Practice Questions

Q47.L-isomer of tetrose X ( C4H8O4 ) gives positive Schiff’s test and has two chiral carbons. On acetylation ‘X’ yields triacetate. ‘X’ also undergoes following reactions. (1) (2) (3) (4) JEE Main 2023 (11 Apr Shift 1) JEE Main Previous Year Paper Q48. ‘A’ and ‘B’ in the above reactions are: (1) (2) (3) (4) Q49. 'X' (1) (2) (3) (4)

Q49.Match List I with List II: List I (Monomer) List II (Polymer) (A) Tetrafluoroethene (I) Orlon (B) Acrylonitrile (II) Natural rubber (C) Caprolactam (III) Teflon (D) Isoprene (IV) Nylon- 6 Choose the correct answer from the options given below: (1) (A) −(III), (B) −(I), (C) −(IV), (D) −(II) (2) (A) −(IV), (B) −(I), (C) −(II), (D) −(III) (3) (A) −(III), (B) −(IV), (C) −(II), (D) −(I) (4) (A) −(II), (B) −(III), (C) −(IV), (D) −(I)

Q49.Consider the following reaction that goes from A to B in three steps as shown below: Choose the correct option Number of Rate Number of Activated determining Intermediates Complexes step (1) 2 3 I (2) 2 3 III (3) 2 3 II (4) 3 2 II (1) (1) (2) (2) (3) (3) (4) (4)

Q50.Given below are two statements : Statement I : Noradrenaline is a neurotransmitter. Statement II : Low level of noradrenaline is not the cause of depression in human. In the light of the above statements, choose the correct answer from the options given below (1) Both statement 1 and 2 are correct.. (2) Statement 1 is correct but statement 2 is incorrect (3) Statement 1 is incorrect but statement 2 is correct (4) Both statement 1 and 2 are correct

Q51.Given below are two statements, one is labelled as Assertion A and the other is labelled as Reasom R. Assertion A: A solution of the product obtained by heating a mole of glycine with a mole of chlorine in presence of red phosphorous generates chiral carbon atom. Reason R: A molecule with 2 chiral carbons is always optically active. In the light of above statements, chose the correct answer from the options given below: (1) A is true but R is false (2) Both A and R are true but R is the correct explaination of A (3) A is false but R is true (4) Both A and R are true but R is NOT the correct explaination of A

Q52.Match List I with List II JEE Main 2023 (25 Jan Shift 2) JEE Main Previous Year Paper List I List II Coordination entity Wavelength of light absorbed in nm A [CoCl (NH3)5]2+ I. 310 B [Co (NH3)6]3+ II. 475 C [Co(CN)6]3− III. 535 D [Cu (H2O)4]2+ IV. 600 Choose the correct answer from the options given below :- (1) A −IV, B −I, C −III, D −II (2) A −III, B −II, C −I, D −IV (3) A −III, B −I, C −II, D −IV (4) A − II, B −III, C −IV, D −I

Q53.Which of the following complex is octahedral, diamagnetic and the most stable? (1) Na3[CoCl6] (2) [Ni (NH3)6] Cl2 (3) K3[Co(CN)6] (4) [Co (H2O)6] Cl2

Q54.(i) X(g) ⇌Y(g) + Z(g) Kp1 = 3 (ii) A(g) ⇌2 B( g) Kp2 = 1 If the degree of dissociation and initial concentration of both the reactants X ( g ) and A ( g ) are equal, then 𝑝1 the ratio of the total pressure at equilibrium is equal to x: 1. The value of x is (Nearest integer) 𝑝2

Q54.FeO4 θ EFeO42 - / Fe2 + is x × 10-3 V. The value of x is _______

Q54.The correct order of spin only magnetic moments for the following complex ions is (1) [Fe(CN)6]3−< [CoF6]3−< [MnBr4]2−< [Mn(CN)6]3−(2) [CoF6]3−< [MnBr4]2−< [Fe(CN)6]3−< [Mn(CN)6]3− (3) [Fe(CN)6]3−< [Mn(CN)6]3−< [CoF6]3−< [MnBr4]2−(4) [MnBr4]2−< [CoF6]3−< [Fe(CN)6]3−< [Mn(CN)6]3−

Q55.The total number of chiral compound/s from the following is Q56.25 mL of an aqueous solution of KCl was found to require 20 mL of 1M AgNO3 solution when titrated using K2CrO4 as an indicator. What is the depression in freezing point of KCl solution of the given concentration? (Nearest integer). (Given : Kf = 2 . 0 K kg mol-1 ) Assume 1) 100% ionization and 2) density of the aqueous solution as 1 g mL-1

Q55.The Cl −Co −Cl bond angle values in a fac- [Co (NH3)3 Cl3] complex is/are: (1) 90° & 180° (2) 90° (3) 180° (4) 90° & 120° JEE Main 2023 (30 Jan Shift 2) JEE Main Previous Year Paper

Q55.Identify the correct order for the given property for following compounds Choose the correct answer from the option given below :- (1) (B), (C) and (D) only (2) (A), (C) and (E) only (3) (A), (C) and (D) only (4) (A), (B) and (E) only

Q55.Cyclohexylamine when treated with nitrous acid yields (P). On treating (P) with PCC results in (Q). When (Q) is heated with dil. NaOH we get (R) The final product (R) is: (1) (2) (3) (4)

Q56.Find out the major products from the following reaction sequence. JEE Main 2023 (29 Jan Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q56. In the above reaction, left hand side and right hand side rings are named as ‵A′ and ‵B′ respectively. They undergo ring expansion. The correct statement for this process is: (1) Ring expansion can go upto seven membered (2) Finally both rings will become six membered rings each. (3) Finally both rings will become five membered (4) Only A will become 6 membered. each.

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.Number of isomeric aromatic amines with molecular formula C8H11N, which can be synthesized by Gabriel Phthalimide synthesis is _____.

Q57.For the given reaction The, total number of possible products formed by tertiary carbocation of A is _______. JEE Main 2023 (13 Apr Shift 1) JEE Main Previous Year Paper

Q57.In an electrochemical reaction of lead, at standard temperature, if EPb2o + / Pb = n Volt, then the value of E°Pb2 + / Pb4 + is given by m – xn. The value of x is _______. EPb4o + / Pb (Nearest integer)

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.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 _____ .

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. 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.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