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Chemical Bonding and Molecular Structure

JEE Main 2024 (Online) 8th April Evening ShiftMCQEasy📈 Topic in 29% papers+4−1
Ques. 1JEE 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

Answer

(2) A - B

Solution

By LCAO, adding the two wave functions gives the bonding MO, = A + B (constructive overlap), and subtracting them gives the antibonding MO, = A - B (destructive overlap).

Two identical atomic orbitals contribute equally, so a coefficient 2 is not used; (A) and (C) are wrong and (D) is the bonding MO.

Answer: (2)

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Ques. 2JEE 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. 3JEE 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. 4JEE 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. 5JEE 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. 6JEE 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. 7JEE 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
Ques. 8JEE Main 2024, 6 April (Evening Shift)

Total number of species from the following with central atom utilising sp2 hybrid orbitals for bonding is . NH3, SO2, SiO2, BeCl2, C2H2, C2H4, BCl3, HCHO, C6H6, BF3, C2H4Cl2

Ques. 9JEE Main 2024, 5 April (Morning Shift)

In the Lewis dot structure for NO2-, total number of valence electrons around nitrogen is .

Ques. 10JEE Main 2024, 5 April (Evening Shift)

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

  1. (A)-(I), (B)-(IV), (C)-(III), (D)-(II)
  2. (A)-(IV), (B)-(I), (C)-(II), (D)-(III)
  3. (A)-(I), (B)-(III), (C)-(II), (D)-(IV)
  4. (A)-(IV), (B)-(III), (C)-(II), (D)-(I)
Ques. 11JEE Main 2024, 5 April (Evening Shift)

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). In the light of the above statements, choose the correct answer from the options given below :

  1. (A) is false but (R) is true
  2. (A) is true but (R) is false
  3. Both (A) and (R) are true but (R) is NOT the correct explanation of (A)
  4. Both (A) and (R) are true and (R) is the correct explanation of (A)

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