JEE Main Chemistry — Organic Chemistry previous year questions with solutions.
The final product A, formed in the following reaction sequence is: 
In Kjeldahl's method for estimation of nitrogen, ${\mathrm{CuSO}}_{4}$ acts as :
A species having carbon with sextet of electrons and can act as electrophile is called
The technique used for purification of steam volatile water immiscible substance is:
If one strand of a $\mathrm{DNA}$ has the sequence ATGCTTCA, sequence of the bases in complementary strand is:
Match List - I with List - II.  Choose the correct answer from the options given below :
The correct nomenclature for the following compound is : 
Given below are two statements: Statement (I) : Aminobenzene and aniline are same organic compounds. Statement (II) : Aminobenzene and aniline are different organic compounds. In the light of the above statements, choose the most appropriate answer from the options given below:
Total number of compounds with Chiral carbon atoms from following is  ${\mathrm{CH}}_{3}-{\mathrm{CH}}_{2}-\mathrm{CH}({\mathrm{NO}}_{2})-\mathrm{COOH}$ ${\mathrm{CH}}_{3}-\mathrm{CH}(I)-{\mathrm{CH}}_{2}-{\mathrm{NO}}_{2}$ ${\mathrm{CH}}_{3}-{\mathrm{CH}}_{2}-\mathrm{CHBr}-{\mathrm{CH}}_{2}-{\mathrm{CH}}_{3}$ ${\mathrm{CH}}_{3}-{\mathrm{CH}}_{2}-\mathrm{CH}(\mathrm{OH})-{\mathrm{CH}}_{2}\mathrm{OH}$ 
The functional group that shows negative resonance effect is:
Total number of deactivating groups in aromatic electrophilic substitution reaction among the following is 
In the following sequence of reaction, the major products \(B\) and \(C\) respectively are : 
$3-$Methylhex-2-ene on reaction with $\mathrm{HBr}$ in presence of peroxide forms an addition product (A). The number of possible stereoisomers for ' $A$ ' is ________.
Alkyl halide is converted into alkyl isocyanide by reaction with
Which of the following nitrogen containing compound does not give Lassaigne's test?
Given below are two statements : Statement (I) : p-nitrophenol is more acidic than m-nitrophenol and o-nitrophenol. Statement (II) : Ethanol will give immediate turbidity with Lucas reagent. In the light of the above statements, choose the correct answer from the options given below :
On a thin layer chromatographic plate, an organic compound moved by $3.5\mathrm{cm}$, while the solvent moved by $5\mathrm{cm}$. The retardation factor of the organic compound is _____________$\times {10}^{-1}$
The compound formed by the reaction of ethanal with semicarbazide contains _______ number of nitrogen atoms.
m-chlorobenzaldehyde on treatment with $50%$$\mathrm{KOH}$ solution yields
Identify \(A\) and \(B\) in the given chemical reaction sequence : 
Number of optical isomers possible for $2$ – chlorobutane ........
Given below are two statements : Statement (I) : All the following compounds react with p-toluenesulfonyl chloride. \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2 \quad\left(\mathrm{C}_6 \mathrm{H}_5\right)_2 \mathrm{NH} \quad\left(\mathrm{C}_6 \mathrm{H}_5\right)_3 \mathrm{~N}\) Statement (II) : Their products in the above reaction are soluble is aqueous \(\mathrm{NaOH}\). In the light of the above statements, choose the correct answer from the options given below
Match List - I with List - II. \(\begin{array}{|c|c|c|c|} \hline & \text { (Test) } & & \text { (Identification) } \\ \hline \text { (A) } & \text { Bayer's test MARKS } & \text { (I) } & \text { Phenol VIARKS } \\ \hline \text { (B) } & \text { Ceric ammonium nitrate test } & \text { (II) } & \text { Aldehyde } \\ \hline \text { (C) } & \text { Phthalein dye test } R \mathrm{~K} & \text { (III) } & \text { Alcoholic-OH group } \\ \hline \text { (D) } & \text { Schiff's test } & \text { (IV) } & \text { Unsaturation } \\ \hline \end{array}\) Choose the correct answer from the options given below :
Identify product A and product B 