Practice Questions

Q37. IUPAC name of following hydrocarbon (X) is : (1) 2-Ethyl-3,6-dimethylheptane (2) 2,5,6-Trimethyloctane (3) 3,4,7-Trimethyloctane (4) 2-Ethyl-2,6-diethylheptane

Q37. IUPAC name of following compound (P) is : JEE Main 2024 (27 Jan Shift 1) JEE Main Previous Year Paper (1) 1 −Ethyl −5, 5 −dimethylcyclohexane (2) 3 −Ethyl −1, 1 −dimethylcyclohexane (3) 1 −Ethyl −3, 3 −dimethylcyclohexane (4) 1, 1 −Dimethyl −3 −ethylcyclohexane

Q37. For the given compounds, the correct order of increasing pKa value : Choose the correct answer from the options given below : (1) (B) < (D) < (C) < (A) < (E) (2) (D) < (E) < (C) < (B) < (A) (3) (E) < (D) < ( C ) < ( B ) < ( A ) (4) (E) < (D) < (B) < (A) < (C) JEE Main 2024 (09 Apr Shift 1) JEE Main Previous Year Paper

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

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.The interaction between π bond and lone pair of electrons present on an adjacent atom is responsible for (1) Hyperconjugation (2) Inductive effect (3) Electromeric effect (4) Resonance effect

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 among the following is incorrect statement? (1) Electromeric effect dominates over inductive (2) The electromeric effect is, temporary effect effect (3) Hydrogen ion (H+)shows negative electromeric (4) The organic compound shows electromeric effect effect in the presence of the reagent only.

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.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.Given below are two statements: Statement I: IUPAC name of HO - CH2 - ( CH2 ) - CH2 - COCH3 is 7-hydroxyheptan-2-one. 3 Statement II: 2-oxoheptan-7-ol is the correct IUPAC name for the above compound. 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 incorrect. incorrect. (3) Both Statement I and Statement II are correct. (4) Statement I is incorrect but Statement II is correct. JEE Main 2024 (31 Jan Shift 1) JEE Main Previous Year Paper

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

Q38.Which among the following has highest boiling point? (1) CH3CH2CH2CH3 (2) CH3CH2CH2CH2 - OH (3) CH3CH2CH2CHO (4) H5C2 - O - C2H5

Q38.Number of σ and π bonds present in ethylene molecule is respectively : (1) 4 and 1 (2) 5 and 2 (3) 3 and 1 (4) 5 and 1

Q38.Functional group present in sulphonic acids is : (1) −SO4H (2) −SO3H (3) (4) −SO2 JEE Main 2024 (06 Apr Shift 1) JEE Main Previous Year Paper

Q38. Cyclohexene is _________ type of an organic compound. (1) Benzenoid aromatic (2) Benzenoid non-aromatic (3) Acyclic (4) Alicyclic

Q38.The correct stability order of the following resonance structures of CH3 −CH = CH −CHO is (1) I > II > III (2) II > III > I (3) II > I > III (4) III > II > I

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

Q38. List - I List - II (Pair of compounds) (Isomerism) (A) n-propanol and Isopropanol (I) Metamerism Match List I with List II Choose the (B) Methoxypropane and ethoxyethane (II) Chain Isomerism (C) Propanone and propanal (III) Position Isomerism (D) Neopentane and Isopentane (IV) Functional Isomerism correct answer from the options given below : (1) (A)-(II), (B)-(I), (C)-(IV), (D)-(III) (2) (A)-(III), (B)-(I), (C)-(II), (D)-(IV) (3) (A)-(I), (B)-(III), (C)-(IV), (D)-(II) (4) (A)-(III), (B)-(I), (C)-(IV), (D)-(II)

Q38.If a substance '𝐴' dissolves in solution of a mixture of ' 𝐵' and ' 𝐶 ' with their respective number of moles as 𝑛𝐴, 𝑛𝐵 and 𝑛𝐶, mole fraction of 𝐶 in the solution is: JEE Main 2024 (30 Jan Shift 2) JEE Main Previous Year Paper nC nC (1) (2) nA × nB × nC nA + nB + nC (3) nC (4) nB nA - nB - nC nA + nB

Q38. Identify (B) and (C) and how are (A) and (C) related ? (1) (2) (3) (4)

Q38.Relative stability of the contributing structures is : (1) (I) > (II) > (III) (2) (I) > (III) > (II) (3) (II) > (I) > (III) (4) (III) > (II) > (I)