Practice Questions

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.The logarithm of equilibrium constant for the reaction Pd2 + + 4Cl- ⇌PdCl42 - is (Nearest integer) 2 . 303RT Given: = 0 . 06 V F Pd2 + + 2e- ⇌Pd(s) E𝑜= 0 . 83 V ( aq ) PdCl42 - (aq) + 2e- ⇌Pd(s) + 4Cl- (aq) Eo = 0 . 65 V

Q57.At 298 K, a 1 litre solution containing 10 mmol of Cr2O72 - and 100mmol of Cr3 + shows a pH of 3 . 0. 2 - + 2 . 303RT Given : Cr2O7 →Cr3 ; E0 = 1 . 330 V and F = 0 . 059 V The potential for the half cell reaction is x × 10-3 V . The value of x is _____ .

Q57.Sodium metal crystallises in a body centred cubic lattice with unit cell edge length of 4 Å. The radius of sodium atom is ___ × 10-1Å. (Nearest integer)

Q57.An organic compound [A](C4H11 N), shows optical activity and gives N2 gas on treatment with HNO2 . The compound [A] reacts with PhSO2 Cl producing a compound which is soluble in KOH. The structure of A is : JEE Main 2023 (31 Jan Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q57.The mass of NH3 produced when 131. 8 kg of cyclohexane carbaldehyde undergoes Tollen’s test is _____ kg. (Nearest Integer) Molar mass of C = 12 g/ mol N = 14 g/ mol O = 16 g/ mol

Q57.Consider the cell PtsH2g, 1atmH+aq, 1M | Fe3 + aq, Fe2 + aq Pt s When the potential of the cell is 0 . 712 V at 298 K, the ratio Fe2 + / Fe3 + is (Nearest integer) + + + + 2 . 303RT Given: Fe3 + e- = Fe2 , E°Fe3 , Fe2 Pt = 0 . 771 = 0 . 06 V F

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. 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)

Q58.Sea water contains 29 . 25 % NaCl and 19 % MgCl2 by weight of solution. The normal boiling point of the sea water is ∘C (Nearest integer) Assume 100% ionization for both NaCl and MgCl2 Given: KbH2O = 0 . 52 K kg mol-1 Molar mass of NaCl and MgCl2 is 58 . 5 and 95 g mol-1 respectively.

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.The specific conductance of 0 . 0025M acetic acid is 5 × 10-5 S cm-1 at a certain temperature. The dissociation constant of acetic acid is ___________ × 10-7.(Nearest integer) Consider limiting molar conductivity of CH3COOH as 400 S cm2 mol-1

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' for the following sequence of reactions is: (1) (2) (3) (4)

Q58.Given below are two statements: Statement I: Morphine is a narcotic analgesic. It helps in relieving pain without producing sleep. Statement II: Morphine and its derivatives are obtained from opium poppy. In the light of the above statements, choose the correct answer from the options given below (1) Both Statement I and Statement II are true (2) Statement I is true but Statement II is false (3) Both Statement I and Statement II are false (4) Statement I is false but Statement II is true

Q58.KClO3 + 6FeSO4 + 3H2SO4 → KCl + 3Fe2 ( SO4 ) + 3H2O 3 The above reaction was studied at 300 K by monitoring the concentration of FeSO4 in which initial concentration was 10 M and after half an hour became 8 . 8 M. The rate of production of Fe2 ( SO4 ) is 3 _______ × l0 – 6 mol L – 1 s – 1 (Nearest integer)

Q58.In Chromyl chloride, the oxidation state of chromium is (+) ___________.

Q58.A and B are two substances undergoing radioactive decay in a container. The half life of A is 15 min and that of B is 5 min. If the initial concentration of B is 4 times that of A and they both start decaying at the same time, how much time will it take for the concentration of both of them to be same? ________min.

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.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.For the adsorption of hydrogen on platinum, the activation energy is 30 kJ mol – 1 and for the adsorption of hydrogen on nickel, the activation energy is 41 . 4 kJ mol – 1 . The logarithm of the ratio of the rates of chemisorption on equal areas of the metals at 300 K is _______ (Nearest integer) Given: In10 = 2 . 3 R = 8 . 3 J K-1 mol-1

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.The variation of the rate of an enzyme catalyzed reaction with substrate concentration is correctly represented by graph JEE Main 2023 (25 Jan Shift 1) JEE Main Previous Year Paper (a) (b) (c) JEE Main 2023 (25 Jan Shift 1) JEE Main Previous Year Paper (d) (1) b (2) c (3) d (4) a

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)