JEE Main Chemistry — Organic Chemistry previous year questions with solutions.
Which of the following is least basic?
Which of the following reaction DOES NOT involve Hoffmann Bromamide degradation ?
Ceric ammonium nitrate and ${\mathrm{CHCl}}_{3}/\mathrm{alc}$. $\mathrm{KOH}$ are used for the identification of functional groups present in _ and _ respectively.
The total number of amines among the following which can be synthesized by Gabriel synthesis is ________.
A peptide synthesized by the reactions of one molecule each of Glycine, Leucine, Aspartic acid and Histidine will have _____ peptide linkages.
Out of following isomeric forms of uracil, which one is present in RNA?
Thiamine and pyridoxine are also known respectively as:
Fructose is an example of :-
The secondary structure of protein is stabilised by:
Match List-$I$ with List-$\mathrm{II}$. <table class="pyq-table"><tbody><tr><td colspan="2" rowspan="1">List-$I$</td><td colspan="2" rowspan="1">List-$\mathrm{II}$</td></tr><tr><td>(a)</td><td>Sucrose</td><td>(i)</td><td>$\beta -D-$Galactose and $\beta -D-$Glucose</td></tr><tr><td>(b)</td><td>Lactose</td><td>(ii)</td><td>$\alpha -D-$Glucose and $\beta -D-$Fructose</td></tr><tr><td>(c)</td><td>Maltose</td><td>(iii)</td><td>$\alpha -D-$Glucose and $\alpha -D-$Glucose</td></tr></tbody></table>Choose the correct answer from the options given below:
Out of the following, which type of interaction is responsible for the stabilisation of $\alpha -$helix structure of proteins?
Which of the following vitamin is helpful in the blood clotting?
Which of the following is an aromatic compound?
Which of the following reaction is an example of ammonolysis?
Which of the following is correct structure of tyrosine?
 The product "$A$" and "$B$" formed in above reactions are
In $\overset{1}{C}{H}_{2}=\overset{2}{C}=\overset{3}{C}H-\overset{4}{C}{H}_{3}$ molecule, the hybridization of carbon $1,2,3$ and $4$ respectively, are :
Presence of which reagent will affect the reversibility of the following reaction, and change it to a irreversible reaction : $C{H}_{4}+{I}_{2}\rightleftharpoons _{\mathrm{Reversible}}^{\mathrm{hv}}{\mathrm{CH}}_{3}-I+\mathrm{HI}$
Given below are two statements : $\mathrm{Statement}I:$ Aniline is less basic than acetamide. $\mathrm{Statement}\mathrm{II}:$ In aniline, the lone pair of electrons on nitrogen atom is delocalised over benzene ring due to resonance and hence less available to a proton. Choose the most appropriate option ;
The number of stereoisomers possible for $1,2$ -dimethyl cyclopropane is:
Which one of the following reactions will not yield propanoic acid?
Which one of the following reactions will not form acetaldehyde?
A. Phenyl methanamine B. $N,N$-Dimethylaniline C. $N$-Methyl aniline D. Benzenamine Choose the correct order of basic nature of the above amines.
 Consider the above reaction, the product $X$ and $Y$ respectively are :