Practice Questions

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.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.Given below are two statements : Statement I: Group 13 trivalent halides get easily hydrolysed by water due to their covalent nature. Statement II: AlCl3 upon hydrolysis in acidified aqueous solution forms octahedral AlH2O6 3 + ion. 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 false (4) Both statement I and statement II are true

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

Q37.For a sparingly soluble salt AB2 , the equilibrium concentrations of A2+ ions and B− ions are 1.2 × 10−4M and 0.24 × 10−3M, respectively. The solubility product of AB2 is : (1) 6.91 × 10−12 (2) 0.276 × 10−12 (3) 27.65 × 10−12 (4) 0.069 × 10−12

Q37.Given below are two statements: Statement (I) : SiO2 and GeO2 are acidic while SnO and PbO are amphoteric in nature. Statement (II) : Allotropic forms of carbon are due to property of catenation and pπ - dπ bond formation. 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 false (2) Both Statement I and Statement II are true (3) Statement I is true but Statement II is false (4) Statement I is true but Statement II is true

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.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. 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.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.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.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 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.Product A and B formed in the following set of reactions are: (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.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. 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 final product A, formed in the following reaction sequence is: (1) Ph - CH2 - CH2 - CH3 (2) (3) (4) Ph - CH2 - CH2 - CH2 - OH

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

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.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 structure of 2, 3-dibromo-1-phenylpentane. (1) (2) (3) (4)

Q38.Compound A formed in the following reaction reacts with B gives the product C. Find out A and B. (1) A = CH3 −C ≡C−Na+, B = CH3 −CH2 −CH2 −Br (2) A = CH3 −CH = CH2, B = CH3 −CH2 −CH2 −Br (3) A = CH3 −CH2 −CH3, B = CH3 −C ≡CH (4) A = CH3 −C ≡C−Na+, B = CH3 −CH2 −CH3

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. 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)