Questions- All Important PYQs Organic Chemistry

GOC Q- Which among the following is the strongest Bronsted base? JEE Main 2022 A B C D Given below are two statements Statement I : Aniline is less basic than acetamide. Statement II : In aniline, the lone pair of electrons on nitrogen atom is delocalised over benzene ring due to resonance and hence less available to a proton Choose the most appropriate option JEE(MAIN) 2021 A Statement I is false but statement II is true. B Both statement I and statement II are false. C Statement I is true but statement II is false. D Both statement I and statement II are true. Q- Statement I : The presence of weaker π- bonds make alkenes less stable than alkanes. Statement II : The strength of the double bond is greater than that of carbon-carbon single bond. In the light of the above statements, choose the correct answer from the options given below. JEE Main 2022 A Both Statement I and Statement II are correct. B Both Statement I and Statement H are incorrect. C Statement I is correct but Statement II is incorrect. D Statement I is incorrect but Statement II is correct. Q- The correct order of nucleophilicity is JEE Main 2022 A B C D F- > OH- Q- Which of the following is most stable? JEE Main 2022 A B C D Q- Which of the following structures are aromatic in nature? JEE Main 2022 A A, B, C and D B Only A and B C Only A and C D Only B, C and D Which of the following is least basic? JEE(MAIN) 2021 A B C D Q- Which of the following carbocations is most stable : JEE Main 2022 A B C D Q- Arrange the following in decreasing acidic strength. JEE Main 2022 A A>B>C>D B B>A>C>D C D>C>A>B D D>C>B>A The increasing order of the acidity of the α-hydrogen of the following compounds is : JEE(MAIN) 2020 A (C) < (A) < (B) < (D) B (B) < (C) < (A) < (D) C (A) < (C) < (D) < (B) D (D) < (C) < (A) < (B) Q- Which of the following compounds is not aromatic? JEE Main 2022 A B C D Q- The correct stability order of the following diazonium salt is A (A) > (B) > (C) > (D) B (A) > (C) > (D) > (B) C (C) > (A) > (D) > (B) D (C) > (D) > (B) > (A) Q- Match List - I with List - II. Choose the correct answer from the options given below: A (A) - (II), (B) - (I), (C) - (IV), (D) - (III) B (A) - (IV), (B) - (III), (C) - (I), (D) - (II) C (A) - (III), (B) - (IV), (C) - (I), (D) - (II) D (A) - (IV), (B) - (III), (C) - (II), (D) - (I) A. Phenyl methanamine B. N,N-Dimethylaniline C. N-Methyl aniline D. Benzenamine Choose the correct order of basic nature of the above amines. JEE(MAIN) 2021 A A>C>B>D B D>B>C>A C D>C>B>A D A>B>C>D Q- Observe structures of the following compounds The total number of structures/compounds which possess asymmetric carbon atoms is ___. JEE Main 2022 Isomerism Q- Which one of the following pairs of isomers is an example of metamerism ? Jee Main 2021 A B C D Q- Which of the following molecules does not show stereoisomerism ? Jee Main 2021 A 3,4-Dimethylhex-3-ene B 3-Methylhex-1-ene C 3-Ethylhex-3-ene D 4-Methylhex-1-ene Q- Compound with molecular formula C3H6O can show : Jee Main 2021 A Positional isomerism B Both positional isomerism and metamerism C Metamerism D Functional group isomerism Q- Which of the following compound shows geometrical isomerism Jee Main 2020 A 2-methylpent-2-ene B 4-methylpent-l-ene C 4-methylpent-2-ene D 2-methylpent-l-ene Q- Assertion A : Enol form of acetone [CH3COCH3] exists in < 0.1% quantity. However, the enol form of acetyl acetone [CH3COCH2OCCH3] exists in approximately 15% quantity. Reason R : enol form of acetyl acetone is stabilized by intramolecular hydrogen bonding, which is not possible in enol form of acetone. Choose the correct statement : Jee Main 2021 A A is false but R is true B Both A and R are true and R is the correct explanation of A C Both A and R are true but R is not the correct explanation of A D A is true but R is false Q- Which will have the highest enol content? Jee Main 2022 A B C D Q- The number of stereoisomers possible for 1,2- dimethyl cyclopropane is : Jee Main 2021 A One B Four C Two D Three Q- Given below are two statements. In the light of the above statement, choose the most appropriate answer from the options given below. Jee Main 2022 A Both Statement I and Statement II are correct B Both Statement I and Statement II are incorrect C Statement I is correct but Statement II is incorrect D Statement I is incorrect but Statement II is correct Q- Which of the following compounds will show the maximum ‘enol’ content? Jee Main 2019 A CH3COCH3 B CH3COCH2CONH2 C CH3COCH2COCH3 D CH3COCH2COOC2H5 Q- 3-Methyl-pent-2-ene on reaction with HBr in presence of peroxide forms an addition product. The number of possible stereoisomers for the product is : Jee Main 2017 A 0 B 2 C 4 D 6 Q- The number of sp3 hybridised carbons in an acyclic neutral compound with molecular formula C4H5N is : Jee Main 2022 Q- Total number of isomers (including stereoisomers) obtain on monochlorination of methylcyclohexane is ___. Jee Main 2022 Q- Optical activity of an enantiomeric mixture is +12.6o and the specific rotation of (+) isomer is +30o. The optical purity is ___ % Jee Main 2022 Q- The number of chiral alcohol(s) with molecular formula C4H10O is __. Jee Main 2022 Q- Observations structures of the following compounds The total number of structures/compounds which posses asymmetric carbon atoms is ___. Jee Main 2022 Q- The number of chiral carbons in chloramphenicol is _______ . Jee Main 2020 Q- The number of acyclic structural isomers (including geometrical isomers) for pentene are ____ Jee Main 2021 Reaction Mechanism Q- In SN2 reactions, the correct order of reactivity for the following compounds: CH3Cl, CH3CH2Cl, (CH3)2CHCl and (CH3)3CCl is : JEE Main 2014 A CH3Cl > (CH3)2CHCl > CH3CH2Cl > (CH3)3CCl B CH3Cl > CH3CH2Cl > (CH3)2CHCl > (CH3)3CCl C CH3CH2Cl > CH3Cl > (CH3)2CHCl > (CH3)3CCl D (CH3)2CHCl > CH3CH2Cl > CH3Cl > (CH3)3CCl Q- The major product of the following reaction: JEE Main 2019 A B C D Q- LIST - I contains reactions and LIST-II contains major products. Match each reaction in LIST-I with one or more products in LIST-II and choose the correct option. JEE Adv 2018 A P → 1, 5 ; Q → 2 ; R → 3 ; S → 4 B P → 1, 4 ; Q → 2 ; R → 4 ; S → 3 C P → 1, 4 ; Q → 1, 2 ; R → 3,4 ; S → 4 D P → 4, 5 ; Q → 4 ; R → 4 ; S → 3, 4 Q- Most stable product of the following reaction is : JEE Main 2022 A B C D Q- The major product of the following reaction is : JEE Main 2019 A B C D Q- The major product in the given reaction is JEE Main 2022 A B C D Q- Compound ‘A’ undergoes following sequence of reactions to give compound ‘B’. The correct structure and chirality of compound ‘B’ is [where Et is -C2H5] JEE Main 2022 Compound ‘A’ A B C D Q- Match the chemical conversions in List I with the appropriate reagents in List II and select the correct answer using the code given below the lists : JEE Adv 2013 A P →2, Q → 3, R → 1, S → 4 C P →3, Q → 2, R → 1, S → 4 B P →2, Q → 3, R → 4, S → 1 D P →3, Q → 2, R → 4, S → 1 Q- The major product of the following reaction is : JEE (Mains)-2019 A B C D Q- The major product(s) obtained in the following reaction is/are JEE (Mains)-2019 A B C D Q- The increasing order of the reactivity of the following halides for the SN1 reaction is JEE (Mains)-2017 A (I) < (III) < (II) B (II) < (III) < (I) C (III) < (II) < (I) D (II) < (I) < (III) Q- 2-chloro-2-methylpentane on reaction with sodium methoxide in methanol yields: JEE (Mains)-2016 A (a) and (c) B (c) only C (a) and (b) D All of these Q- The major product of the following reaction: JEE Main 2019 A B C D Q- The major product of the following reaction is : JEE Main 2018 A B C D Q- The major product of the following reaction is : JEE Main 2019 A B C D Q- On treatment of the following compound with a strong acid, the most susceptible site for bond cleavage is : JEE Main 2018 A C1 - O 2 B O2 - C 3 C D C4 - O 5 O5 - C 6 Q- The major product of the following reaction: JEE Main 2017 A B C D Q- The major product of the following reaction is : JEE Main 2019 A B C D Q- Observe the following reaction sequence Calculate molecular mass [W] of product I and report your answer as N, where N = W ÷ 3. JEE Main 2019 Reagents Q- Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of : JEE Main 2011 A B two ethylenic double bonds a vinyl group C an isopropyl group D an acetylenic triple bond Q- Identify A in the given chemical reaction. JEE Main 2021 A B C D Q- Consider the following chemical reaction. The number of sp2 hybridized carbon atom (s) present in the product is ____. JEE Main 2021 Q- Considering the above reaction, the major product among the following is : JEE Main 2019 A B C D Q- Consider the above reaction and identify “Y”. A B -CH2NH -CHO C -COOH D -CONH2 JEE Main 2021 Q- In the given transformation, which the following is the most appropriate reagent ? JEE Main 2012 A B Zn–Hg/HCl C Na, Liq, NH3 D NaBH4 Q- The most suitable reagent for the conversion of R–CH2–OH R–CHO is : JEE Main 2014 A KMnO4 B K2Cr2O7 C CrO3 D PCC (Pyridinium Chlorochromate) Q- In the following sequence of reactions the P is : JEE (Main)-2021 A B C D Q- The correct sequence of reagents for the following conversion will be : JEE Main 2017 A CH3MgBr, H+/CH3OH, [Ag(NH3)2]+OH– B CH3MgBr, [Ag(NH3)2]+OH–, H+/CH3OH C [Ag(NH3)2]+OH–, CH3MgBr, H+/CH3OH D [Ag(NH3)2]+OH–, H+/CH3OH, CH3MgBr Q- The major product obtained in the following reaction is : JEE Main 2017 A B C D Q- The trans-alkenes are formed by the reduction of alkynes with : JEE Main 2018 A B Na/liq. NH3 Sn - HCl C H2–Pd/C, BaSO4 D NaBH4 Q- Bouveault-Blanc reduction reaction involves: JEE Main 2016 A Reduction of an anhydride with LiAlH4 B Reduction of an ester with Na/C2H5OH C Reduction of a carbonyl compound with Na/Hg and HCl D Reduction of an acyl halide with H2/Pd Q- The reagent(s) required for the following conversion are: JEE Main 2018 A (i) NaBH4 (ii) Raney Ni/H2 (iii) H3O+ B (i) LiAlH4 (ii) H3O+ C (i) B2H6 (ii) DIBAL-H (iii) H3O+ D (i) B2H6 (ii) SnCl2/HCl (iii) H3O+ Q- The major product ‘X’ formed in the following reaction is: JEE Main 2019 A B C D Q- The major product of the following reaction is: JEE Main 2019 A B C D Q- The major product of the following reaction is: JEE Main 2019 A B C D Q- Which is the most suitable reagent for the following transformation? JEE Main 2019 A I2/NaOH B Alkaline KMnO4 C Tollen’s reagent D CrO2Cl2/CS2 Q- Which one of the following products of the following reactions does not react with Hinsberg reagent to form sulphonamide? JEE Main 2021 A B C D Q- The total number of reagents from those given below, that can convert nitrobenzene into aniline is ____. (Integer answer) I. Sn - HCl II. Sn - NH4OH III. Fe - HCl IV. Zn - HCl V. H2 - Pd VI. H2 - Raney Nickel JEE Main 2021 Q- The most suitable reagent for the given conversion is JEE Main 2020 A LiAIH4 B NaBH4 C H2/Pd D B2H6 Q- Consider the following reaction sequence : JEE Main 2022 The product ‘B’ is : A B C D Q- Which of the following reagent is used for the following reaction? JEE Main 2021 A B Copper at high temperature and pressure Manganese acetate C Molybdenum oxide D Potassium permanganate Q- Which of the following reagent is suitable for the preparation of the product in the above reaction? A Red P + Cl2 B Ni/H2 C NaBH4 D Q- Which one of the following reactions will not form acetaldehyde? JEE Main 2021 A B C D Q- The correct sequence of reagents used in the preparation of of 4 - bromo - 2 - nitroethyl benzene from benzene is : JEE Main 2021 A CH3COCl/AlCl3, Zn - Hg/HCl, Br2/AlBr3, HNO3/H2SO4 B HNO3/H2SO4, Br2/AlCl3, CH3COCl/AlCl3, Zn - Hg/HCl C CH3COCl/AlCl3, Br2/AlBr3, HNO3/H2SO4, Zn/HCl D Br2/AlBr3, CH3COCl/AlCl3, HNO3/H2SO4, Zn/HCl Q- The major product of the following reaction is : JEE Main 2021 A B CH3CH2CH2CHO C CH3CH2CH2CH2CHO D CH3CH2CH = CH - CHO Q- In the above reaction, the reagent “A” is : A HCl, Zn - Hg B Alkaline KMnO4, H+ C LiAIH4 D NaBH4, H3O+ JEE Main 2021 Q- The Hinsberg reagent is JEE Main 2015 A B C D Q- The correct sequential order of the reagents for the given reaction is JEE Main 2022 A HNO2, Fe/H+, HNO2, KI, H2O/H+ B HNO2, KI, Fe/H+, HNO2, H2O/warm C HNO2, KI, HNO2, Fe/H+, H2O/H+ D HNO2, Fe/H+, KI, HNO2, H2O/warm Q- Choose the correct option for the following reactions. JEE Main 2022 A B ‘A’ and ‘B’ are both Markovnikov addition products ‘A’ is Markovnikov product and ‘B’ is anti-Markovnikov product C ‘A’ and ‘B’ are both anti-Markovnikov products D ‘B’ is Markovnikov and ‘A’ is anti-Markovnikov product Q- Consider the above reaction sequence, the product ‘C’ is A B C D JEE Main 2022 Carbonyl Compounds Consider the above reaction and predict the major product. A B C D JEE Main 2022 A compound 'A' on reaction with 'X’ and 'Y' produces the same major product but different by product 'a' and 'b'. Oxidation of 'a' gives a substance produced by ants . JEE Main 2022 X and Y are : A KMnO4/H+ and dil. KMnO4, 273 K B KMnO4(dilute), 273 K and KMnO4/H+ C KMnO4/H+ and O3, H2O/Zn D O3, H2O/Zn and KMnO4/H+ The products formed in the following reaction, A and B are JEE Mains 2022 A B C D Consider the following reaction sequence : The product ‘B’ is : JEE Mains 2022 A B C D In the following reaction A is: JEE Main 2020 A C B D Q- Which dicarboxylic acid in presence of a dehydrating agent is least reactive to give an anhydride? JEE Main 2019 A B C D Q- The major product obtained in the following reaction is JEE Main 2019 A B C D Q- The major product of the following reaction is: JEE Main 2019 A B C D Q- In the following reaction Aldehyde Alcohol HCHO t CH3CHO MeOH BuOH The best combination is A B HCHO and MeOH HCHO and tBuOH C CH3CHO and tBuOH D CH3CHO and MeOH JEE Main 2019 Q- In the following reactions, products A and B are JEE Main 2019 A B C D Q- The increasing order of the reactivity of the following with LiAlH4 is JEE Main 2019 A B (A) < (B) < (C) < (D) (B) < (A) < (D) < (C) C (A) < (B) < (D) < (C) D (B) < (A) < (C) < (D) Q- The major product of the following reaction is JEE Main 2019 A B C D Q- The major product of the following reaction is JEE Main 2019 A CH3CH2CH2CH2OH B CH3CH2CH2CHO C CH3CH2CH2CO2CH3 D CH3CH = CHCH2OH Q- The major product of the following reaction is JEE Main 2019 A B C D Q- What is the product of following reaction? JEE Main 2019 A B C D Q- The increasing order of the reactivity of the following compounds in nucleophilic addition reaction is Propanal, Benzaldehyde, Propanone, Butanone JEE Main 2020 A B Propanal < Propanone < Butanone < Benzaldehyde Benzaldehyde < Propanal < Propanone < Butanone C Benzaldehyde < Butanone < Propanone < Propanal D Butanone < Propanone < Benzaldehyde < Propanal Q- The compound A in the following reactions is JEE Main 2020 A B C D Q- The correct match between Item-I (starting material) and Item-II (reagent) for the preparation of benzaldehyde is Item-I Item-II (I) Benzene (P) HCl and SnCl2, H3O+ (II) Benzonitrile (Q) H2, Pd-BaSO4, S and quinoline (III) Benzoyl Chloride (R) CO, HCl and AlCl3 JEE Main 2020 A B (I) - (R), (II) - (P) and (III) - (Q) (I) - (P), (II) - (Q) and (III) - (R) C (I) - (Q), (II) - (R) and (III) - (P) D (I) - (R), (II) - (Q) and (III) - (P) Q- 2,4-DNP test can be used to identify JEE Main 2021 A B Aldehyde Amine C Ether D Halogens Q- An unsaturated hydrocarbon X on ozonolysis gives A. Compound A when warmed with ammonical silver nitrate forms a bright silver mirror along the sides of the test tube. The unsaturated hydrocarbon X is: JEE Main 2021 A B C HC ≡ C – CH2 – CH3 D CH3 – C ≡ C – CH3 Q- The structure of X is: JEE Main 2021 A B C D Q- The product “A” in the above reaction is JEE Main 2021 A B C D Q- In Tollen’s test for aldehyde, the overall number of electron(s) transferred to the Tollen’s reagent formula [Ag(NH3)2]+ per aldehyde group to form silver mirror is_______. (Round off to the Nearest Integer). JEE Main 2021 Q- The number of nitrogen atoms in a semicarbazone molecule of acetone is _______. JEE Main 2021 Q- Which among the above compound/s does/do not form Silver mirror when treated with Tollen’s reagent? A B (I), (III) and (IV) only (III) and (IV) only C Only (IV) D Only (II) JEE Main 2021 Q- The major product (P) in the following reaction is JEE Main 2021 A B C D Q- Match List-I with List-II. List-I (Chemical reaction) List-II (Reagent used) (a) CH3COOCH2CH3 → CH3CH2OH (P) CH3MgBr/H3O+ (1 equivalent) (b) CH3COOCH3 → CH3CHO (Q) H2SO4/H2O (c) CH3C ≡ N → CH3CHO (R) DIBAL-H/H2O (d) CH3C ≡ N → (iv) SnCl2, HCl/H2O Choose the most appropriate match. A B (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i) (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv) C (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i) D (a)-(iv), (b)-(ii), (c)-(iii), (d)-(i) JEE Main 2021 Q- The structure of the starting compound P used in the reaction given below is: JEE Main 2021 A B C D Q- Given below are two statements : Statement I : Ethyl pent-4-yn-oate on reaction with CH3MgBr gives a 3°-alcohol. Statement II : In this reaction one mole of ethyl pent-4-yn-oate utilizes two moles of CH3MgBr. In the light of the above statements, choose the most appropriate answer from the options given below: A B Both Statement I and Statement II are true Statement I is false but Statement II is true C Statement I is true but Statement II is false D Both Statement I and Statement II are false JEE Main 2021 Q- Which one of the following is the major product of the given reaction? JEE Main 2021 A B C D Q- The structure of product C, formed by the following sequence of reactions is : JEE Main 2021 A B C D Q- Two statements are given below: Statement I: The melting point of monocarboxylic acid with even number of carbon atoms is higher than that of with odd number of carbon atoms acid immediately below and above it in the series. Statement II: The solubility of monocarboxylic acids in water decreases with increase in molar mass. Choose the most appropriate option: A B Both Statement I and Statement II are correct. Both Statement I and Statement II are incorrect. C Statement I is correct but Statement II is incorrect D Statement I is incorrect but Statement II is correct JEE Main 2022 Q- Number of electrophilic centres in the given compound is ______. JEE Main 2022 Q- Hex-4-ene-2-ol on treatment with PCC gives ‘A’ on reaction with sodium hypoiodite gives ‘B’, which on further heating with soda lime gives ‘C’. The compound ‘C’ is JEE Main 2022 A B 2-pentene Proponaldehyde C 2-butene D 4-methylpent-2-ene Q- The conversion of propan-1-ol to n-butylamine involves the sequential addition of reagents. The correct sequential order of reagents is JEE Main 2022 A (i) SOCl2 (ii) KCN (iii) H2/Ni, Na(Hg)/C2H5OH B (i) HCl (ii) H2/Ni, Na(Hg)/C2H5OH C (i) SOCl2 (ii) KCN (iii) CH3NH2 D (i) HCl (ii) CH3NH2 Q- Oxidation of toluene to benzaldehyde can be easily carried out with which of the following reagents? JEE Main 2022 A CrO3/acetic acid, H3O+ B CrO3/acetic anhydride, H3O+ C KMnO4/HCl, H3O+ D CO/HCl, anhydrous AlCl3 Q- The final product ‘A’ in the following reaction sequence JEE Main 2022 A B C D Q- Given below are two statements: Statement I: The esterification of carboxylic acid with an alcohol is a nucleophilic acyl substitution. Statement II: Electron withdrawing groups in the carboxylic acid will increase the rate of esterification Reaction. Choose the most appropriate option : A B Both Statement I and Statement II are correct. Both Statement I and Statement II are incorrect C Statement I is correct but Statement II is incorrect D Statement I is incorrect but Statement II is correct JEE Main 2022 Q- The spin only magnetic moment of the complex present in Fehling’s reagent is_____ B.M. (Nearest integer). JEE Main 2022 Amines Q-The reaction of with bromine and KOH gives RNH2 as the end product. Which one of the following is the intermediate product formed in this reaction? JEE Main 2022 A B R – NH – Br C D R–N=C=O Q-The increasing order of pKb for the following compounds will be JEE Main 2020 A (B) < (C) < (A) B (B) < (A) < (C) C (C) < (A) < (B) D (A) < (B) < (C) Q- Primary, secondary and tertiary amines can be separated using JEE Main 2021 A Para-Toluene sulphonyl chloride B Acetyl amide C Chloroform and KOH D Benzene sulphonic acid Q- The correct sequential order of the reagents for the given reaction is JEE Main 2022 A HNO2, Fe/H+, HNO2, KI, H2O/H+ B HNO2, KI, Fe/H+, HNO2, H2O/warm C HNO2, KI, HNO2, Fe/H+, H2O/H+ D HNO2, Fe/H+, KI, HNO2, H2O/warm Q- The correct stability order of the following diazonium salt is A (A) > (B) > (C) > (D) B (A) > (C) > (D) > (B) C (C) > (A) > (D) > (B) D (C) > (D) > (B) > (A) Q-The tests performed on compound X and their inferences are : Test Inference (a) 2,4-DNP test Coloured precipitate (b) Iodoform test Yellow precipitate (c) Azo-dye test No dye formation Compound ‘X’ is JEE Main 2019 A B C D Q- Consider the above reaction, the compound ‘A’ is : A B C D JEE Mains 2022 Q- Which among the following represent reagent ‘A’? A B C D JEE Mains 2022 Q- The Hinsberg reagent is JEE Main 2015 A B C D Q- The total number of reagents from those given below, that can convert nitrobenzene into aniline is ____. (Integer answer) I. Sn - HCl II. Sn - NH4OH III. Fe - HCl IV. Zn - HCl V. H2 - Pd VI. H2 - Raney Nickel JEE Main 2021 Q- Which one of the following products of the following reactions does not react with Hinsberg reagent to form sulphonamide? JEE Main 2021 A B C D Q-Among the following structures, which will show the most stable enamine formation? (Where Me is –CH3) JEE Main 2022 A B C D Q-An organic compound ‘A’ on reaction with NH3 followed by heating gives compound B. Which on further strong heating gives compound C(C8H5NO2). Compound C on sequential reaction with ethanolic KOH, alkyl chloride and hydrolysis with alkali gives a primary amine. The compound A is : JEE Main 2022 A B C D Q-With respect to the following reaction, consider the given statements: (A) o-Nitroaniline and p-nitroaniline are the predominant products. (B) p-Nitroaniline and m-nitroaniline are the predominant products. (C) HNO3 acts as an acid. (D) H2SO4 acts as an acid. Choose the correct option. JEE Main 2022 A (A) and (C) are correct statements B (A) and (D) are correct statements C (B) and (D) are correct statements D (B) and (C) are correct statements Q-Identify A in the following reaction JEE Main 2021 A B C D Q- Consider the above reactions, the product A and product B respectively are JEE Main 2022 A C B D Q- In Friedel-Crafts alkylation of aniline, one gets JEE Main 2022 A Alkylated product with ortho and para substitution B Secondary amine after acidic treatment C An amide product D Positively charged nitrogen at benzene ring Q-A primary aliphatic amine on reaction with nitrous acid in cold (273 K) and there after raising temperature of reaction mixture to room temperature (298 K), gives JEE Main 2022 A Nitrile B Alcohol C Diazonium salt D Secondary amine Q- Consider the given reaction, percentage yield of : JEE Main 2021 A C>B>A B C>A>B C B>C>A D A>C>B Q-The Kjeldahl method of Nitrogen estimation fails for which of the following reaction products? JEE Main 2020 A (a), (c) and (d) B (a) and (d) C (c) and (d) D (b) and (c) Q-Three isomers A, B and C (mol. formula C8H11N) give the following results JEE Main 2020 A B C D Q-The correct structures of A and B formed in the following reactions are : JEE Main 2021 A B C D Biomolecules Q- Match List - I with List - II List - I List - II (A) Glucose + HI (i) Gluconic acid (B) Glucose + Br2 water (ii) Glucose (C) Glucose + acetic anhydride (iii) Saccharic acid (D) Glucose + HNO3 (iv) Hexane Choose the correct answer from the options given below : A (A)- (IV), (B)-(I), C-(II), (D)- (III) B (A)- (IV), (B)-(III), C-(II), (D)- (I) C (A)- (III), (B)-(I), C-(IV), (D)- (II) D (A)- (I), (B)-(III), C-(IV), (D)- (II) JEE Main 2022 Q- Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Amylose is insoluble in water. Reason R : Amylose is a long linear molecule with more than 200 glucose units. In the light of the above statements, choose the correct answer from the options given below. JEE Main 2022 A Both A and R are correct and R is the correct explanation of A B Both A and R are correct but R is NOT the correct explanation of A C A is correct but R is not correct D A is not correct but R is correct Q- Hydrolysis of sucrose gives: JEE Main 2021 A 𝝰-D-(–)-Glucose and 𝝱-D-(–)-Fructose B 𝝰-D-(+)-Glucose and 𝝱-D-(–)-Fructose C 𝝰-D-(–)-Glucose and 𝝰-D-(–)-Fructose D 𝝰-D-(+)-Glucose and 𝝱-D-(–)-Fructose Q-Match List-I with List-II. List-I List-II (a) Sucrose (i) β -D-Galactose and β - D - Glucose (b) Lactose (ii) α - D - Glucose and β - D - Fructose (c) Maltose (iii) α - D - Glucose and α - D - Glucose Choose the correct answer from the options given below : JEE Main 2021 A (a) → (i), (b) → (iii), (c) → (ii) B (a) → (iii), (b) → (ii), (c) → (i) C (a) → (ii), (b) → (i), (c) → (iii) D (a) → (iii), (b) → (i), (c) → (ii) Q- Which of the following is correct structure of tyrosine? JEE Main 2021 A B C D Q- Thiamine and pyridoxine are also known respectively as: JEE Main 2021 A Vitamin E and Vitamin B2 B Vitamin B2 and Vitamin E C Vitamin B1 and Vitamin B6 D Vitamin B6 and Vitamin B2 Q- Which one among the following chemical tests is used to distinguish monosaccharide from disaccharide? JEE Main 2021 A Seliwanoff’s test B Iodine test C Tollen’s test D Barfoed test Q- In alanylglycylleucylalanyvaline, the number of peptide linkages is __________., JEE Main 2022 Q- How many of the given compounds will give a positive Biuret test_________? Glycine, Glycylalanine, Tripeptide, Biuret. JEE Main 2022 Q- Sugar moiety in DNA and RNA molecules respectively are JEE Main 2022 A 𝝱-D-2-deoxyribose, 𝝱-D-deoxyribose B 𝝱-D-2-deoxyribose, 𝝱-D-ribose C 𝝱-D-ribose, 𝝱-D-2-deoxyribose D 𝝱-D-deoxyribose, 𝝱-D-2-deoxyribose Q-During the denaturation of proteins, which of these structures will remain intact? JEE Main 2022 A Primary B Secondary C Tertiary D Quaternary Q-The correct sequence of amino acids present in the tripeptide given below is The given tripeptide contains. JEE Main 2019 A Leu - Ser - Thr B Thr - Ser - Val C Val - Ser - Thr D Thr - Ser - Leu Q-Glucose and Galactose are having identical configuration in all the positions except position. JEE Main 2019 A C–2 B C–5 C C–3 D C–4 Q-Which of the following is not an essential amino acid? JEE Main 2020 A Tyrosine B Valine C Lysine D Leucine Q-Which of the following statements is not true about RNA? JEE Main 2019 A It usually does not replicate B It is present in the nucleus of the cell C It controls the synthesis of protein D It has always double stranded α - helix structure Q-The mass percentage of nitrogen in histamine is _____. JEE Main 2020 Q-Which of the following is correct structure of α - anomer of maltose ? JEE Main 2021 A B C D Q- Which one of the following is correct structure for cytosine ? JEE Main 2021 A B C D Q- Given below are two statements Statement I: Maltose has two 𝝰-D-glucose units linked at C₁ and C₄ and is a reducing sugar. Statement II: Maltose has two monosaccharides: 𝝰-D-glucose and 𝝱-D-glucose linked at C1 and C6 and it is a non-reducing sugar. In the light of the above statements, choose the correct answer from the options given below. JEE Main 2022 A Both Statement I and Statement II are true B Both Statement I and Statement II are false C Statement I is true but Statement II is false D Statement I is false but Statement II is true Q- A sugar ‘X’ dehydrates very slowly under acidic condition to give furfural which on further reaction with resorcinol gives the coloured product after sometime. Sugar ‘X’ is JEE Main 2022 A Aldopentose B Aldotetrose C Oxalic acid D Ketotetrose JEE Main 2020 A (i)-(c), (ii)-(d),(iii)-(a), (iv)-(b) B (i)-(c), (ii)-(a),(iii)-(d), (iv)-(b) C (i)-(d), (ii)-(b),(iii)-(a), (iv)-(c) D (i)-(a), (ii)-(d),(iii)-(c), (iv)-(b)