounds ' $\mathrm{A}$ ' and ' $\mathrm{B}$ ' respectively are
Consider the following bromides :  The correct order of $\mathrm{S}_{\mathrm{N}} 1$ reactivity is
Arrange the carbanions, $\left(\mathrm{CH}_3\right)_3 \overline{\mathrm{C}}, \overline{\mathrm{C}} \mathrm{Cl}_3,\left(\mathrm{CH}_3\right)_2 \overline{\mathrm{C}} \mathrm{H}, \mathrm{C}_6 \mathrm{H}_5 \overline{\mathrm{C}} \mathrm{H}_2$, in order of their decreasing stability :
The IUPAC name of neopentane is
The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is :
The two functional groups present in a typical carbohydrate are :
The number of stereoisomers possible for a compound of the molecular formula $\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}(\mathrm{OH})-\mathrm{Me}$ is :
Which of the following on heating with aqueous $\mathrm{KOH}$, produces acetaldehyde ?
The alkene that exhibits geometrical isomerism is:
A liquid was mixed with ethanol and a drop of concentrated $\mathrm{H}_2 \mathrm{SO}_4$ was added. A compound with a fruity smell was formed. The liquid was:
In Cannizzaro reaction qiven below 
The treatment of $\mathrm{CH}_3 \mathrm{MgX}$ with $\mathrm{CH}_3 \mathrm{C} \equiv \mathrm{C}-\mathrm{H}$ produces
The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is
Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and then heated with cuprous bromide. The reaction mixture so formed contains