Practice Questions

Q32.In which one of the following sets all species show disproportionation reaction? (1) ClO4- , MnO4- , ClO2- and F2 (2) MnO42 - , ClO2- , Cl2 and Mn3 + (3) Cr2O72 - , MnO4- , ClO2- and Cl2 (4) ClO2- , F2, MnO4- and Cr2O72 -

Q32.The compound/s which will show significant intermolecular H -bonding is/are : (1) (a), (b) and (c) (2) (b) only (3) (c) only (4) (a) and (b) only

Q32.The first ionization energy of magnesium is smaller, as compared to that of elements X and Y , but higher than that of Z. The elements X, Y and Z , respectively, are : (1) chlorine, lithium and sodium (2) argon, lithium and sodium (3) argon, chlorine and sodium (4) neon, sodium and chlorine

Q32.In polythionic acid, H2 SxO6(x = 3 to 5) the oxidation state(s) of sulphur is/are: (1) +6 only (2) +5 only (3) 0 and +5 only (4) +3 and +5 only

Q32.The CORRECT order of first ionisation enthalpy is: (1) Mg < S < Al < P (2) Mg < Al < S < P (3) Al < Mg < S < P (4) Mg < Al < P < S

Q32.The solubility of Ca (OH)2 in water is : [Given : The solubility product of Ca (OH)2 in water = 5. 5 × 10−6 ] (1) 1. 77 × 10−2 (2) 1. 77 × 10−6 (3) 1. 11 × 10−2 (4) 1. 11 × 10−6

Q32.Match List − I with List − II : List −I List −II (a) NaOH (i) Acidic (b) Be(OH)2 (ii) Basic (c) Ca(OH)2 (iii) Amphoteric (d) B(OH)3 (e) Al(OH)3 Choose the most appropriate answer from the options given below (1) (a) −(ii), (b) −(ii), (c) −(iii), (d) −(ii), (e) (2)−(iii)(a) −(ii), (b) −(iii), (c) −(ii), (d) −(i), (e) −(iii) (3) (a) −(ii), (b) −(ii), (c) −(iii), (d) −(i), (e) −(iii)(a)(4) −(ii), (b) −(i), (c) −(ii), (d) −(iii), (e) −(iii)

Q32.Which of the following are isostructural pairs? A. SO42 - and CrO4 2 - B. SiCl4 and TiCl4 C. NH3 and NO3- D. BCl3 and BrCl3 JEE Main 2021 (24 Feb Shift 1) JEE Main Previous Year Paper (1) A and C only (2) B and C only (3) A and B only (4) C and D only

Q32.A central atom in a molecule has two lone pairs of electrons and forms three single bonds. The shape of this molecule is (1) see-saw (2) planar triangular (3) T-shaped (4) trigonal pyramidal

Q32.Which pair of oxides is acidic in nature? (1) B2O3, CaO (2) N2O, BaO (3) CaO, SiO2 (4) B2O3, SiO2

Q33.In the following the correct bond order sequence is: (1) O2−2 > O+2 > O−2 > O2 (2) O+2 > O−2 > O2−2 > O2 (3) O+2 > O2 > O−2 > O2−2 (4) O2 > O−2 > O2−2 > O+2

Q33.The correct shape and I −I −I bond angles respectively in I−3 ion are: (1) T-shaped; 180° and 90° (2) Distorted trigonal planar; 135° and 90° (3) Trigonal planar; 120° (4) Linear; 180°

Q33.The hybridisations of the atomic orbitals of nitrogen in NO−2 , NO+2 and NH+4 respectively are. (1) sp3, sp2 and sp (2) sp, sp2 and sp3 (3) sp3, sp and sp2 (4) sp2, sp and sp3

Q33.Monomer of Novolac is : (1) 3-Hydroxybutanoic acid. (2) 1, 3 -Butadiene and styrene. (3) phenol and melamine. (4) o-Hydroxymethylphenol.

Q33.The functional groups that are responsible for the ion-exchange property of cation and anion exchange resins, respectively, are : (1) −SO3 H and −NH2 (2) −SO3 H and −COOH (3) −NH2 and −COOH (4) −NH2 and −SO3 H

Q33.The bond order and magnetic behaviour of O−2 ion are, respectively : (1) 1. 5 and diamagnetic. (2) 1. 5 and paramagnetic. (3) 2 and diamagnetic. (4) 1 and paramagnetic

Q33.The oxide that gives H2O2 most readily on treatment with H2O is : (1) Na2 O2 (2) BaO2. 8H2O (3) SnO2 (4) PbO2 JEE Main 2021 (27 Aug Shift 2) JEE Main Previous Year Paper

Q33.Which of the following compound CANNOT act as a Lewis base? (1) NF3 (2) PCl5 (3) SF4 (4) ClF3

Q33.The number of neutrons and electrons, respectively, present in the radioactive isotope of hydrogen is :- (1) 1 and 1 (2) 3 and 1 (3) 2 and 1 (4) 2 and 2

Q33.Which one of the following methods is most suitable for preparing deionized water? (1) Synthetic resin method (2) Calgon's method (3) Clark's method (4) Permutit method

Q33.Match List-I with List-II List - I List - II (Elements) (Properties) (a) Ba (i) Organic solvent soluble compounds (b) Ca (ii) Outer electronic configuration 6 s2 (c) Li (iii) Oxalate insoluble in water (d) Na (iv) Formation of very strong monoacidic base Choose the correct answer from the options given below: (1) (a)-(ii), (b)-(iii), (c)-(i) and (d)-(iv) (2) (a)-(iv), (b)-(i), (c)-(ii) and (d)-(iii) (3) (a)-(iii), (b)-(ii), (c)-(iv) and (d)-(i) (4) (a)-(i), (b)-(iv), (c)-(ii) and (d)-(iii)

Q33.Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : In TlI3, isomorphous to CsI3 , the metal is present in +1 oxidation state. Reason R : Tl metal has fourteen f electrons in its electronic configuration. In the light of the above statements, choose the most appropriate answer from the options given below: JEE Main 2021 (26 Feb Shift 2) JEE Main Previous Year Paper (1) A is correct but R is not correct (2) Both A and R are correct and R is the correct explanation of A (3) A is not correct but R is correct (4) Both A and R are correct but R is NOT the correct explanation of A

Q33.A group 15 element, which is a metal and forms a hydride with strongest reducing power among group 15 hydrides. The element is : (1) Sb (2) P (3) As (4) Bi

Q33.(A) HOCl + H2O2 →H3O+ + Cl- + O2 (B) I2 + H2O2 + 2OH- →2I- + 2H2O + O2 Choose the correct option. (1) H2O2 act as oxidizing and reducing agent (2) H2O2 acts as oxidising agent in equations ( A ) respectively in equations ( A ) and ( B ) . and ( B ) . (3) H2O2 acts as reducing and oxidising agent (4) H2O2 acts as reducing agent in equations ( A ) respectively in equations ( A ) and ( B ) . and ( B ) .

Q33.Deuterium resembles hydrogen in properties but: JEE Main 2021 (27 Aug Shift 1) JEE Main Previous Year Paper (1) reacts vigorously than hydrogen (2) reacts just as hydrogen (3) emits β+ particles (4) reacts slower than hydrogen