Chemistry Organic Chemistry questions from JEE Main 2019.
The major product of the following reaction is : 
The products formed in the reaction of cumene with ${O}_{2}$ followed by treatment with dil $\mathrm{HCl}$ are:
The correct match between Item I and Item II is: 
Which of the following compounds will show the maximum 'enol' content?
Which is the most suitable reagent for the following transformation?  
The major product formed in the reaction given below will be : 
What will be the major product in the following mononitration reaction? 
Which of the following compounds reacts with ethylmagnesium bromide and also decolourizes bromine water solution?
An organic compound neither reacts with neutral ferric chloride solution nor with Fehling solution. It however, reacts with Grignard reagent and given positive iodoform test. The compound is:
Which one of the following is likely to give a precipitate with $AgN{O}_{3}$ solution?
The increasing order of the reactivity of the following with $\text{L}\text{i}\text{A}\text{l}{\text{H}}_{4}$ is: $(A)$  $(B)$  $(C)$  $(D)$ 
The correct IUPAC name of the following compound is: 
The increasing order of reactivity of the following compounds towards aromatic electrophilic substitution reaction is: 
The major product (s) obtained in the following reaction is/are: 
The increasing order of the ${pK}_{b}$ of the following compund is: $(A)$  $(B)$  $(C)$  $(D)$ 
But-2-ene on reaction with alkaline $KMn{O}_{4}$ at elevated temperature followed by acidification will give:
The correct order for acid strength of compounds $\mathrm{CH}\equiv \mathrm{CH}, {\mathrm{CH}}_{3}-C\equiv \mathrm{CH}$ and ${\mathrm{CH}}_{2}={\mathrm{CH}}_{2}$ is as follows:
Which amongst the following is the strongest acid?
Which of the following potential energy $(P.E.)$ diagrams represents the ${\mathrm{SN}}_{1}$ reaction?
The major product of the following reaction is: 
In the following skew conformation of ethane, ${H}^{'}-C-C-{H}^{''}$ dihedral angle is: 
The increasing order of the reactivity of the following compounds towards electrophilic aromatic substitution reactions is: 
The major product formed in the following reaction is: 
The major product of the following reaction is: 
The major product of the following reaction is: 
The major product of the following reaction is: 
Number of stereo centers present in linear and cyclic structures of glucose are respectively:
Which of these factors does not govern the stability of a conformation in acyclic compounds?
Major products of the following reaction are: 
The major product obtained in the following reaction is: 
The major product of the following reaction is: 
The major product obtained in the given reaction is: 
The major product of the following reaction is: 
The major product of the following reaction is: 
The major product of the following reaction is: 
Which hydrogen in compound $(E)$ is easily replaceable during bromination reaction in presence of light ? 
In the following reaction $\mathrm{Aldehyde}+\mathrm{Alcohol}\overset{\mathrm{HCl}}{\rightarrow }\mathrm{Acetal}$<table class="pyq-table"><tbody><tr><td>$Aldehyde$</td><td>$Alcohol$</td></tr><tr><td>$\mathrm{HCHO}$</td><td>$t-\mathrm{BuOH}$</td></tr><tr><td>${\mathrm{CH}}_{3}\mathrm{CHO}$</td><td>$\mathrm{MeOH}$</td></tr></tbody></table>The best combination is:
The correct match between item $I$ and item $\mathrm{II}$ is <table class="pyq-table"><tbody><tr><td colspan="2">Item $I$ (Compound)</td><td colspan="2">Item $\mathrm{II}$ (Reagent)</td></tr><tr><td>$a.$</td><td>Lysine</td><td>$p.$</td><td>$1-$naphthol</td></tr><tr><td>$b.$</td><td>Furfural</td><td>$q.$</td><td>Ninhydrin</td></tr><tr><td>$c.$</td><td>Benzyl alcohol</td><td>$r.$</td><td>${\mathrm{KMnO}}_{4}$</td></tr><tr><td>$d.$</td><td>Styrene</td><td>$s.$</td><td>Ceric ammonium nitrate</td></tr></tbody></table>
The major product of the following reaction is: 
The major product of the following reaction is: 
The $IUPAC$ name of the following compound is: 
The major product of the following reaction is: 
Consider the following reactions:  ‘A’ is:
The major product of the following reaction is: 
Which of the following compounds will produce a precipitate with $\mathrm{AgNO}_{3} ?$
The major product obtained in the following reaction is: 
The major product of the following reaction is: 
Arrange the following amines in the decreasing order of basicity. 
The principle of column chromatography is:
The major product of the following reaction is 
The major product of the following reaction is: 
The major product $Y$ in the following reaction is: 
Coupling of benzene diazonium chloride with $1-naphthol$ in alkaline medium will give:
In the following compounds, the decreasing order of basic strength will be:
The correct structure of histidine in a strongly acidic solution $(\mathrm{pH}=2)$ is
The major products $A$ and $B$ for the following reactions are, respectively: 
The major product of the following reaction is: 
An organic compound $‘X’$ showing the following solubility profile is: 
The major product of the following reaction is 
The correct structure of the product $‘P’$ in the following reaction is $\mathrm{Asn}-\mathrm{Ser}+\underset{(\mathrm{excess})}{{({\mathrm{CH}}_{3}\mathrm{CO})}_{2}O}\overset{{\mathrm{NEt}}_{3}}{\rightarrow }P$
The major product of the following reaction is:  
Which compound (s) out of the following is/are not aromatic? (A) (B) (C) (D)
The major product obtained in the following reaction is: 
The major product of the following reaction is: 
The major product of the following reaction is:
The major product of the following reaction is 
Amylopectin is composed of:
Which one of the following alkenes when treated with $HCl$ yields majorly an anti Markovnikov product?
The major product of the following reaction is: 
An organic compound is estimated through Dumas method and was found to evolve 6 moles of $\mathrm{CO}_{2}, 4$ moles of $\mathrm{H}_{2} \mathrm{O}$ and 1 mole of nitrogen gas. The formula of the compound is:
An aromatic compound $'A'$ having molecular formula ${C}_{7}{H}_{6}{O}_{2}$, on treating with aqueous ammonia and heating forms compound $'B'$. The compound $'B'$ on reaction with molecular bromine and potassium hydroxide provides compound $'C'$ having molecular formula ${C}_{6}{H}_{7}N$. The structure of $'A'$ is:
The compounds $A$ and $B$ in the following reaction are, respectively: 
The major product of the following reaction is 
Among the following compounds most basic amino acid is:
The major product of the following reaction is:
The IUPAC name for the following compound is: 
Increasing order of reactivity of the following compounds for ${S}_{N}1$ substitution is: 
The major product obtained in the following conversion is: 
The major product in the following conversion is 
In chromatography, which of the following statements is incorrect for ${R}_{f}$?
What will be the major product when m-cresol is reacted with propargyl bromide $(HC\equiv C-C{H}_{2}Br)$ in presence of ${K}_{2}C{O}_{3}$ in acetone?
The major products of the following reaction are: 
The organic compound that gives following qualitative analysis is:<table class="pyq-table"><tbody><tr><th></th><th>Test</th><th>Inference</th></tr><tr><td>$(a)$</td><td>$Dil.HCl$</td><td>Insoluble</td></tr><tr><td>$(b)$</td><td>$NaOH solution$</td><td>Soluble</td></tr><tr><td>$(c)$</td><td>$B{r}_{2}/water$</td><td>Decolourization</td></tr></tbody></table>
p-Hydroxybenzophenone upon reaction with bromine in carbon tetrachloride gives:
Compound $A({C}_{9}{H}_{10}O)$ shows positive iodoform test. Oxidation of A with $KMn{O}_{4}/KOH$ gives acid $B({C}_{8}{H}_{6}{O}_{4})$ . Anhydride of B is used for the preparation of phenolphthalein. Compound A is:
The major product of the following reaction is: 
The major product of the following reaction is: 
With dehydrating agent present which dicarboxylic acid is least reactive towards forming an anhydride?
Acid strength given below the correct decreasing order will be :
Benzene diazonium chloride on reaction with aniline in the presence of dilute hydrochloric acid gives:
Which of the following is not a correct method of the preparation of benzyl amine from cyano benzene?
Aniline dissolved in dilute $HCl$ is reacted with sodium nitrite at $0^{\circ}C$. This solution was added dropwise to a solution containing an equimolar mixture of aniline and phenol in dilute $HCl$. The structure of the major product is
The major product in the following reaction is: 
Hinsberg’s reagent is:
The major product obtained in the following reaction is: 
The increasing order of reactivity of the following compounds towards reaction with alkyl halides directly is: $(i)$  $(ii)$  $(iii)$  $(iv)$ 
A compound 'X' on treatment with Br $/ \mathrm{NaOH}$, provided $\mathrm{C}_{3} \mathrm{H}_{9} \mathrm{~N},$ which gives positive carbylamine test. Compound $\mathrm{X}^{\prime}$ is:
Which of the given statements is incorrect about glycogen?
Glucose and Galactose are having identical configuration in all the positions except position.
The correct sequence of amino acids present in the tripeptide given below is: 
The major product obtained in the following reaction is: 
 cannot be prepared by:
The highest value of the calculated spin only magnetic moment (in $\mathrm{BM}$) among all the transition metal complexes is
Fructose and glucose can be distinguished by:
If Dichloromethane (DCM) and water ${\text{H}}_{2}\text{O}$ are used for differential extraction, which one of the following statements is correct?
The increasing order of $\mathrm{pKa}$ of the following amino acids in aqueous solution is Glycine, Aspartate, Lysine, Arginine.
The major product of the following reaction is 
The increasing basicity order of the following compounds is:    
Ethylamine $({C}_{2}{H}_{5}N{H}_{2})$ can be obtained from N-ethylphthalimide on treatment with:
The major product of the following addition reaction is 
The peptide that gives positive ceric ammonium nitrate and carbylamine tests is:
The correct match between items I and II is : 
Maltose on treatment with dilute $HCl$ gives:
The major product of the f following reaction is: 
Major product of the given reaction is: 
The aldehydes which will not form Grignard product with one equivalent of Grignard reagents are $(A)$  $(B)$  $(C)$  $(D)$ 
Which of the following amines can be prepared by Gabriel phthalimide reaction?
An ‘Assertion’ and a ‘Reason’ is given below. Choose the correct answer from the following options: Assertion $(A)$: Vinyl halides do not undergo nucleophilic substitution easily. Reason $(R)$: Even though the intermediate carbocation is stabilized by loosely held $\pi -$ electrons, the cleavage is difficult because of the strong bonding.
Which of the following compounds is not aromatic?
The increasing order of the $pKa$ values of the following compounds is: 
The decreasing order of ease of alkaline hydrolysis for the following esters is 
What is the IUPAC name of the following compound? 
The increasing order of nucleophilicity of the following nucleophiles is; 
The major product of the following reaction is: 
The major product $'Y'$ in the following reaction is: 
Increasing rate of ${S}_{N}1$ reaction in the following compounds is: (I) (II)  (III) (IV) 
The major product of the following reaction 
The major product of the following reaction is: 
Among the following compounds, which one is found in RNA?
Which of the following statements is not true about RNA?
In the following reactions, products $A$ and $B$ are:  
In the following compound,  the favourable site/s for protonation is/are :
The test performed on compound $x$ and their inferences are: <table class="pyq-table"><tbody><tr><td>Test</td><td>Inference</td></tr><tr><td>$(a)$ $2, 4$ - $DNP$ test</td><td>Coloured precipitate yellow</td></tr><tr><td>$(b)$ Iodoform test</td><td>Yellow precipitate</td></tr><tr><td>$(c)$ Azo-dye test</td><td>No dye formation</td></tr></tbody></table>Compound $'x'$ is:
The major product of the following reaction is: $C{H}_{3}CH=CHC{O}_{2}C{H}_{3}\overset{LiAl{H}_{4}}{\rightarrow }$
Among the following four aromatic compounds, which one will have the lowest melting point?
Heating of 2-chloro-1-phenylbutane with $EtOK/EtOH$ gives $X$ as the major product. Reaction $X$ with $Hg{(OAc)}_{2}/{H}_{2}O$ followed by $NaB{H}_{4}$ gives $Y$ as the major product. $Y$ is:
Which of the following statements is not true about sucrose?
Which of the following tests cannot be used for identifying amino acids?
In the following reaction carbonyl compound $+MeOH\overset{HCl}{\rightleftharpoons }acetal$ Rate of the reaction is the highest for:
The major product 'X' formed in the following reaction is: 
In the reaction given below what will be the major product at the end : 
Polysubstitution is a major drawback in: