Practice Questions

Q32.Match Lis-I with List-II. List-1 List-II Hexamethylenediamine A. Weak intermolecular forces of attraction I. + adipic acid B. Hydrogen bonding II. AlEt3 + TiCl4 C. Heavily branched polymer III. 2 - chloro - 1, 3 - butadiene D. High density polymer IV. Phenol + formaldehyde Choose the correct answer from the options given below (1) A-IV, B-II, C-III, D-I (2) A-IV, B-I, C-III, D-II (3) A-II, B-IV, C-I, D-III (4) A-III, B-I, C-IV, D-II

Q32.The correct increasing order of the ionic radii is (1) Cl- < Ca2 + < K+ < S2 - (2) K+ < S2 - < Ca2 + < Cl- (3) S2 - < Cl- < Ca2 + < K+ (4) Ca2 + < K+ < Cl- < S2 -

Q33.For compound having the formula GaAlCl4, the correct option from the following is (1) Ga is coordinated with CI in GaAlCl4 (2) Ga is more electronegative than AI and is present as a cationic part of the salt GaAlCl4 (3) CI forms bond with both AI and Ga in GaAlCl4 (4) Oxidation state of Ga in the salt GaAlCl4 is + 3

Q33.Order of Covalent bond; A. KF > KI; LiF > KF B. KF < KI; LiF > KF C. SnCl4 > SnCl2; CuCl > NaCl D. LiF > KF; CuCl > NaCl E. KF < KI; CuCl > NaCl (1) C, E Only (2) B, C Only (3) B, C, E Only (4) A, B Only

Q33.Which of the following statement(s) is/are correct? (A) The pH of 1 × 10–8 M HCl solution is 8. (B) The conjugate base of H2 PO4− is HPO2−4 . (C) Kw increases with increase in temperature. (D) When a solution of a weak monoprotic acid is titrated against a strong base at half neutralisation point, pH = 21 pKa . Choose the correct answer from the options given below: (1) (B), (C) (2) (A), (D) (3) (A), (B), (C) (4) (B), (C), (D)

Q33.According to MO theory the bond orders for O22−CO, and NO+ respectively, are (1) 1, 3 and 3 (2) 1, 3 and 2 (3) 1, 2 and 3 (4) 2, 3 and 3

Q33.Bond dissociation energy of E −H bond of the " H2E" hydrides of group 16 elements (given below), follows order. (A) O (B) S (C) Se (D) Te (1) A > B > C > D (2) A > B > D > C (3) B > A > C > D (4) D > C > B > A Q34. 1 mole of ideal gas is allowed to expand reversibly and adiabatically from a temperature of 27°C. The work done is 3 kJ mol−1 . The final temperature of the gas is _____ K (Nearest integer). Given Cv = 20 J mol−1 K−1

Q33.The correct order of electronegativity for given elements is (1) P > Br > C > At (2) Br > P > At > C (3) Br > C > At > P (4) C > P > At > Br

Q33.Strong reducing and oxidizing agents among the following , respectively, are (1) Ce3 + and Ce4 + (2) Ce4 + and Tb4 + (3) Ce4 + and Eu2 + (4) Eu2 + and Ce4 +

Q33.The compound which does not exist is (1) NaO2 (2) BeH2 (3) PbEt4 (4) NH42BeF4

Q33.Choose the correct statement(s): A. Beryllium oxide is purely acidic in nature. B. Beryllium carbonate is kept in the atmosphere of CO2. C. Beryllium sulphate is readily soluble in water. D. Beryllium shows anomalous behavior. Choose the correct answer from the options given below: JEE Main 2023 (01 Feb Shift 1) JEE Main Previous Year Paper (1) A, B and C only (2) B,C and D only (3) A and B only (4) A only

Q33.Given below are two statements : Statement I : SO2 and H2O both possess V-shaped structure Statement II : The bond angle of SO2 is less than that of H2O. In the light of the above statements, choose the most appropriate answer from the options given below: (1) Both Statement I and Statement II are incorrect (2) Both Statement I and Statement II are correct (3) Statement I is incorrect but Statement II is correct(4) Statement I is correct but Statement II is incorrect

Q33.For electron gain enthalpies of the elements denoted as ΔegH , the incorrect option is : (1) ΔegH(Cl) < ΔegH(F) (2) ΔegH(Se) < ΔegH(S) (3) ΔegH(I) < ΔegH(At) (4) ΔegH(Te) < ΔegH(Po) Q34. 0. 3 g of ethane undergoes combustion at 27°C in a bomb calorimeter. The temperature of calorimeter system (including the water) is found to rise by 0. 5°C . The heat evolved during combustion of ethane at constant pressure is kJmol−1 . (Nearest integer) [Given : The heat capacity of the calorimeter system is 20 kJ K−1, R = 8. 3 JK−1 mol−1 . Assume ideal gas behaviour. Assume ideal gas behaviour. Atomic mass of C and H are 12 and 1 g mol−1 respectively]

Q33.Match List I with List II List II List I (No. of lone pairs of e- (molecules/ions) on central atom) (A) IF7 I. Three (B) ICl4- II. One (C) XeF6 III. Two (D) XeF2 IV. Zero Choose the correct answer from the options given below: (1) A - II, B - III, C - IV, D - I (2) A - IV, B - III, C - II, D - I (3) A - II, B - I, C - IV, D - III (4) A - IV, B - I, C - II, D - III

Q33.Which of the following statements are not correct? A. The electron gain enthalpy of F is more negative than that of Cl. B. Ionization enthalpy decreases in a group of periodic table. C. The electronegativity of an atom depends upon the atoms bonded to it. D. Al2 O3 and NO are examples of amphoteric oxides. Choose the most appropriate answer from the options given below: (1) A, B, C and D (2) A, B and D only (3) B and D only (4) A, C and D only

Q33.Match List I with List II List I List II A. XeF4 I.See-saw B. SF4 II. Square planar JEE Main 2023 (31 Jan Shift 1) JEE Main Previous Year Paper C. NH4+ III. Bent T - shaped D.BrF3 IV. Tetrahedral Choose the correct answer from the options given below : (1) A - IV, B - III, C - II, D - I (2) A - II, B - I, C - III, D - IV (3) A - IV, B - I, C - II, D - III (4) A - II, B - I, C - IV, D - III

Q34.The bond order and magnetic property of acetylide ion are same as that of (1) O2+ (2) N2+ (3) NO+ (4) O2−

Q34.For elements B, C, N Li, Be, O and F, the correct order of first ionisation enthalpy is (1) Li < Be < B < C < O < N < F (2) B < Li < Be < C < N < O < F (3) Li < Be < B < C < N < O < F (4) Li < B < Be < C < O < N < F

Q34.Which one of the following pairs is an example of polar molecular solids? (1) SO2( s), CO2( s) (2) SO2( s), NH3( s) (3) MgO(s), SO2(s) (4) HCl(s), AlN(s)

Q34.For 1 mol of gas, the plot of pV vs p is shown below. p is the pressure and V is the volume of the gas. JEE Main 2023 (29 Jan Shift 1) JEE Main Previous Year Paper What is the value of compressibility factor at point A ? (1) 1 − RTVa (2) 1 + Vb (3) 1 −bV (4) 1 + RTVa

Q34.In which of the following processes, the bond order increases and paramagnetic character changes to diamagnetic one? (1) O2 →O+2 (2) O2 →O2−2 (3) NO →NO+ (4) N2 →N+2 JEE Main 2023 (13 Apr Shift 1) JEE Main Previous Year Paper

Q34.H2O2 acts as a reducing agent in (1) 2NaOCl + H2O2 →2NaCl + H2O + O2 (2) 2Fe2 + + 2H+ + H2O2 →2Fe3 + + 2H2O (3) Mn2 + + 2H2O2 →MnO2 + 2H2O (4) Na2 S + 4H2O2 →Na2SO4 + 4H2O

Q35.Reaction of BeO with ammonia and hydrogen fluoride gives 'A' which on thermal decomposition gives BeF2 and NH4F. What is 'A' ? (1) H3NBeF3 (2) NH42BeF4 (3) NH4BeF3 (4) NH42Be2F6

Q35.Arrange the following gases in increasing order of van der Waals constant ′a′ (A) Ar (B) CH4 (C) H2O (D) C6H6 Choose the correct option from the following. (1) D, C, B and A (2) B, C, D and A (3) C, D, B and A (4) A, B, C and D

Q35. ClF5 at room temperature is a (1) Colourless liquid with trigonal (2) Colourless gas with square pyramidal geometry bipyramidal geometry (3) Colourless gas with trigonal bipyramidal (4) Colourless liquid with square pyramidal geometry geometry