Skip to main content

Consider the following reactions: (a) (CH_3)_3CCH(OH)CH_3oversetconc.H_2SO_4 → (b) (CH_3)_2CHCH(Br)CH_3oversetalc.KOH → (c)…

JEE Main 2020 — Chemistry Organic Chemistry

2020mcqmedium

Consider the following reactions:

(a)(a)(a) (CH3)3CCH(OH)CH3→conc.H2SO4{(C{H}_{3})}_{3}CCH(OH)C{H}_{3}\overset{conc.{H}_{2}S{O}_{4}}{\rightarrow }(CH3​)3​CCH(OH)CH3​→conc.H2​SO4​

(b)(b)(b) (CH3)2CHCH(Br)CH3→alc.KOH{(C{H}_{3})}_{2}CHCH(Br)C{H}_{3}\overset{alc.KOH}{\rightarrow }(CH3​)2​CHCH(Br)CH3​→alc.KOH

(c)(c)(c) (CH3)2CHCH(Br)CH3→(CH3)3O⊖K⊕{(C{H}_{3})}_{2}CHCH(Br)C{H}_{3}\overset{{(C{H}_{3})}_{3}{O}^{\ominus }{K}^{\oplus }}{\rightarrow }(CH3​)2​CHCH(Br)CH3​→(CH3​)3​O⊖K⊕

(d)(d)(d) JEE Main 2020 Chemistry, Hydrocarbons — question figure

Which of the reaction(s) will not produce Saytzeff product?

Official previous-year question

Held on 7 Jan 2020 · Verified 6 Jul 2026.

Options

  1. A

    (a),(c)(a),(c)(a),(c) and (d)(d)(d)

  2. B

    (d)(d)(d) only

  3. C

    (c)(c)(c) only

  4. D

    (b)(b)(b) and (d)(d)(d)

Did you get this right?

Sign in to track your attempts and accuracy.

Your note

Sign in to keep a private note on this question. Nothing you write is ever public.

JEE Main Organic Chemistry in other years

Organic Chemistry 2026Organic Chemistry 2025Organic Chemistry 2024Organic Chemistry 2023Organic Chemistry 2022Organic Chemistry 2021Organic Chemistry 2019Organic Chemistry 2018Organic Chemistry 2017Organic Chemistry 2016Organic Chemistry 2015Organic Chemistry 2014

More JEE Main Organic Chemistry questions

The correct order of the rate of reaction of the following reactants with nucleophile by SN1 mechanism is: (Given : Structure I and II are rigid) ![JEE Main 2026 Chemistry, Haloalkanes and Haloarenes — question figure](https://prepforbharat.s3.ap-south-1.amazonaws.com/exam/615f0e999476412f48314daf/Chemistry/images/Haloalkanes_and_Haloarenes/6983c1898bfdbb24356395f9/question_1__q_6983c1898bfdbb24356395f9__cdn-question-pool.getmarks.app__22S1_q_51_1_v2__8e0f5cc36d_final_ppt_sync.png)

2026medium

Identify the incorrect statements. ![JEE Main 2026 Chemistry, Amines — question figure](https://prepforbharat.s3.ap-south-1.amazonaws.com/exam/615f0e999476412f48314daf/Chemistry/images/Amines/69d8073681239f6567c4f314/question_1__q_69d8073681239f6567c4f314__cdn-question-pool.getmarks.app__05APRS1__q68_d1__28405a0f94_final_ppt_sync.png) Choose the correct answer from the options given below:

2026hard

For the following Friedel Craft's alkylation reaction, which of the statements are correct? ![JEE Main 2026 Chemistry, Hydrocarbons — question figure](https://prepforbharat.s3.ap-south-1.amazonaws.com/exam/615f0e999476412f48314daf/Chemistry/images/Hydrocarbons/69d8073581239f6567c4f311/question_1__q_69d8073581239f6567c4f311__cdn-question-pool.getmarks.app__05APRS1__q65_d1__31f270d2bb_final_ppt_sync.png) A. Major product is n-propyl benzene. B. iso-propyl carbocation intermediate is also generated. C. Multiple substitution is inevitable. D. Introducing electron-donating substituent on benzene will not produce any alkyl benzene. Choose the correct answer from the options given below:

2026medium

Match the LIST-I with LIST-II <table class="pyq-table"><tbody><tr><th>List-I (Reaction)</th><th>List-II (Mechanism)</th></tr><tr><td>A. Williamson Synthesis</td><td>I. Electrophilic addition</td></tr><tr><td>B. Friedel Craft Reaction</td><td>II. Free radical substitution</td></tr><tr><td>C. Bromination of vinyl benzene</td><td>III. Nucleophilic substitution</td></tr><tr><td>D. Chlorination of toluene in light</td><td>IV. Electrophilic substitution</td></tr></tbody></table> Choose the correct answer from the options given below:

2026medium

Consider the following reactions sequence ![JEE Main 2026 Chemistry, Amines — question figure](https://prepforbharat.s3.ap-south-1.amazonaws.com/exam/615f0e999476412f48314daf/Chemistry/images/Amines/69d8073081239f6567c4f2d0/question_1__q_69d8073081239f6567c4f2d0__cdn-question-pool.getmarks.app__02APRS2__q75_d1__25b338ebb6_final_ppt_sync.png) When the product (P) is subjected to Carius analysis using $AgNO_3$, $1.0$ g of the product (P) will produce _______ g of the precipitate of AgBr. (Nearest Integer) (Given: molar mass in g mol$^{-1}$ C : 12, H : 1, O : 16, N : 14, Br : 80, Ag : 108)

2026hard
View all Organic Chemistry questions

Other Chemistry topics for JEE Main

Physical Chemistry

1826 questions

Inorganic Chemistry

1476 questions

Keep practicing Organic Chemistry

Work through every JEE Main Organic Chemistry PYQ, year by year.

Browse all Chemistry topics