JEE Main Chemistry — Organic Chemistry previous year questions with solutions.
Chlorobenzne reacts with trichloro acetaldehyde in the presence of $\mathrm{H}_2 \mathrm{SO}_4$.  The major product formed is:
For the compounds CH$_{3}$Cl, CH$_{3}$Br, CH$_{3}$I and CH$_{3}$F, the correct order of increasing C-halogen bond length is :
Conversion of benzene diazonium chloride to chlorobenzene is an example of which of the following reactions?
The major product obtained in the photo catalysed bromination of 2-methylbutane is:
In the reaction, ${\text{CH}}_{3} \text{COOH} \overset{{\text{LiAlH}}_{4}}{\rightarrow } \text{A} \overset{{\text{PCl}}_{5}}{\rightarrow } \text{B} \overset{\text{Alc. KOH}}{\rightarrow } \text{C}$, the product C is :
The final product formed when methylamine is treated with ${ \text{NaNO}}_{\text{2}}$ and $\text{HCl}$ followed by hydrolysis is:
The reagent needed for converting 
Which one of the following statements is not correct?
 on mercuration-demercuration produces the major product:
For the estimation of nitrogen, $1.4g$ of an organic compound was digested by the Kjeldahl method and the evolved ammonia was absorbed in $60\mathrm{ml}$ of $\frac{ \text{M} }{ 1 0 }$ sulphuric acid. The unreacted acid required $20\mathrm{ml}$ of $\frac{ \text{M} }{ 1 0 }$ sodium hydroxide for complete neutralization. The percentage of nitrogen in the compound is
In the Victor-Meyer's test, the colour given by $1^{\circ}, 2^{\circ}$ and $3^{\circ}$ alcohols are respectively:
Tischenko reaction is a modification of:
Williamson synthesis of ether is an example of :
The reason for double helical structure of DNA is the operation of :
Which is the major product formed when acetone is heated with iodine and potassium hydroxide?
A compound with molecular mass $180$ is acylated with ${\mathrm{CH}}_{3}\mathrm{COCl}$ to get a compound with molecular mass $390$. The number of amino groups presents per molecule of the former compound is
A solution of $(-)1-\mathrm{chloro}-1-\mathrm{phenylethane}$ in toluene racemises slowly in the presence of a small amount of SbCl$_{5}$, due to the formation of :
The order of reactivity of the given haloalkanes towards nucleophile is :
Arrange the following compounds in order of decreasing acidity : 
An organic compound A upon reacting with ${\mathrm{NH}}_{3}$$_{ }$gives B. On heating, B gives C. C in presence of KOH reacts with Br$_{2}$ to give CH$_{3}$CH$_{2}$NH$_{2}$. A is :
Rate of dehydration of alcohols follows the order:
The addition of $\mathrm{HI}$ in the presence of peroxide catalyst does not follow anti-Markovnikov's rule because :
An ether (A), $\mathrm{C}_5 \mathrm{H}_{12} \mathrm{O}$, when heated with excess of hot concentrated $\mathrm{HI}$ produced two alkyl halides which when treated with $\mathrm{NaOH}$ yielded compounds (B) and (C). Oxidation of (B) and (C) gave a propanone and an ethanoic acid respectively. The IUPAC name of the ether (A) is :
The reaction of phenol with benzoyl chloride to give phenyl benzoate is known as :