Practice Questions

Q47.In the following reaction, ‘A’ is JEE Main 2023 (01 Feb Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q47.A' and 'B' formed in the following set of reactions are: (1) (2) (3) (4) Q48.'R' formed in the following sequence of reaction is: JEE Main 2023 (24 Jan Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q47.Match List-I and List-II List-I List-II Solvent molecules pass through semi permeable membrane A.Osmosis I. towards solvent side. Movement of charged colloidal particles under the influence Reverse B. II. of applied electric potential towards oppositely charged osmosis electrodes JEE Main 2023 (29 Jan Shift 2) JEE Main Previous Year Paper molecules pass through semi permeable membrane C. Electro osmosis III.Solvent towards solution side D.Electrophoresis IV. Dispersion medium moves in an electric field. Choose the correct answer from the options given below: (1) A-I, B-III, C-IV, D-II (2) A-III, B-I, C-IV, D-II (3) A-III, B-I, C-II, D-IV (4) A-I, B-III, C-II, D-IV

Q47.Based on the given figure, the number of correct statement/s is/are JEE Main 2023 (25 Jan Shift 2) JEE Main Previous Year Paper A. Surface tension is the outcome of equal attractive and repulsion forces acting on the liquid molecule in bulk. B. Surface tension is due to uneven forces acting on the molecules present on the surface. C. The molecule in the bulk can never come to the liquid surface. D. The molecules on the surface are responsible for vapour pressure if the system is a closed system.

Q47.The major product formed in the following reaction is JEE Main 2023 (06 Apr Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q48. In the above conversion the correct sequence of reagents to be added is (1) (i) KMnO4, (ii) Br2 / Fe, (iii) Fe /H+, (iv) Cl2(2) (i) Br2 / Fe, (ii) Fe /H+, (iii) KMnO4, (iv) Cl2 (3) (i) Fe /H+, (ii) HONO, (iii) CuCl, (iv) KMnO4(4) (i)(v)Br2Br2/ Fe, (ii) Fe /H+, (iii) HONO, (iv) CuCl (v) KM

Q48.Which of the following represents the Freundlich adsorption isotherms? (A) JEE Main 2023 (08 Apr Shift 1) JEE Main Previous Year Paper (B) (C) (D) Choose the correct answer from the options given below: (1) A, C, D only (2) A, B only (3) B, C, D only (4) A, B, D only

Q48.For a chemical reaction A + B → Product, the order is 1 with respect to A and B. Rate [A] [B] mol L−1 S−1 mol L−1 mol L−1 0. 10 20 0. 5 0. 40 x 0. 5 0. 80 40 y What is the value of x and y? (1) 160 and 4 (2) 80 and 4 (3) 80 and 2 (4) 40 and 4 JEE Main 2023 (11 Apr Shift 2) JEE Main Previous Year Paper

Q48.The number of incorrect statement/s from the following is/are A. Water vapours are adsorbed by anhydrous calcium chloride. B. There is a decrease in surface energy during adsorption. C. As the adsorption proceeds, ΔH becomes more and more negative. D. Adsorption is accompanied by decrease in entropy of the system.

Q48.Following figure shows dependence of molar conductance of two electrolytes on concentration. Λ0m is the limiting molar conductivity. The number of Incorrect statement(s) from the following is _____ (A) Λ0m for electrolyte A is obtained by extrapolation (B) For electrolyte B, Λm Vs √c graph is a straight line with intercept equal to Λ0m (C) At infinite dilution, the value of degree of dissociation approach zero for electrolyte B . (D) Λm for any electrolyte A or B can be calculated using λ° for individual ions.

Q48.Isomeric amines with molecular formula C8H11N give the following tests IsomerP ⇒ Can be prepared by Gabriel phthalimide synthesis IsomerQ ⇒ Reacts with Hinsberg’s reagent to give solid insoluble in NaOH IsomerR ⇒ Reacts with HONO followed by β-naphthol in NaOH to give red dye. IsomersP, Q and R respectively are JEE Main 2023 (10 Apr Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q48.For lead storage battery pick the correct statements A. During charging of battery, PbSO4 on anode is converted into PbO2 B. During charging of battery, PbSO4 on cathode is converted into PbO2 C. Lead storage battery consists of grid of lead packed with PbO2 as anode D. Lead storage battery has ~38% solution of sulphuric acid as an electrolyte Choose the correct answer from the options given below: (1) A, B, D only (2) B, C, D only (3) B, C only (4) B, D only

Q48.In the reaction given below The product ‘X’ is : (1) (2) (3) (4)

Q48.The standard reduction potentials at 295 K for the following half cells are given below: NO3−+ 4H+ + 3e−→NO(g) + 2H2O Eo = 0. 97 V V2+(aq) + 2e−→V(s) Eo = −1. 19 V Fe3+(aq) + 3e−→Fe(s) Eo = −0. 04 V Ag+(aq) + e−→Ag(s) Eo = 0. 80 V Au3+(aq) + 3e−→Au(s) Eo = 1. 40 V The number of metal(s) which will be oxidised by NO3− in aqueous solution is _____.

Q48. Compound P is neutral, Q gives effervescence with NaHCO3 while R reacts with Hinsberg’s reagent to give solid soluble in NaOH . Compound P is (1) (2) (3) (4)

Q48.Compound A from the following reaction sequence is : (1) Benzoic Acid (2) Aniline (3) Salicylic Acid (4) Phenol JEE Main 2023 (13 Apr Shift 2) JEE Main Previous Year Paper

Q48.The graph which represents the following reaction is: OH− (C6H5)3C −Cl Pyridine (C6H5)3C −OH (1) (2) (3) (4)

Q48.The number of statement/s which are the characteristics of physisorption is ___________. A. It is highly specific in nature B. Enthalpy of adsorption is high C. It decreases with increase in temperature D. It results into unimolecular layer E. No activation energy is needed

Q48.An organic compound undergoes first order decomposition. If the time taken for the 60% decomposition is 540 s, then the time required for 90% decomposition will be is _____ s. (Nearest integer). Given : ln 10 = 2. 3; log 2 = 0. 3

Q48.Compound A reacts with NH4 Cl and forms a compound B. Compound B reacts with H2O and excess of CO2 to form compound C which on passing through or reaction with saturated NaCl solution forms sodium hydrogen carbonate. Compound A. B and C, are respectively. (1) CaCl2, NH3, NH4 HCO3 (2) CaCl2, NH+4 , (NH4)2 CO3 (3) Ca(OH)2, NH3, NH4 HCO3 (4) Ca(OH)2, NH+4 , (NH4)2 CO3

Q49.For certain chemical reaction X →Y , the rate of formation of product is plotted against the time as shown in the figure. The number of Correct statement/s from the following is _____ (A) Over all order of this reaction is one (B) Order of this reaction can't be determined (C) In region-I and III, the reaction is of first and zero order respectively (D) In region-II, the reaction is of first order (E) In region-II, the order of reaction is in the range of 0. 1 to 0. 9. JEE Main 2023 (29 Jan Shift 1) JEE Main Previous Year Paper

Q49.The correct representation in six membered pyranose form for the following sugar [X] is JEE Main 2023 (01 Feb Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q49.Total number of acidic oxides among N2O3, NO2, N2O, Cl2 O7, SO2, CO, CaO, Na2 O and NO is _____ .

Q49.Compound X undergoes following sequence of reactions to give the Lactone Y. (1) (2) (3) (4)

Q49.In the wet tests for identification of various cations by precipitation, which transition element cation doesn't belong to group IV in qualitative inorganic analysis? (1) Fe3 + (2) Zn2 + (3) Co2 + (4) Ni2 +