Practice Questions

Q33.Which of the following relation is not correct? JEE Main 2022 (28 Jul Shift 1) JEE Main Previous Year Paper (1) ΔH = ΔU - PΔV (2) ΔU = q + W (3) ΔSsys + ΔSsurr ≥0 (4) ΔG = ΔH - TΔS

Q33.Given below are the quantum numbers for 4 electrons. 1 A. n = 3, l = 2, m1 = 1, ms = + 2 1 B. n = 4, l = 1, m1 = 0, ms = + 2 C. n = 4, l = 2, m1 = - 2, ms = - 1 2 1 D. n = 3, l = 1, m1 = - 1, ms = + 2 The correct order of increasing energy is (1) D < B < A < C (2) D < A < B < C (3) B < D < A < C (4) B < D < C < A Q34.200 mL of 0 . 01MHCl is mixed with 400 mL of 0 . 01MH2SO4. The pH of the mixture is (1) 1 . 14 (2) 1 . 78 (3) 2 . 34 (4) 3 . 02

Q33.Metals generally melt at very high temperatures, Among the following which one has the highest melting point? (1) Ga (2) Ag (3) Hg (4) Cs

Q33.The IUPAC nomenclature of an element with electronic configuration Rn5f146d17s2 is (1) Unnilunium (2) Unnilbium (3) Unniltrium (4) Unnilquadium Q34.20 mL of 0 . 1M NH4OH is mixed with 40 mL of 0 . 05 M HCl. The pH of the mixture is nearest to: (Given: KbNH4OH = 1 × 10-5, log2 = 0 . 30, log3 = 0 . 48, log5 = 0 . 69, log7 = 0 . 84, log11 = 1 . 04) (1) 3 . 2 (2) 4 . 2 (3) 5 . 2 (4) 6 . 2

Q33.The incorrect statement is (1) The first ionization enthalpy of K is less than that (2) Xe does not have the lowest first ionization of Na and Li enthalpy in its group (3) The first ionization enthalpy of element with (4) The first ionization enthalpy of Ga is higher than atomic number 37 is lower than that of the that of the d-block element with atomic number element with atomic number 38 . 30 .

Q33.Which of the following pair of molecules contain odd electron molecule and an expanded octet molecule? (1) BCl3 and SF6 (2) NO and H2 SO4 (3) SF6 and H2 SO4 (4) BCl3 and NO

Q33.Arrange the following in increasing order of their covalent character. (A) CaF2 (B) CaCl2 (C) CaBr2 (D) CaI2 JEE Main 2022 (26 Jul Shift 2) JEE Main Previous Year Paper Choose the correct answer from the options given below. (1) B < A < C < D (2) A < B < C < D (3) A < B < D < C (4) A < C < B < D

Q33.The correct order of increasing intermolecular hydrogen bond strength is (1) HCN < H2O < NH3 (2) HCN < CH4 < NH3 (3) CH4 < HCN < NH3 (4) CH4 < NH3 < HCN

Q33.The electronic configuration of Pt (atomic number 78 ) is (1) [Kr]4f 145d10 (2) [Xe]4f 145d10 (3) [Xe]4f 145d86s2 (4) [Xe]4f 145d96s1

Q33.Number of electron deficient molecules among the following PH3, B2H6, CCl4, NH3, LiH and BCl3 is (1) 0 (2) 1 (3) 2 (4) 3

Q33.Which of the following structures are aromatic in nature? (1) A, B, C & D (2) Only A & B (3) Only A & C (4) Only B, C & D

Q33.Which of the given reactions is not an example of disproportionation reaction? (1) 2H2O2 →2H2O + O2 (2) 2 NO2 + H2O →HNO3 + HNO2 (3) MnO−4 + 4H+ + 3e−→MnO2 + 2H2O (4) 3 MnO4 2−+ 4H+ →2 MnO4 −+ MnO2 + 2H2O

Q34.The highest industrial consumption of molecular hydrogen is to produce compound of element : (1) Carbon (2) Oxygen (3) Chlorine (4) Nitrogen

Q34.Given below are two statements. Statement I : O2, Cu2+ and Fe3+ are weakly attracted by magnetic field and are magnetized in the same direction as magnetic field. Statement II : NaCl and H2O are weakly magnetized in opposite direction to magnetic field. In the light of the above statements, choose the most appropriate answer form the options given below (1) Both Statement I and Statement II are correct. (2) Both Statement I and Statement II are incorrect. (3) Statement I is correct but Statement II is (4) Statement I is incorrect but Statement II is incorrect. correct.

Q34.Consider the species CH4, NH+4 and BH−4 . Choose the correct option with respect to the there species: (1) They are isoelectronic and only two have (2) They are isoelectronic and all have tetrahedral tetrahedral structures structures (3) Only two are isoelectronic and all have (4) Only two are isoelectronic and only two have tetrahedral structures tetrahedral structures

Q34.Addition of H2 SO4 to BaO2 produces (1) BaO, SO2 and H2O (2) BaHSO4 and O2 (3) BaSO4, H2 and O2 (4) BaSO4 and H2O2

Q34.Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R Assertion A : The reduction of a metal oxide is easier if the metal formed is in liquid state than solid state. Reason R : The value of ΔGΘ becomes more on negative side as entropy is higher in liquid state than solid state. In the light of the above statements. Choose the most appropriate answer from the options given below (1) Both A and R are correct and R is the correct (2) Both A and R are correct but R is NOT the explanation of A correct explanation of A (3) A is correct but R is not correct (4) A is not correct but R is correct

Q34.Which one of the following is an example of disproportionation reaction? (1) 3 MnO2−4 + 4H+ →2 MnO−4 + MnO2 + 2H2O (2) MnO−4 + 4H+ + 4e−→MnO2 + 2H2O (3) 10I−+ 2 MnO−4 + 16H+ →2 Mn2 + +8H2O + (4)5I28 MnO−4 + 3 S2O2−3 + H2O →8 MnO2 + 6 SO2−4 + 2 OH

Q34.The Ksp for bismuth sulphide Bi2S3 is 1 . 08 × 10-73. The solubility of Bi2S3 in molL-1 at 298 K is (1) 1 . 0 × 10-15 (2) 2 . 7 × 10-12 (3) 3 . 2 × 10-10 (4) 4 . 2 × 10-8

Q34.In the structure of SF4 , the lone pair of electrons on S is in. (1) Equatorial position and there are two lone pair - (2) equatorial position and there are three lone pair - bond pair repulsions at 90° . bond pair repulsions at 90° . (3) axial position and there are three lone pair - bond (4) axial position and there are two lone pair - bond pair repulsion at 90° . pair repulsion at 90° .

Q34.The metal salts formed during softening of hardwater using Clark's method are (1) CaOH2 and MgOH2 (2) CaCO3 and MgOH2 (3) CaOH2 and MgCO3 (4) CaCO3 and MgCO3

Q34.Number of lone pairs of electrons in the central atom of SCl2, O3, ClF3 and SF6 , respectively, are (1) 0, 1, 2 & 2 (2) 2, 1, 2 & 0 (3) 1, 2, 2 & 0 (4) None of these

Q34.Which of the following can be used to prevent the decomposition of H2O2 ? (1) Urea (2) Formaldehyde (3) Formic acid (4) Ethanol

Q34.Which amongst the given plots is the correct plot for pressure (p) vs density (d) for an ideal gas? (1) (2) (3) (4)

Q34.The Plot of pH -metric titration of weak base NH4 OH vs strong acid HCl looks like (1) (2) (3) (4)