Practice Questions

Q31.The correct order of ionic size of N3−, Na+, F−, Mg2+ and O2− is : (1) Mg2+ < Na+ < F−< O2−< N3− (2) N3−< O2−< F < Na+ < Mg2+ (3) F−< Na+ < O2−< Mg2+ < N3− (4) Na+ < F−< Mg2+ < O2−< N3−

Q31.Using the rules for significant figures, the correct answer for the expression 0.02858×0.112 will be: 0.5702 (1) 0. 005613 (2) 0. 00561 (3) 0. 0056 (4) 0. 006

Q31.SO2Cl2 on reaction with excess of water results into acidic mixture SO2Cl2 + 2H2O →H2SO4 + 2HCl 16 moles of NaOH is required for the complete neutralisation of the resultant acidic mixture. The number of moles of SO2Cl2 used is (1) 16 (2) 8 (3) 4 (4) 2

Q31.The pair, in which ions are isoelectronic with Al3 + is (1) Br- and Be2 + (2) Cl- and Li+ (3) S2 - and K+ (4) O2 - and Mg2 +

Q32.Consider the following pairs of electrons (A) (a) n = 3, l = 1, ml = 1, ms = + 12 (b) n = 3, l = 2, ml = 1, ms = + 21 (B) (a) n = 3, l = 2, ml = −2, ms = −12 (b) n = 3, l = 2, ml = −1, ms = −12 (C) (a) n = 4, l = 2, ml = 2, ms = + 21 (b) n = 3, l = 2, ml = 2, ms = + 21 The pairs of electrons present in degenerate orbitals is/are (1) Only (A) (2) Only (B) (3) Only (C) (4) (B) and (C) both

Q32.What is the correct oder of electron gain enthalpy of Cl, F, Te, Po (1) F > Cl > Te > Po (2) Cl > F > Te > Po (3) Te > Po > Cl > F (4) Po > Te > F > Cl

Q32.Which of the following is a metalloid? (1) Sc (2) Pb (3) Bi (4) Te

Q32.The metal that has very low melting point and its periodic position is closer to a metalloid is (1) Al (2) Ga (3) Se (4) In

Q32.The energy of one mole of photons of radiation of wavelength 300 nm is (Given : h = 6. 63 × 10−34 J s, NA = 6. 02 × 1023 mol−1c = 3 × 108 m s−1 ) (1) 235 kJ mol−1 (2) 325 kJ mol−1 (3) 399 kJ mol−1 (4) 435 kJ mol−1

Q32.If the radius of the 3nd Bohr's orbit of hydrogen atom is r3 and the radius of 4th Bohr's orbit is r4 . Then (1) r4 = 169 r3 (2) r4 = 169 r3 (3) r4 = 34 r3 (4) r4 = 34 r3

Q32.Which of the following sets of quantum numbers is not allowed? JEE Main 2022 (25 Jul Shift 1) JEE Main Previous Year Paper 1 1 (1) n = 3, l = 2, ml = 0, s = + 2 (2) n = 3, l = 2, ml = - 2, s = + 2 (3) n = 3, l = 3, ml = - 3, s = - 1 (4) n = 3, l = 0, ml = 0, s = - 1 2 2

Q32.The correct decreasing order for metallic character is (1) Na > Mg > Be > Si > P (2) P > Si > Be > Mg > Na (3) Si > P > Be > Na > Mg (4) Be > Na > Mg > Si > P JEE Main 2022 (28 Jul Shift 2) JEE Main Previous Year Paper

Q33. Ka1, Ka2 and Ka3 are the respective ionization constants for the following reactions (a), (b) and (c). (a) H2C2O4 ⇌H+ + HC2 O−4 (b) HC2 O−4 ⇌H+ + HC2 O2−4 (c) H2C2O4 ⇌2H+ + C2O2−4 The relationship between Ka1, Ka2 and Ka3 is given as (1) Ka3 = Ka1 + Ka2 (2) Ka3 = Ka1 Ka2 (3) Ka3 = Ka1 −Ka2 (4) Ka3 = Ka1 × Ka2

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.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.Match List-I with List-II List-I List-II A ΨMO = ΨA −ΨB I Dipole moment B μ = Q × r II Bonding molecular orbital C Nb−Na III Anti-bonding molecualr orbital 2 D ΨMO = ΨA + ΨB IV Bond order (1) A −II, B −I, C −IV, D −III (2) A −III, B −IV, C −I, D −II (3) A −III, B −I, C −IV, D −II (4) A −III, B −IV, C −II, D −I JEE Main 2022 (27 Jul Shift 2) JEE Main Previous Year Paper

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

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

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

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

Q34.Arrange the following in the decreasing order of their covalent character : JEE Main 2022 (29 Jun Shift 1) JEE Main Previous Year Paper (A) LiCl (B) NaCl (C) KCl (D) CsCl Choose the most appropriate answer from the options given below (1) (A) > (C) > (B) > (D) (2) (B) > (A) > (C) > (D) (3) (A) > (B) > (C) > (D) (4) (A) > (B) > (D) > (C)

Q35.Boiling of hard water is helpful in removing the temporary hardness by converting calcium hydrogen carbonate and magnesium hydrogen carbonate to (1) CaCO3 and Mg (OH)2 (2) CaCO3 and MgCO3 (3) Ca (OH)2 and MgCO3 (4) Ca (OH)2 and Mg (OH)2

Q35.Which amongst the following is not a pesticide? JEE Main 2022 (28 Jun Shift 1) JEE Main Previous Year Paper (1) DDT (2) Dieldrin (3) Organophosphate (4) Sodium Arsenite

Q35.The reaction of zinc with excess of aqueous alkali, evolves hydrogen gas and gives (1) Zn (OH)2 (2) ZnO (3) [Zn (OH)4]2− (4) [ZnO2]2−