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Chemical Bonding and Molecular Structure

JEE Main 2024 (Online) 9th April Evening ShiftMCQEasy📈 Topic in 34% papers+4−1
Ques. 1JEE Main 2024, 9 April (Evening Shift)

The correct increasing order for bond angles among BF3, PF3 and ClF3 is :

  1. BF3 = PF3 < ClF3
  2. BF3 < PF3 < ClF3
  3. ClF3 < PF3 < BF3
  4. PF3 < BF3 < ClF3

Answer

(3) ClF3 < PF3 < BF3

Solution

BF3: 3 bp, 0 lp, so trigonal planar; F–B–F = 120°

PF3: 3 bp, 1 lp, so pyramidal; F–P–F ≈ 97°

ClF3: 3 bp, 2 lp (equatorial), so bent T-shape; F–Cl–F ≈ 87.5°

∵ lone pairs push the bonds closer, more lone pairs give a smaller angle

∴ ClF3 < PF3 < BF3

Answer: (3)

Keep practising — Chemical Bonding and Molecular Structure

Ques. 2JEE Main 2024, 9 April (Evening Shift)

Total number of electrons present in ( ) molecular orbitals of O2, O2+ and O2- is .

Ques. 3JEE Main 2024, 8 April (Morning Shift)

Match List I with List II Choose the correct answer 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
Ques. 4JEE Main 2024, 8 April (Morning Shift)

Number of molecules from the following which are exceptions to octet rule is . CO2, NO2, H2SO4, BF3, CH4, SiF4, ClO2, PCl5, BeF2, C2H6, CHCl3, CBr4

Ques. 5JEE Main 2024, 8 April (Evening Shift)

When A and B are the wave functions of atomic orbitals, then is represented by :

  1. A + 2 B
  2. A - B
  3. A - 2 B
  4. A + B
Ques. 6JEE Main 2024, 8 April (Evening Shift)

Number of molecules having bond order 2 from the following molecules is . C2, O2, Be2, Li2, Ne2, N2, He2

Ques. 7JEE Main 2024, 6 April (Morning Shift)

Match List I with List II Choose the correct answer from the options given below:

  1. A-III, B-II, C-IV, D-I
  2. A-III, B-IV, C-II, D-I
  3. A-II, B-IV, C-III, D-I
  4. A-II, B-III, C-I, D-IV
Ques. 8JEE Main 2024, 6 April (Morning Shift)

Match List I with List II Choose the correct answer from the options given below:

  1. A-II, B-III, C-I, D-IV
  2. A-III, B-I, C-II, D-IV
  3. A-IV, B-I, C-III, D-II
  4. A-III, B-IV, C-II, D-I
Ques. 9JEE Main 2024, 6 April (Morning Shift)

Match List I with List II Choose the correct answer from the options given below:

  1. A-III, B-I, C-IV, D-II
  2. A-III, B-IV, C-I, D-II
  3. A-IV, B-III, C-I, D-II
  4. A-II, B-I, C-IV, D-III
Ques. 10JEE Main 2024, 6 April (Morning Shift)

Number of molecules from the following which can exhibit hydrogen bonding is . (nearest integer) CH3OH, H2O, C2H6, C6H6, [figure] , HF, NH3

Ques. 11JEE Main 2024, 6 April (Evening Shift)

Given below are two statements : 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. Statement I is true but Statement II is false
  3. Statement I is false but Statement II is true
  4. Both Statement I and Statement II are true

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