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Chemical Bonding and Molecular Structure

JEE Main 2026 (Online) 22nd January Morning ShiftMCQEasy📈 Topic in 22% papers+4−1
Ques. 1JEE Main 2026, 22 January (Morning Shift)

Two p-block elements X and Y form fluorides of the type EF3. The fluoride compound XF3 is a Lewis acid and YF3 is a Lewis base. The hybridizations of the central atoms of XF3 and YF3 respectively are

  1. sp2 and sp3
  2. Both sp3
  3. Both sp2
  4. sp3 and sp2

Answer

(1) sp2 and sp3

Solution

XF3 is a Lewis acid, so X has only 6 valence electrons (3 bond pairs, no lone pair), as in BF3. With 3 electron pairs, X is sp2 hybridised (trigonal planar).

YF3 is a Lewis base, so Y has a lone pair to donate, as in NF3. With 3 bond pairs and 1 lone pair, Y is sp3 hybridised (trigonal pyramidal).

The hybridisations are sp2 and sp3.

Answer: (1)

Keep practising — Chemical Bonding and Molecular Structure

Ques. 2JEE Main 2026, 22 January (Morning Shift)

The formal charges on the atoms marked as (1) to (4) in the Lewis representation of HNO3 molecule respectively are [figure]

  1. 0, 0, -1, +1
  2. 0, -1, 0, +1
  3. 0, +1, 0, -1
  4. +1, 0, 0, -1
Ques. 3JEE Main 2026, 22 January (Evening Shift)

Among H2S, H2O, NF3, NH3 and CHCl3, identify the molecule (X) with lowest dipole moment value. The number of lone pairs of electrons present on the central atom of the molecule (X) is :

  1. 3
  2. 2
  3. 0
  4. 1
Ques. 4JEE Main 2026, 21 January (Morning 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 true
  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 false
Ques. 5JEE Main 2026, 21 January (Evening Shift)

The correct increasing order of C-H(A), C-O(B), C=O(C) and C N(D) bonds in terms of covalent bond length is :

  1. D < C < B < A
  2. D < C < A < B
  3. A < B < C < D
  4. A < D < C < B
Ques. 6JEE Main 2025, 7 April (Morning Shift)

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

  1. A-IV, B-III, C-II, D-I
  2. A-III, B-IV, C-I, D-II
  3. A-II, B-I, C-IV, D-III
  4. A-III, B-IV, C-II, D-I
Ques. 7JEE Main 2025, 7 April (Evening Shift)

In SO2, NO2- and N3-, the hybridizations at the central atom are respectively :

  1. sp2, sp2 and sp2
  2. sp, sp2 and sp
  3. sp2, sp and sp
  4. sp2, sp2 and sp
Ques. 8JEE Main 2025, 4 April (Morning Shift)

Which of the following molecule(s) show/s paramagnetic behavior? Choose the correct answer from the options given below:

  1. A & C only
  2. A & E Only
  3. A & D Only
  4. B Only
Ques. 9JEE Main 2025, 4 April (Evening Shift)

Given below are two statements: 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 correct
  2. Both Statement I and Statement II are incorrect
  3. Statement I is correct but Statement II is incorrect
  4. Statement I is incorrect but Statement II is correct
Ques. 10JEE Main 2025, 3 April (Morning Shift)

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

  1. A-IV, B-I, C-II, D-III
  2. A-III, B-I, C-IV, D-II
  3. A-II, B-III, C-IV, D-I
  4. A-I, B-II, C-III, D-IV
Ques. 11JEE Main 2025, 3 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. Both Statement I and Statement II are true
  3. Statement I is false but Statement II is true
  4. Statement I is true but Statement II is false

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