Practice Questions

Q36.The technique used for purification of steam volatile water immiscible substance is: (1) Fractional distillation (2) Fractional distillation under reduced pressure (3) Distillation (4) Steam distillation

Q36.Match List I with List II Choose the correct answer from the options given below: (1) A-I, B-II, C-III, D-IV (2) A-IV, B-I, C-II, D-III (3) A-III, B-IV, C-I, D-II (4) A-II, B-I, C-IV, D-III

Q36.The equilibrium constant for the reaction SO3(g) ⇌SO2( g) + 12 O2( g) is Kc = 4.9 × 10−2 . The value of Kc for the reaction given below is 2SO2( g) + O2( g) ⇌2SO3( g) is : (1) 4.9 (2) 49 (3) 41.6 (4) 416

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.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. 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.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.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. 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

Q38.The difference in energy between the actual structure and the lowest energy resonance structure for the given compound is: (1) electromeric energy (2) resonance energy (3) ionization energy (4) hyperconjugation energy JEE Main 2024 (29 Jan Shift 1) JEE Main Previous Year Paper

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.The quantity which changes with temperature is: (1) Molarity (2) Mass percentage (3) Molality (4) Mole fraction

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.How can an electrochemical cell be converted into an electrolytic cell? (1) Applying an external opposite potential lower (2) Reversing the flow of ions in salt bridge. than E0 cell. (3) Applying an external opposite potential greater (4) Exchanging the electrodes at anode and cathode. than E0 cell-

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

Q38.Chromatographic technique/s based on the principle of differential adsorption is/are A. Column chromatography B. Thin layer chromatography C. Paper chromatography Choose the most appropriate answer from the options given below: (1) B only (2) A only (3) A & B only (4) C only

Q38.Common name of Benzene - 1, 2 - diol is - (1) catechol (2) o-cresol (3) quinol (4) resorcinol

Q39.The set of meta directing functional groups from the following sets is: (1) -CN, - NH2, - NHR, - OCH3 (2) -NO2, - NH2, - COOH, - COOR (3) -NO2, - CHO, - SO3H, - COR (4) -CN, - CHO, - NHCOCH3, - COOR

Q39.Anomalous behaviour of oxygen is due to its (1) Large size and high electronegativity (2) Small size and low electronegativity (3) Small size and high electronegativity (4) Large size and low electronegativity

Q39.The fragrance of flowers is due to the presence of some steam volatile organic compounds called essential oils. These are generally insoluble in water at room temperature but are miscible with water vapour in the vapour phase. A suitable method for the extraction of these oils from the flowers is: (1) crystallisation (2) distillation under reduced pressure (3) distillation (4) steam distillation

Q39.The Molarity (M) of an aqueous solution containing 5.85 g of NaCl in 500 mL water is : (Given : Molar Mass Na : 23 and Cl : 35.5gmol−1 ) (1) 2 (2) 20 (3) 4 (4) 0.2

Q39.The adsorbent used in adsorption chromatography is/are - A. silica gel B. alumina C. quick lime D. magnesia Choose the most appropriate answer from the options given below : (1) A only (2) B only (3) C and D only (4) A and B only

Q40.Major product of the following reaction is: JEE Main 2024 (31 Jan Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q40.Ionic reactions with organic compounds proceed through: (A) Homolytic bond cleavage (B) Heterolytic bond cleavage (C) Free radical formation (D) Primary free radical (E) Secondary free radical Choose the correct answer from the options given below: (1) (A) only (2) (C) only (3) (B) only (4) (D) and (E) only