JEE Main Chemistry — Organic Chemistry previous year questions with solutions.
Choose the halogen which is most reactive towards SN1 reaction in the given compounds (A, B, C & D) A.  B.  C.  D. 
For the reaction ${\mathrm{RCH}}_{2}\mathrm{Br}+{I}^{-}\overset{\text{ Acetone }}{\longrightarrow }\underset{\text{ major }}{{\mathrm{RCH}}_{2}I}+{\mathrm{Br}}^{-}$ The correct statement is
Identify the incorrect option from the following:
Match List I with List II <table class="pyq-table"><tbody><tr><td colspan="2" rowspan="1">List I</td><td colspan="2" rowspan="1">List II</td></tr><tr><td>A</td><td><img src="https://prepforbharat.s3.ap-south-1.amazonaws.com/exam/615f0e999476412f48314daf/Chemistry/images/Haloalkanes_and_Haloarenes/648b5a6f417cc3fb48d681e0/question_1__q_648b5a6f417cc3fb48d681e0__cdn-question-pool.getmarks.app__0330938c-4009-4fcf-abce-975bc19ab9bf-9895888_A__d7deb547ef_final_ppt_sync.png" alt="JEE Main 2023 Chemistry, Haloalkanes and Haloarenes — question figure 1"></td><td>I</td><td>Fittig reaction</td></tr><tr><td>B</td><td><img src="https://prepforbharat.s3.ap-south-1.amazonaws.com/exam/615f0e999476412f48314daf/Chemistry/images/Haloalkanes_and_Haloarenes/648b5a6f417cc3fb48d681e0/question_2__q_648b5a6f417cc3fb48d681e0__cdn-question-pool.getmarks.app__92db8cc8-1059-496b-a315-7fdb7fb6f3d6-9895888_B__40dfbebf2c_final_ppt_sync.png" alt="JEE Main 2023 Chemistry, Haloalkanes and Haloarenes — question figure 2"></td><td>II</td><td>Wurtz Fittig reaction</td></tr><tr><td>C</td><td><img src="https://prepforbharat.s3.ap-south-1.amazonaws.com/exam/615f0e999476412f48314daf/Chemistry/images/Haloalkanes_and_Haloarenes/648b5a6f417cc3fb48d681e0/question_3__q_648b5a6f417cc3fb48d681e0__cdn-question-pool.getmarks.app__0624c322-bc4b-4992-97ec-168d19f0034c-9895888_C__2a80acb97b_final_ppt_sync.png" alt="JEE Main 2023 Chemistry, Haloalkanes and Haloarenes — question figure 3"></td><td>III</td><td>Finkelstein reaction</td></tr><tr><td>D</td><td>${C}_{2}{H}_{5}\mathrm{Cl}+\mathrm{NaI}\rightarrow {C}_{2}{H}_{5}I+\mathrm{Nacl}$</td><td>IV</td><td>Sandmeyer reaction</td></tr></tbody></table>
In the following given reaction '$A$' is 
In the following reaction 
Suitable reaction condition for preparation of Methyl phenyl ether is
Number of compounds from the following which will not dissolve in cold ${\mathrm{NaHCO}}_{3}$ and $\mathrm{NaOH}$ solutions but will dissolve in hot $\mathrm{NaOH}$ solution is _____ . 
Decreasing order of dehydration of the following alcohols is 
Find out the major product from the following reaction. 
Find out the major product for the following reaction 
 The value of $x$ in compound ‘$D$’ is _____
 The ratio x/y on completion of the above reaction is ______ .
Among the following the number of compounds which will give positive iodoform reaction is _____. (a) $1$-Phenylbutan-$2$-one (b) $2$-Methylbutan-$2$-ol (c) $3$-Methylbutan-$2$-ol (d) $1$-Phenylethanol (e) $3,3$-dimethylbutan-$2$-one (f) $1$-Phenylpropan-$2$-ol
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R: Assertion A: Acetal/Ketal is stable in basic medium. Reason R: The high leaving tendency of alkoxide ion gives the stability to acetal/ketal in basic medium. In the light of the above statements, choose the correct answer from the options given below:
A trisubstituted compound '$A$', ${C}_{10}{H}_{12}{O}_{2}$ gives neutral ${\mathrm{FeCl}}_{3}$ test positive. Treatment of compound '$A$' with $\mathrm{NaOH}$ and ${\mathrm{CH}}_{3}\mathrm{Br}$ gives ${C}_{11}{H}_{14}{O}_{2}$, with hydroiodic acid gives methyl iodide and with hot conc. $\mathrm{NaOH}$ gives a compound $B$, ${C}_{10}{H}_{12}{O}_{2}$. Compound '$A$' also decolorises alkaline ${\mathrm{KMnO}}_{4}$. The number of $\pi$ bond/s present in the compound '$A$' is _____ .
 In the above conversion the correct sequence of reagents to be added is
Consider the following sequence of reactions  The product ‘$B$’ is
Compound A from the following reaction sequence is : 
The product $(P)$ formed from the following multistep reaction is: 
The major products A and B from the following reactions are : 
An organic compound $[A]({C}_{4}{H}_{11}N)$, shows optical activity and gives ${N}_{2}$ gas on treatment with ${\mathrm{HNO}}_{2}$. The compound $[A]$ reacts with ${\mathrm{PhSO}}_{2}\mathrm{Cl}$ producing a compound which is soluble in $\mathrm{KOH}$. The structure of $A$ is :
Match List I with List II <table class="pyq-table"><tbody><tr><td colspan="2" rowspan="1">List I (Amines)</td><td colspan="2" rowspan="1">List II $(\mathrm{pKb})$</td></tr><tr><td>A.</td><td>Aniline</td><td>I.</td><td>$3.25$</td></tr><tr><td>B.</td><td>Ethanamine</td><td>II.</td><td>$3.00$</td></tr><tr><td>C.</td><td>N-Ethylethanamine</td><td>III.</td><td>$9.38$</td></tr><tr><td>D.</td><td>N, N-Diethylethanamine</td><td>IV.</td><td>$3.29$</td></tr></tbody></table>Choose the correct answer from the options given below:-
The correct order in aqueous medium of basic strength in case of methyl substituted amines is: