JEE Main Chemistry — Organic Chemistry previous year questions with solutions.
In both DNA and RNA, heterocyclic base and phosphate ester linkages are at-
Which types of isomerism is shown by 2,3-dichlorobutane?
p-cresol reacts with chloroform in alkaline medium to give the compound A which adds hydrogen cyanide to form, the compound B. The latter on acidic hydrolysis gives chiral carboxylic acid. The structure of the carboxylic acid is
Reaction of one molecule of $\mathrm{HBr}$ with one molecule of 1,3 -butadiene at $40^{\circ} \mathrm{C}$ gives predominantly
Of the five isomeric hexanes, the isomer which can give two monochlorinated compounds is
The IUPAC name of the compound 
Which of the following undergoes reaction with $50 \%$ sodium hydroxide solution to give the corresponding alcohol and acid?
On mixing ethyl acetate with aqueous sodium chloride, the composition of the resultant solution is
For which of the following parameters the structural isomers $\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}$ and $\mathrm{CH}_3 \mathrm{OCH}_3$ would be expected to have the same values? (Assume ideal behaviour)
Which base is present in RNA but not in DNA?
Rate of the reaction 
Which of the following compound is not chiral?
Among the following compound which can be dehydrated very easily is
The compound formed on heating chlorobenzene with chloral in the presence concentrated sulphuric acid is
Which one of the following reduced with zinc and hydrochloric acid to give the corresponding hydrocarbon?
Which of the following is the strongest base?
Amongst the following compound, the optically active alkane having lowest molecular mass is
The ammonia evolved from the treatment of $0.30 \mathrm{~g}$ of an organic compound for the estimation of nitrogen was passed in $100 \mathrm{~mL}$ of $0.1 \mathrm{M}$ sulphuric acid. The excess of acid required $20 \mathrm{~mL}$ of $0.5 \mathrm{M}$ sodium hydroxide solution hydroxide solutio for complete neutralization. The organic compound is
Which of the following will have meso-isomer also?
Which one of the following has the minimum boiling point?
Consider the acidity of the carboxylic acids:
Which one of the following statements is false?
Acetyl bromide reacts with excess of $\mathrm{CH}_3 \mathrm{Mgl}$ followed by treatment with a saturated solution of $\mathrm{NH}_4 \mathrm{Cl}$ given
The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic compound is