Practice Questions

Q40. Product P is JEE Main 2024 (04 Apr Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q40.For the Compounds : (A) H3C −CH2 −O −CH2 −CH2 −CH3 (B) H3C −CH22 −CH2 −CH2 −CH3 (C) (D) The increasing order of boiling point is : Choose the correct answer from the options given below : (1) (D) < ( C ) < ( A ) < ( B ) (2) (B) < (A) < (C) < (D) (3) (A) < (B) < (C) < (D) (4) (B) < (A) < (D) < (C)

Q40.Which out of the following is a correct equation to show change in molar conductivity with respect to concentration for a weak electrolyte, if the symbols carry their usual meaning : JEE Main 2024 (09 Apr Shift 2) JEE Main Previous Year Paper 2 = 0 (2) Λ2mC −KaΛ∘2m + KaΛmΛm = 0 (1) Λm −Λ0m + AC 1 2 = 0 (3) Λ2mC + KaΛ∘2m −KaΛmΛ∘m = 0 (4) Λm −Λ∘m −AC 1

Q40.The emf of cell Tl Tl+ Cu2+ Cu is 0.83 V at 298 K. It could be increased by : (0.001M) (0.01M) (1) decreasing concentration of both Tl+ and Cu2+ (2) increasing concentration of Cu2+ ions ions (3) increasing concentration of T1+ ions (4) increasing concentration of both Tl+ and Cu2+ ions

Q40.Which of the following acts as a strong reducing agent? (Atomic number : Ce = 58, Eu = 63, Gd = 64, Lu = 71) (1) Lu3+ (2) Gd3+ (3) Eu2+ (4) Ce4+

Q41.The major product(P) in the following reaction is (1) (2) (3) (4) JEE Main 2024 (29 Jan Shift 1) JEE Main Previous Year Paper

Q41.Highest enol content will be shown by : JEE Main 2024 (27 Jan Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q41.The metals that are employed in the battery industries are A. Fe, B. Mn, C. Ni, D. Cr, E. Cd Choose the correct answer from the options given below: (1) B, C and E only (2) A, B, C, D and E (3) A, B, C and D only (4) B, D and E only

Q41.The reaction; 1 2 H2( g) + AgCl(s) →H+(aq) + Cl−(aq) + Ag(s) occurs in which of the following galvanic cell : (1) Ag AgCl(s) KCl(soln.) AgNO3 (aq.) Ag (2) Pt H2( g) HCl(soln.) AgCl(s) Ag (3) Pt H2( g) KCl(soln. ) AgCl(s) Ag (4) Pt H2( g) HCl(soln.) AgNO3(aq) Ag −−

Q41.Identify 𝐴 and 𝐵 in the following reaction sequence. (1) (2) (3) (4)

Q41.Diamagnetic Lanthanoid ions are: (1) Nd3+ and Eu3+ (2) La3+ and Ce4+ (3) Nd3+ and Ce4+ (4) Lu3+ and Eu3+ JEE Main 2024 (30 Jan Shift 1) JEE Main Previous Year Paper

Q41. In the above chemical reaction sequence " A " and " B " respectively are (1) H2O, H+ and KMnO4 (2) O3, Zn/H2O and NaOH(alc) /I2 (3) O3, Zn/H2O and KMnO4 (4) H2O, H+ and NaOH(alc)/I2

Q41.Match List I with List II List - I (Cell) List - II (Use/Property/Reaction) Converts energy of combustion into electrical A. Leclanche cell I. energy Does not involve any ion in solution and is used Choose the correct B. Ni −Cd cell II. in hearing aids C. Fuel cell III. Rechargeable D. Mercury cell IV. Reaction at anode Zn →Zn2+ + 2e− answer from the options given below: (1) A-II, B-III, C-IV, D-I (2) A-I, B-II, C-III, D-IV (3) A-III, B-I, C-IV, D-II (4) A-IV, B-III, C-I, D-II

Q41.In Kjeldahl's method for estimation of nitrogen, CuSO4 acts as : (1) Reducing agent (2) Catalytic agent (3) Hydrolysis agent (4) Oxidising agent

Q41.Choose the correct statements about the hydrides of group 15 elements. A. The stability of the hydrides decreases in the order NH3 > PH3 > AsH3 > SbH3 > BiH3 B. The reducing ability of the hydrides increases in the order NH3 < PH3 < AsH3 < SbH3 < BiH3 C. Among the hydrides, NH3 is strong reducing agent while BiH3 is mild reducing agent. D. The basicity of the hydrides increases in the order NH3 < PH3 < AsH3 < SbH3 < BiH3 Choose the most appropriate from the option given below: (1) B and C only (2) C and D only (3) A and B only (4) A and D only

Q41.Which of the following statements are correct about Zn, Cd and Hg ? A. They exhibit high enthalpy of atomization as the d-subshell is full. B. Zn and Cd do not show variable oxidation state while Hg shows +I and + II. C. Compounds of Zn, Cd and Hg are paramagnetic in nature. D. Zn, Cd and Hg are called soft metals. Choose the most appropriate from the options given below: (1) B, D only (2) B, C only (3) A, D only (4) C, D only

Q42.In the given reactions identify A and B . (1) 𝐴 : 2–Pentyne B : trans – 2 – butene (2) A : n – Pentane B : trans – 2 – butene (3) A : 2 – Pentyne B : Cis – 2 – butene (4) A : n – Pentane B : Cis – 2 – butene

Q42.The arenium ion which is not involved in the bromination of Aniline is (1) (2) (3) (4)

Q42.Identify the factor from the following that does not affect electrolytic conductance of a solution. (1) The nature of the electrolyte added. (2) The nature of the electrode used. (3) Concentration of the electrolyte. (4) The nature of solvent used.

Q42.For the electro chemical cell If E0 = 0.46 V and E0 = 0.34 V. Which of the following is correct? (M2+/M) (x/X2−) (1) M + X →M2+ + X2− is a spontaneous reaction (2) Ecell = 0.80 V (3) Ecell = −0.80 V (4) M2+ + X2−→M + X is a spontaneous reaction

Q42.The orange colour of K2Cr2O7 and purple colour of KMnO4 is due to (1) Charge transfer transition in both. (2) d →d transition in KMnO4 and charge transfer transitions in K2Cr2O7. (3) d →d transition in K2Cr2O7 and charge transfer (4) d →d transition in both. transitions in KMnO4. Q43.𝐴 and 𝐵 formed in the following reactions are: CrO2Cl2 + 4NaOH →A + 2NaCl + 2H2O A + 2HCl + 2H2O2 →B + 3H2O (1) A = Na2CrO4, B = CrO5 (2) A = Na2Cr2O4, B = CrO4 (3) A = Na2Cr2O7, B = CrO3 (4) A = Na2Cr2O7, B = CrO5

Q42.For a reaction A K1→ B K2→ C If the rate of formation of B is set to be zero then the concentration of B is given by : (1) (K1 + K2)[A] (2) (K1/K2)[A] (3) (K1 −K2)[A] (4) K1 K2[ A]

Q42.Choose the correct statements from the following A. All group 16 elements form oxides of general formula 𝐸𝑂2 and 𝐸𝑂3 where 𝐸= 𝑆, 𝑆𝑒, 𝑇𝑒 and 𝑃𝑜. Both the types of oxides are acidic in nature. B. 𝑇𝑒𝑂2 is an oxidising agent while 𝑆𝑂2 is reducing in nature. C. The reducing property decreases from 𝐻2𝑆 to 𝐻2𝑇𝑒 down the group. D. The ozone molecule contains five lone pairs of electrons. Choose the correct answer from the options given below: (1) A and D only (2) B and C only (3) C and D only (4) A and B only JEE Main 2024 (31 Jan Shift 2) JEE Main Previous Year Paper

Q42.Match List-I with List-II List I (Species) List II (Electronic distribution) A. Cr+2 i. 3d8 B. Mn+ ii. 3d34s1 C. Ni+2 iii. . 3d4 D. V+ iv. 3d54s1 Choose the correct answer from the options given below: (1) (A)-I, (B)-II, (C)-III, (D)-IV (2) (A)-III, (B) - IV, (C) - I, (D)-II (3) (A)-IV, (B)-III, (C)-I, (D)-II (4) (A)-II, (B)-I, (C)-IV, (D)-III

Q42.For a strong electrolyte, a plot of molar conductivity against (concentration) 1/2 is a straight line, with a negative slope, the correct unit for the slope is (1) Scm2 mol−3/2 L−1/2 (2) Scm2 mol−3/2 L1/2 (3) Scm2 mol−3/2 L (4) Scm2 mol−1 L1/2