Practice Questions

Q31.A certain orbital has no angular nodes and two radial nodes. The orbital is: (1) 2s (2) 3s (3) 3p (4) 2p JEE Main 2021 (18 Mar Shift 1) JEE Main Previous Year Paper

Q31.The ionic radii of K+, Na+, Al3 + and Mg2 + are in the order : (1) Na+ < K+ < Mg2 + < Al3 + (2) Al3 + < Mg2 + < K+ < Na+ (3) Al3 + < Mg2 + < Na+ < K+ (4) K+ < Al3 + < Mg2 + < Na+

Q31.Number of paramagnetic oxides among the following given oxides is ___________ . Li2O, CaO, Na2O2, KO2, MgO and K2O (1) 1 (2) 3 (3) 0 (4) 2

Q31.Consider the elements Mg, Al, S, P and Si, the correct increasing order of their first ionisation enthalpy is: (1) Al < Mg < Si < S < P (2) Al < Mg < S < Si < P (3) Mg < Al < Si < P < S (4) Mg < Al < Si < S < P

Q31.The correct order of ionic radii for the ions, P3−, S2−, Ca2+, K+, Cl− is : (1) P3−> S2−> Cl−> K+ > Ca2+ (2) P3−> S2−> Cl−> Ca2+ > K+ (3) Cl−> S2−> P3−> Ca2+ > K+ (4) K+ > Ca2+ > P3−> S2−> Cl−

Q31.Outermost electronic configuration of a group 13 element, E, is 4 s2, 4p1. The electronic configuration of an element of p-block period-five placed diagonally to element, E is: (1) [Kr]3 d104 s24p2 (2) [Ar]3 d104 s24p2 (3) [Xe]5 d106 s26p2 (4) [Kr]4 d105 s25p2

Q31.The incorrect expression among the following is : ΔH° - TΔS° (1) For isothermal process (2) lnK = RT Vf wreversible = - nRT ln Vi ΔGSystem / RT (3) = - T (at constant P) (4) K = e-ΔG° ΔSTotal

Q31.The orbital having two radial as well as two angular nodes is: (1) 5d (2) 4d (3) 4f (4) 3p

Q31.Which among the following species has unequal bond lengths? (1) SiF4 (2) SF4 (3) XeF4 (4) BF4

Q31.The absolute value of the electron gain enthalpy of halogens satisfies: (1) I > Br > Cl > F (2) Cl > Br > F > I (3) Cl > F > Br > I (4) F > Cl > Br > I

Q31.Amongst the following, the linear species is: (1) NO2 (2) Cl2 O (3) O3 (4) N−3 JEE Main 2021 (17 Mar Shift 2) JEE Main Previous Year Paper

Q32.Which one of the following species doesn't have a magnetic moment of 1. 73 BM, (spin only value)? (1) O+2 (2) CuI (3) [Cu (NH3)4] Cl2 (4) O−2

Q32.The ionic radii of F− and O2− respectively are 1. 33 A and 1. 4A , while the covalent radius of N is 0. 74A The correct statement for the ionic radius of N3− from the following is : (1) It is smaller than F− and N (2) It is bigger than O2− and F− (3) It is bigger than F− and N, but smaller than of (4) It is smaller than O2− and F− , but bigger than of O2− N

Q32.Hydrogen peroxide reacts with iodine in basic medium to give : (1) IO- (2) IO3- (3) I- (4) IO4-

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.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.Given below are two statements: Statement I : H2O2 can act as both oxidising and reducing agent in basic medium. Statement II : In the hydrogen economy, the energy is transmitted in the form of dihydrogen. In the light of the above statements, choose the correct answer from the options given below: (1) Both statement I and statement II are false (2) Both statement I and statement II are true (3) Statement I is true but statement II is false (4) Statement I is false but statement II is true

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.Match List-I with List-II List - I List - II (Elements) (Properties) (a) SF4 (i) sp3 d2 (b) IF5 (ii) d2 sp3 (c) NO+2 (iii) sp3 d (d) NH+4 (iv) sp3 (v) sp Choose the correct answer from the options given below: (1) (a)-(i), (b)-( ii), (c)-(v) and (d)-(iii) (2) (a)-(ii), (b)-(i), (c)-(iv) and (d)-(v) (3) (a)-(iii), (b)-(i), (c)-(v) and (d)-(iv) (4) (a)-(iv), (b)-(iii), (c)-(ii) and (d)-(v)

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.The interaction energy of London forces between two particles is proportional to rx , where r is the distance between the particles. The value of x is : (1) 6 (2) −6 (3) 3 (4) −3

Q32.Match List- I with List- II. List- I List- II Electronic configuration of elements ΔiH in kJ mol−1 (a) 1s22s2 (p) 801 (b) 1s22s22p4 (q) 899 (c) 1s22s22p3 (r) 1314 (d) 1s22s22p1 (s) 1402 Choose the most appropriate answer from the options given below: (1) (a) →(q), (b) →(r), (c) →(s), (d) →(p) (2) (a) →(p), (b) →(r), (c) →(s), (d) →(q) (3) (a) →(p), (b) →(s), (c) →(r), (d) →(q) (4) (a) →(s), (b) →(p), (c) →(q), (d) →(r)

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

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 -