Practice Questions

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

Q39.In qualitative test for identification of presence of phosphorous, the compound is heated with an oxidising agent. Which is further treated with nitric acid and ammonium molybdate respectively. The yellow coloured precipitate obtained is : (1) Na3PO4 ⋅12MoO3 (2) (NH4)3PO4 ⋅12MoO3 (3) MoPO4.21NH4NO3 (4) (NH4)3PO4 ⋅12(NH4)2MoO4

Q39.Identify A and B in the given chemical reaction sequence : JEE Main 2024 (05 Apr Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

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

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

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.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

Q41.Given below are two statements: Statement I : Nitration of benzene involves the following step - Statement II : Use of Lewis base promotes the electrophilic substitution of benzene. In the light of the above statements, choose the most appropriate answer from the options given below : JEE Main 2024 (05 Apr Shift 1) JEE Main Previous Year Paper (1) Statement I is correct but Statement II is incorrect(2) Statement I is incorrect but Statement II is correct (3) Both Statement I and Statement II are correct (4) Both Statement I and Statement II are incorrect

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

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.Given below are two statements : Statement I : PF5 and BrF5 both exhibit sp3 d hybridisation. Statement II : Both SF6 and [Co(NH3)6]3+ exhibit sp3 d2 hybridisation. In the light of the above statements, choose the correct answer from the options given below : (1) Statement I is true but Statement II is false (2) Statement I is false but Statement II is true (3) Both Statement I and Statement II are true (4) Both Statement I and Statement II are false