Practice Questions

Q39.In the given reactions identify the reagent A and reagent B (1) A −CrO3 B −CrO3 (2) A − CrO3 B −CrO2 Cl2 (3) A −CrO2 Cl2 B −CrO2 Cl2 (4) A −CrO2 Cl2 B −CrO3

Q39.Which of the following statements is not correct about rusting of iron? JEE Main 2024 (27 Jan Shift 2) JEE Main Previous Year Paper (1) Coating of iron surface by tin prevents rusting, (2) When pH lies above 9 or 10 , rusting of iron does even if the tin coating is peeling off. not take place. (3) Dissolved acidic oxides SO2, NO2 in water act as (4) Rusting of iron is envisaged as setting up of catalyst in the process of rusting. electrochemical cell on the surface of iron object.

Q39.The solution from the following with highest depression in freezing point/lowest freezing point is (1) 180 g of acetic acid dissolved in 1 L of (2) 180 g of acetic acid dissolved in benzene aqueous solution. (3) 180 g of benzoic acid dissolved in benzene (4) 180 g of glucose dissolved in water

Q39.Which of the following statements are correct? A. Glycerol is purified by vacuum distillation because it decomposes at its normal boiling point. B. Aniline can be purified by steam distillation as aniline is miscible in water. C. Ethanol can be separated from ethanol water mixture by azeotropic distillation because it forms azeotrope. D. An organic compound is pure, if mixed M.P. is remained same. Choose the most appropriate answer from the options given below : (1) A, B, C only (2) A, C, D only (3) A, B, D only (4) B, C, D only

Q39.Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Cis form of alkene is found to be more polar than the trans form. Reason (R): Dipole moment of trans isomer of 2-butene is zero. In the light of the above statements, choose the correct answer from the options given below : (1) (A) is false but (R) is true (2) Both (A) and (R) are true and (R) is the correct explanation of (A) (3) (A) is true but (R) is false (4) Both (A) and (R) are true but (R) is NOT the correct explanation of (A)

Q39.Appearance of blood red colour, on treatment of the sodium fusion extract of an organic compound with FeSO4 in presence of concentrated H2 SO4 indicates the presence of element/s (1) Br (2) N (3) N and S (4) S

Q39.The product (C) in the below mentioned reaction is: KOHalc HBr ∆ CH3 - CH2 - CH2 - Br →∆ A → B →KOHaq C (1) Propan-1-ol (2) Propene (3) Propyne (4) Propan-2-ol

Q39.Which of the following has highly acidic hydrogen? (1) (2) (3) (4)

Q40. Which of the following are aromatic? (1) A and C only (2) B and D only (3) C and D only (4) A and B only

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.What pressure (bar) of H2 would be required to make emf of hydrogen electrode zero in pure water at 25∘C ? (1) 10−7 (2) 0.5 (3) 1 (4) 10−14

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 correct IUPAC name of [PtBr2(PMe3)2] is : (1) dibromodi(trimethylphosphine)platinum(II) (2) bis(trimethylphosphine)dibromoplatinum(II) (3) dibromobis(trimethylphosphine)platinum(II) (4) bis[bromo(trimethylphosphine)]platinum(II)

Q40.The ascending order of acidity of – OH group in the following compounds is : (A) Bu – OH Choose the correct answer from the options given below : (1) (A) < (D) < (C) < (B) < (E) (2) (C) < (A) < (D) < (B) < (E) (3) (C) < (D) < (B) < (A) < (E) (4) (A) < (C) < (D) < (B) < (E)

Q40.Identify product A and product B (1) (2) (3) (4)

Q40.Identify the mixture that shows positive deviations from Raoult's Law (1) ( CH3 ) 2CO + C6H5NH2 (2) CHCl3 + C6H6 ) (3) CHCl3 + ( CH3 ) 2CO (4) ( CH3 2CO + CS2

Q40.Given below are two statements: Statement (I) : Oxygen being the first member of group 16 exhibits only – 2 oxidation state. Statement (II) : Down the group 16 stability of +4 oxidation state decreases and +6 oxidation state increases. In the light of the above statements, choose the most appropriate answer from the options given below: (1) Statement I is correct but Statement II is (2) Both Statement I and Statement II are correct incorrect (3) Both Statement I and Statement II are incorrect (4) Statement I is incorrect but Statement II is correct

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+

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 of the following is metamer of the given compound (X) ? (1) (2) (3) (4)

Q41.Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Both rhombic and monoclinic sulphur exist as S8 while oxygen exists as O2 . Reason (R) : Oxygen forms pπ −pπ multiple bonds with itself and other elements having small size and high electronegativity like C, N , which is not possible for sulphur. In the light of the above statements, choose the most appropriate answer from the options given below : (1) (A) is correct but (R) is not correct (2) (A) is not correct but (R) is correct (3) Both (A) and (R) are correct and (R) is the (4) Both (A) and (R) are correct but (R) is not the correct explanation of (A) correct explanation of (A)

Q41. Given below are two statements: Statements I: IUPAC name of Compound A is 4-chloro-1,3-dinitrobenzene. Statements II: IUPAC name of Compound B is 4-ethyl-2-methylaniline. In the light of the above statements, choose the most appropriate answer from the options given below: (1) Both Statement I and Statement II are incorrect. (2) Both Statement I and Statement II are correct. (3) Statement I is correct but Statement II is (4) Statement I is incorrect but Statement II is incorrect. correct.

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.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