Practice Questions

Q31.Identify the correct statements about p-block elements and their compounds. (A) Non metals have higher electronegativity than metals. (B) Non metals have lower ionisation enthalpy than metals. (C) Compounds formed between highly reactive nonmetals and highly reactive metals are generally ionic. (D) The non-metal oxides are generally basic in nature. (E) The metal oxides are generally acidic or neutral in nature. Choose the correct answer from the options given below : (1) (B) and (D) only (2) (A) and (C) only (3) (D) and (E) only (4) (B) and (E) only

Q31.The number of radial node/s for 3p orbital is: (1) 1 (2) 4 (3) 2 (4) 3

Q32.Which of the following electronic configuration would be associated with the highest magnetic moment ? (1) [Ar] 3d7 (2) [Ar] 3d8 (3) [Ar] 3d3 (4) [Ar] 3d6

Q32.The four quantum numbers for the electron in the outer most orbital of potassium (atomic no. 19) are (1) n = 4, l = 2, m = −1, s = + 1 (2) n = 4, l = 0, m = 0, s = + 1 2 2 1 1 (3) n = 3, l = 0, m = −1, s = + (4) n = 2, l = 0, m = 0, s = + 2 2

Q32.The correct order of the first ionization enthalpy is (1) Al > Ga > Tl (2) Ga > Al > B (3) Tl > Ga > Al (4) B > Al > Ga

Q32.The incorrect postulates of the Dalton's atomic theory are : (A) Atoms of different elements differ in mass. (B) Matter consists of divisible atoms. (C) Compounds are formed when atoms of different element combine in a fixed ratio. (D) All the atoms of given element have different properties including mass. (E) Chemical reactions involve reorganisation of atoms. Choose the correct answer from the options given below : (1) (C), (D), (E) only (2) (B), (D) only (3) (A), (B), (D) only (4) (B), (D), (E) only

Q32.The electronic configuration of Einsteinium is : (Given atomic number of Einsteinium = 99) (1) [Rn]5f 106 d∘7 s2 (2) [Rn]5f 136 d∘7 s2 (3) [Rn]5f 116 d∘7 s2 (4) [Rn]5f 126 d∘7 s2

Q32.The ratio KP for the reaction : CO(g) + 12 O2( g) ⇌CO2( g) is : KC (1) 1 (2) (RT)1/2 √RT (3) RT (4) 1

Q32.The correct order of first ionization enthalpy values of the following elements is : (A) O (B) N (C) Be (D) F (E) B Choose the correct answer from the options given below : (1) E < C < A < B < D (2) C < E < A < B < D (3) B < D < C < E < A (4) A < B < D < C < E

Q32.The element having the highest first ionization enthalpy is (1) Si (2) Al (3) N (4) C

Q32.In case of isoelectronic species the size of F–, Ne and Na+ is affected by: (1) Principal quantum number n (2) None of the factors because their size is the same (3) Electron-electron interaction in the outer orbitals (4) Nuclear charge z

Q32.The electron affinity value are negative for A. Be →Be− B. N →N− C. O →O2− D. Na →Na− E. Al →Al− Choose the most appropriate answer from the options given below : (1) D and E only (2) A, B and C only (3) A and D only (4) A, B, D and E only

Q32.The molecular formula of second homologue in the homologous series of mono carboxylic acids is _________. (1) C3H6O2 (2) C2H4O2 (3) CH2O (4) C2H2O2

Q32.The shape of carbocation is : (1) diagonal pyramidal (2) trigonal planar (3) tetrahedral (4) diagonal

Q32. List - I List - II (Elements) (Properties in their respective groups) A. Cl, S I. Elements with highest electronegativity B. Ge, As II. Elements with largest atomic size Match List I with List II Choose Elements which show properties of both C. Fr, Ra III. metals and non-metal Elements with highest negative electron D. F, O IV. gain enthalpy the correct answer from the options given below: (1) A-II, B-I, C-IV, D-III (2) A-III, B-II, C-I, D-IV (3) A-IV, B-III, C-II, D-I (4) A-II, B-III, C-IV, D-I

Q32.The linear combination of atomic orbitals to form molecular orbitals takes place only when the combining atomic orbitals A. have the same energy B. have the minimum overlap C. have same symmetry about the molecular axis D. have different symmetry about the molecular axis Choose the most appropriate from the options given below: (1) A, B, C only (2) A and C only (3) B, C, D only (4) B and D only

Q33.Match List - I with List - II. List - I List - II Reaction Type of redox reaction (A) N2( g) + O2( g) →2NO(g) (I) Decomposition Choose the (B) 2 Pb(NO3)2( s) →2PbO(s) + 4NO2( g) + O2( g) (II) Displacement (C) 2Na(s) + 2H2O(I) →2NaOH(aq. + H2( g) (III) Disproportionation (D) 2NO2( g ) + 2−OH(aq. ) →NO−2( aq. ) + NO−3( aq. ) + H2O(l) (IV) Combination correct answer from the options given below : (1) (A)-(II), (B)-(III), (C)-(IV), (D)-(I) (2) (A)-(III), (B)-(II), (C)-(I), (D)-(IV) (3) (A)-(IV), (B)-(I), (C)-(II), (D)-(III) (4) (A)-(I), (B)-(II), (C)-(III), (D)-(IV)

Q33.Match List - I with List-II List I (Molecule) List II (Shape) A. BrF5 i. T-shape B. H2O ii. See saw C. ClF3 iii. Bent D. SF4 iv. Square pyramidal (1) (A)-I, (B)-II, (C)-IV, (D)-III (2) (A) -II, (B)-I, (C)-III, (D)-IV (3) (A)-III, (B)-IV, (C)-I, (D)-II (4) (A)-IV, (B)-III, (C)-I, (D)-II

Q33.Consider the following elements. Which of the following is/are true about A', B', C' and D' ? A. Order of atomic radii: B' < A' < D' < C' B. Order of metallic character : B' < A' < D' < C' C. Size of the element : D' < C' < B' < A' D. Order of ionic radii : B'+ < A'+ < D'+ < C'+ Choose the correct answer from the options given below: (1) A only (2) A, B and D only (3) A and B only (4) B, C and D only

Q33.Choose the polar molecule from the following : (1) CCl4 (2) CO2 (3) CH2 = CH2 (4) CHCl3

Q33. List - I List - II (A) ICl (I) T - shape Match List I with List II (B) ICl3 (II) pyramidal Choose the correct answer from the (C) ClF5 (III) Pentagonal bipyramidal (D) IF7 (IV) Linear options given below : (1) (A)-(IV), (B)-(I), (C)-(II), (D)-(III) (2) (A)-(I), (B)-(IV), (C)-(III), (D)-(II) (3) (A)-(IV), (B)-(III), (C)-(II), (D)-(I) (4) (A)-(I), (B)-(III), (C)-(II), (D)-(IV)

Q33.In which one of the following pairs the central atoms exhibit sp2 hybridization ? (1) H2O and NO2 (2) BF3 and NO−2 (3) NH−2 and H2O (4) NH−2 and BF3 JEE Main 2024 (09 Apr Shift 1) JEE Main Previous Year Paper

Q33.Which of the following is not correct? (1) ΔG is negative for a spontaneous reaction (2) ΔG is positive for a spontaneous reaction (3) ΔG is zero for a reversible reaction (4) ΔG is positive for a non-spontaneous reaction

Q33. List-I List-II (Molecule) (Shape) A. NH3 I. Square pyramid Match List I with List II Choose the correct answer B. BrF5 II. Tetrahedral C. PCl5 III. Trigonal pyramidal D. CH4 IV. Trigonal bipyramidal from the options given below: (1) A-II, B-IV, C-I, D-III (2) A-III, B-I, C-IV, D-II (3) A-IV, B-III, C-I, D-II (4) A-III, B-IV, C-I, D-II JEE Main 2024 (08 Apr Shift 1) JEE Main Previous Year Paper

Q33.Arrange the bonds in order of increasing ionic character in the molecules. LiF, K2O, N2, SO2 and ClF3 . (1) ClF3 < N2 < SO2 < K2O < LiF (2) LiF < K2O < ClF3 < SO2 < N2 (3) N2 < SO2 < ClF3 < K2O < LiF (4) N2 < ClF3 < SO2 < K2O < LiF