Practice Questions

Q35.Choose the correct option for free expansion of an ideal gas under adiabatic condition from the following : (1) q = 0, ΔT ≠0, w = 0 (2) q = 0, ΔT < 0, w ≠0 (3) q ≠0, ΔT < 0, w = 0 (4) q = 0, ΔT = 0, w = 0

Q35.Given below are two statements : Statement I : On passing HCl(g) through a saturated solution of BaCl2 , at room temperature white turbidity appears. Statement II : When HCl gas is passed through a saturated solution of NaCl, sodium chloride is precipitated due to common ion effect. 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 correct (2) Statement I is correct but Statement II is incorrect (3) Both Statement I and Statement II are incorrect (4) Statement I is incorrect but Statement II is correct

Q35. List - I List - II (Compound/Species) (Shape/Geometry) A. SF4 I. Tetrahedral Match List I with List II Choose the correct B. BrF3 II. Pyramidal C. BrO−3 III. See saw D. NH+4 +KS IV. Bent T-Shape answer from the options given below: (1) A-II, B-III, C-I, D-IV (2) A-II, B-IV, C-III, D-I (3) A-III, B-IV, C-II, D-I (4) A-III, B-II, C-IV, D-I

Q35.Solubility of calcium phosphate (molecular mass, M) in water is Wg per 100 mL at 25°C . Its solubility product at 25°C will be approximately. 3 5 (1) 107W (2) 107W M M 5 5 (3) 103W (4) 105W M M JEE Main 2024 (01 Feb Shift 2) JEE Main Previous Year Paper

Q35.The correct increasing order for bond angles among BF3, PF3 and ClF3 is : (1) BF3 < PF3 < ClF3 (2) ClF3 < PF3 < BF3 (3) PF3 < BF3 < ClF3 (4) BF3 = PF3 < ClF3

Q36.Which of the following reactions are disproportionation reactions? 1 Cu+ →Cu2 + + Cu 2 3MnO42 - + 4H+ →2MnO4- + MnO2 + 2H2O 3 2KMnO4 →K2MnO4 + MnO2 + O2 4 2MnO4- + 3Mn2 + + 2H2O →5MnO2 + 4H+ Choose the correct answer from the options given below: (1) 1, 2 (2) 2, 3, 4 (3) 1, 2, 4 (4) 1, 4

Q36.Which of the following nitrogen containing compound does not give Lassaigne's test? JEE Main 2024 (04 Apr Shift 1) JEE Main Previous Year Paper (1) Urea (2) Phenyl hydrazine (3) Glycene (4) Hydrazine

Q36.The correct statements from the following are : (A) The decreasing order of atomic radii of group 13 elements is Tl > In > Ga > Al > B . (B) Down the group 13 electronegativity decreases from top to bottom. (C) Al dissolves in dil. HCl and liberates H2 but conc. HNO3 renders Al passive by forming a protective oxide layer JEE Main 2024 (05 Apr Shift 2) JEE Main Previous Year Paper on the surface. (D) All elements of group 13 exhibits highly stable +1 oxidation state. (E) Hybridisation of Al in [Al(H2O)6]3+ ion is sp3 d2 . Choose the correct answer from the options given below : (1) (A), (C) and (E) only (2) (A) and (C) only (3) (C) and (E) only (4) (A), (B), (C) and (E) only

Q36.The correct statement among the following, for a "chromatography" purification method is : (1) Organic compounds run faster than solvent in the (2) Rf is an integral value. thin layer chromatographic plate. (3) Rf of a polar compound is smaller than that of a (4) Non-polar compounds are retained at top and non-polar compound. polar compounds come down in column chromatography.

Q36.The correct sequence of acidic strength of the following aliphatic acids in their decreasing order is: CH3CH2COOH, CH3COOH, CH3CH2CH2COOH, HCOOH JEE Main 2024 (08 Apr Shift 2) JEE Main Previous Year Paper (1) CH3CH2CH2COOH > CH3CH2COOH > CH3COOH > HCOOH (2) CH3COOH > CH3CH2COOH > CH3CH2CH2COOH > HCOOH (3) HCOOH > CH3COOH > CH3CH2COOH > CH3CH2CH2COOH (4) HCOOH > CH3CH2CH2COOH > CH3CH2COOH > CH3COOH

Q36.Given below are two statements : Statement I: S8 solid undergoes disproportionation reaction under alkaline conditions to form S2 − and S2O32 − Statement II: ClO4− can undergo disproportionation reaction under acidic condition. 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) Statement I is incorrect but statement II is correct incorrect. (3) Both statement I and statement II are incorrect (4) Both statement I and statement II are correct JEE Main 2024 (31 Jan Shift 2) JEE Main Previous Year Paper

Q36. List - I List - II (Molecule/Species) (Property/Shape) A. SO2Cl2 I. Paramagnetic Match List I with List II Choose the correct answer B. NO II. Diamagnetic C. NO−2 III. Tetrahedral D. I−3 IV. Linear from the options given below: (1) A-II, B-III, C-I, D-IV (2) A-III, B-I, C-II, D-IV (3) A-IV, B-I, C-III, D-II (4) A-III, B-IV, C-II, D-I

Q36. Correct order of basic strength of Pyrrole , Pyridine , and Piperidine is: (1) Pyrrole > Piperidine > Pyridine (2) Pyrrole > Pyridine > Piperidine (3) Pyridine > Piperidine > Pyrrole (4) Piperidine > Pyridine > Pyrrole

Q37.Which one of the following will show geometrical isomerism? JEE Main 2024 (29 Jan Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q37. Correct order of stability of carbanion is - (1) d > a > c > b (2) a > b > c > d (3) d > c > b > a (4) c > b > d > a

Q37.The number of neutrons present in the more abundant isotope of boron is ' x '. Amorphous boron upon heating with air forms a product, in which the oxidation state of boron is ' y '. The value of x + y is _______ (1) 3 (2) 9 (3) 4 (4) 6

Q37.The final product A, formed in the following reaction sequence is: (1) Ph - CH2 - CH2 - CH3 (2) (3) (4) Ph - CH2 - CH2 - CH2 - OH

Q37.In acidic medium, K2Cr2O7 shows oxidising action as represented in the half reaction JEE Main 2024 (01 Feb Shift 1) JEE Main Previous Year Paper Cr2O72 - + XH+ + Ye- →2 A + ZH2O X, Y, Z and A are respectively are: (1) 8, 6, 4 and Cr2O3 (2) 14, 7, 6 and Cr3 + (3) 8, 4, 6 and Cr2O3 (4) 14, 6, 7 and Cr3 +

Q37.Among the following halogens F2, Cl2, Br2 and I2 Which can undergo disproportionation reactions? (1) F2, Cl2 and Br2 (2) F2 and Cl2 (3) Only I2 (4) Cl2, Br2 and I2

Q37.Which of the following molecule/species is most stable? (1) (2) (3) (4)

Q37.The correct nomenclature for the following compound is : (1) 2-formyl-4-hydroxyhept-7-enoic acid (2) 2-formyl-4-hydroxyhept-6-enoic acid (3) 2-carboxy-4-hydroxyhept-7-enal (4) 2-carboxy-4-hydroxyhept-6-enal

Q37.At −20∘C and 1 atm pressure, a cylinder is filled with equal number of H2, I2 and HI molecules for the reaction H2( g) + I2( g) ⇌2HI(g), the Kp for the process is x × 10−1 . x = _____ [Given : R = 0.082 L atm K−1 mol−1 ] (1) 0.01 (2) 10 (3) 2 (4) 1

Q37.The incorrect statement regarding the geometrical isomers of 2-butene is : (1) cis-2-butene and trans-2-butene are not (2) cis-2-butene and trans-2-butene are interconvertible at room temperature. stereoisomers. (3) cis-2-butene has less dipole moment than trans-2- (4) trans-2-butene is more stable than cis-2-butene. butene. JEE Main 2024 (06 Apr Shift 2) JEE Main Previous Year Paper

Q37.Product A and B formed in the following set of reactions are: (1) (2) (3) (4)

Q38.Thiosulphate reacts differently with iodine and bromine in the reactions given below: 2 S2O2−3 + I2 →S4O2−6 + 2I− Which of the following statement justifies the above dual S2O2−3 + 5Br2 + 5H2O →2SO2−4 + 4Br−+ 10H+ behaviour of thiosulphate? (1) Bromine is a stronger oxidant than iodine (2) Thiosulphate undergoes oxidation by bromine and reduction by iodine in these reaction (3) Bromine is a weaker oxidant than iodine (4) Bromine undergoes oxidation and iodine undergoes reduction in these reactions