Practice Questions

Q57.Which of the following statements is incorrect for antibiotics? (1) An antibiotic must be a product of metabolism. (2) An antibiotic is a synthetic substance produced as a structural analogue of naturally occurring antibiotic. (3) An antibiotic should promote the growth or (4) An antibiotic should be effective in low survival of microorganisms. concentrations.

Q57.Match List I with List II. List I List II Reaction Reagents Hoffmann (A) (I) Conc. KOH, Δ Degradation Clemmensen (B) (II) CHCl3, NaOH /H3O+ reduction (C) Cannizzaro reaction (III) Br2, NaOH Reimer-Tiemann (D) (IV) Zn −Hg / HCl reaction (1) (A) - III, (B) - IV, (C) - II, (D) - I (2) (A) - II, (B) - IV, (C) - I, (D) - III (3) (A) - III, (B) - IV, (C) - I, (D) - II (4) (A) - II, (B) - I, (C) - III, (D) - IV

Q57. Product [X] formed in the above reaction is: (1) (2) (3) (4)

Q57.A compound ′X′ when treated with phthalic anhydride in presence of concentrated H2 SO4 yields ′Y′. ′Y′ is used as an acid/base indicator. ′X′ and ′Y′ are respectively (1) Anisole, methyl orange (2) Salicylaldehyde, Phenolphthalein (3) Toludine, Phenolphthalein (4) Carbolic acid, Phenolphthalein

Q57. In the above conversion of compound ( X ) to product ( Y ), the sequence of reagents to be used will be: (1) (i) Br2, Fe (2) (i) Br2(aq) (ii) Fe, H+ (ii) LiAlH4 (iii) LiAlH4 (iii) H3O+ (3) (i) Fe, H+ (4) (i) Fe, H+ (ii) Br2(aq) (ii) Br2(aq) (iii) HNO2 (iii) HNO2 (iv) CuBr (iv) H3 PO2

Q57.In a reaction JEE Main 2023 (01 Feb Shift 2) JEE Main Previous Year Paper reagents ‘ X ’ and ‘ Y ’ respectively are: (1) (CH3 CO)2O/H+ and CH3 OH /H+, Δ (2) (CH3 CO)2O/H+ and (CH3 CO)2O/H+ (3) CH3 OH /H+, Δ and CH3 OH /H+, Δ (4) CH3 OH /H+Δ and (CH3 CO)2O/H+

Q58.Number of compounds from the following which will not dissolve in cold NaHCO3 and NaOH solutions but will dissolve in hot NaOH solution is _____ . JEE Main 2023 (30 Jan Shift 2) JEE Main Previous Year Paper

Q58.Major product ′P′ formed in the following reaction is Major product JEE Main 2023 (08 Apr Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q58.Match List I with List II List I (Amines) List II (pKb) A. Aniline I. 3. 25 B. Ethanamine II. 3. 00 C. N-Ethylethanamine III. 9. 38 D. N, N-Diethylethanamine IV. 3. 29 Choose the correct answer from the options given below:- (1) A-I, B-IV, C-II, D-III (2) A-III, B-II, C-I, D-IV (3) A-III, B-II, C-IV, D-I (4) A-III, B-IV, C-II, D-I

Q58.Match List-I and List-II. List-I List-II A. Elastomeric polymer I. Urea formaldehyde resin B. Fibre polymer II. Polystyrene C. Thermosetting polymer III. Polyester D. Thermoplastic polymer IV. Neoprene Choose the correct answer from the options given below: (1) A-II, B-III, C-I, D-IV (2) A-II, B-I, C-IV, D-III (3) A-IV, B-III, C-I, D-II (4) A-IV, B-I, C-III, D-II

Q58.The major product ‘ P’ formed in the following sequence of reactions is JEE Main 2023 (12 Apr Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q58.Correct statement is : (1) An average human being consumes more food (2) An average human being consumes nearly 15 than air times more air than food (3) An average human being consumes equal amount (4) An average human being consumes 100 times of food and air more air than food

Q58.The major product ' P' for the following sequence of reactions is: (1) (2) (3) (4)

Q58.Which of the following compounds are not used as disinfectants? A. Chloroxylenol B. Bithional C. Veronal D. Prontosil E. Terpineol Choose the correct answer from the options given below: (1) A, B, E (2) C, D (3) A, B (4) B, D, E

Q58.Match List I with List II : s reacted with reagents in List I to form products in List II products in List II. List I (Reagent) List II (Product) A. I. B. HBF4,Δ II. C. Cu, HCl III. D. CuCN/KCN IV. Choose the correct answer from the options given below: (1) A-IV, B-III, C-II, D-I (2) A-III, B-I, C-II, D-IV (3) A-I, B-III, C-IV, D-II (4) A-III, B-I, C-IV, D-II

Q58. i) HCN−D −(+)−Glyceraldehyde → ii)H2O/H+ iii) HNO3 The products formed in the above reaction are (1) One optically active and one meso product (2) Two optically inactive products (3) Two optically active products (4) One optically inactive and one meso product Q59. ′A′ is (1) (2) (3) (4)

Q59.Match List I with List II List I (Name of polymer) List II (Uses) A Glyptal I Flexible pipes B Neoprene II Synthetic wool C Acrilan III Paints and Lacquers D LDP IV Gaskets Choose the correct answer from the options given below :- (1) A −III, B −II, C −IV, D −I (2) A −III, B −IV, C −II, D −I (3) A −III, B −IV, C −I, D −II (4) A −III, B −I, C −IV, D −II

Q59.Match List I with List II : List I List II A. Saccharin I. High potency sweetener B. Aspartame II. First artificial sweetening agent C Alitame III. Stable at cooking temperature D. Sucralose IV. Unstable at cooking temperature Choose the correct answer from the options given below : JEE Main 2023 (08 Apr Shift 1) JEE Main Previous Year Paper (1) A-IV, B-III, C-I, D-II (2) A-II, B-III, C-IV, D-I (3) A-II, B-IV, C-III, D-I (4) A-II, B-IV, C-I, D-III

Q59.Formation of which complex, among the following, is not a confirmatory test of Pb2+ ions (1) Lead sulphate (2) Lead nitrate (3) Lead chromate (4) Lead iodide

Q59.Match List I with List II List I List II Antimicrobials Names (A) Narrow Spectrum (I) Furacin Antibiotic (B) Antiseptic (II) Sulphur dioxide (C) Disinfectants (III) Penicillin-G (D) Broad spectrum antibiotic (IV) Chloramphenicol (1) (A) - III, (B) - I, (C) - II, (D) - IV (2) (A) - I, (B) - II, (C) - IV, (D) - III (3) (A) - II, (B) - I, (C) - IV, (D) - III (4) (A) - III, (B) - I, (C) - IV, (D) - II JEE Main 2023 (29 Jan Shift 1) JEE Main Previous Year Paper

Q59.Compoun ′B′ is (1) (2) (3) (4)

Q59.The product (P) formed from the following multistep reaction is: (1) (2) (3) (4)

Q59.Match List I with List II LIST II LIST I Type Name AAntifertility I Norethindrone drug B Tranquilizer II Meprobomate C AntihistamineIII Seldane DAntibiotic IVAmpicillin JEE Main 2023 (24 Jan Shift 2) JEE Main Previous Year Paper Choose the correct answer from the options given below : (1) A-II, B-I, C-III, D-IV (2) A-IV, B-III, C-II, D-I (3) A-I, B-III, C-II, D-IV (4) A-I, B-II, C-III, D-IV

Q59.Match items of Row I with those of Row II. Row I: (P) (Q) (R) JEE Main 2023 (25 Jan Shift 1) JEE Main Previous Year Paper (S) Row II: (i) α‐D‐(—) Fructofuranose. (ii) β‐D‐(—) Fructofuranose. (iii) α‐D‐(‐) Glucopyranose. (iv) β‐D‐(‐) Glucopyranose. Correct match is (1) P→iv, Q→iii, R→i, S→ii (2) P→i, Q→ii, R→iii, S→iv (3) P→iii, Q→iv, R→ii, S→i (4) P→iii, Q→iv, R→i, S→ii

Q59.All structures given below are of vitamin C. Most stable of them is: (1) (2) (3) (4)