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Chemical Bonding and Molecular Structure

JEE Main 2025 (Online) 22nd January Evening ShiftMCQMedium📈 Topic in 8% papers+4−1
Ques. 1JEE Main 2025, 22 January (Evening Shift)

Arrange the following compounds in increasing order of their dipole moment : HBr, H2S, NF3 and CHCl3

  1. HBr < H2S < NF3 < CHCl3
  2. H2S < HBr < NF3 < CHCl3
  3. NF3 < HBr < H2S < CHCl3
  4. CHCl3 < NF3 < HBr < H2S

Answer

(3) NF3 < HBr < H2S < CHCl3

Solution

Net dipole = vector sum of bond dipoles and the lone pair:

[figure]

: NF3 0.24 < HBr 0.8 < H2S 0.95 < CHCl3 1.0 D

Answer: (3)

Keep practising — Chemical Bonding and Molecular Structure

Ques. 2JEE Main 2026, 8 April (Evening Shift)

Bromine trifluoride autoionizes to form BrF2 and BrF4 . The shapes of the cation and anion are respectively and .

  1. bent, square planar
  2. linear, square planar
  3. bent, see-saw
  4. linear, tetrahedral
Ques. 3JEE Main 2026, 6 April (Morning Shift)

The pairs among A = [SO32-, CO32-], B = [O22-, F2], C = [CN-, CO], D = [NH3, H3O+] and E = [MnO42-, CrO42-] that do not have similar Lewis dot structure are

  1. A, B and E
  2. A and E
  3. B, C and D
  4. C and D
Ques. 4JEE Main 2026, 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 true
  2. Both Statement I and Statement II are false
  3. Statement I is true but Statement II is false
  4. Statement I is false but Statement II is true
Ques. 5JEE Main 2026, 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 true
  2. Both Statement I and Statement II are false
  3. Statement I is true but Statement II is false
  4. Statement I is false but Statement II is true
Ques. 6JEE Main 2026, 5 April (Morning Shift)

Consider the following species: BrF5, XeF5-, BF4-, ICl4-, XeF4, SF4, NH4+, ClF3, XeF2, ICl2- Number of species having sp3d hybridized central atom is .

Ques. 7JEE Main 2026, 5 April (Evening Shift)

The covalent radii of atoms A and B are rA and rB, respectively. The covalent bond length and total length of AB molecule are respectively

  1. (rA + rB), 2(rA + rB)
  2. 12(rA + rB), (rA + rB)
  3. (rA + rB), (rA + rB)
  4. 2(rA + rB), 12(rA + rB)
Ques. 8JEE Main 2026, 4 April (Morning Shift)

According to Lewis theory, the total number of bond-pairs and lone pair of electrons around the central atom of XeO64- ion is .

Ques. 9JEE Main 2026, 4 April (Evening Shift)

Which of the following pictorial diagrams most correctly represents the * ( antibonding) molecular orbital between two atoms if the internuclear axis is taken to be in the z-direction ( z-axis) ?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 10JEE Main 2026, 2 April (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. Both Statement I and Statement II are false
  3. Statement I is true but Statement II is false
  4. Statement I is false but Statement II is true
Ques. 11JEE Main 2026, 2 April (Evening Shift)

SF4 is isostructural with : Choose the correct answer from the options given below :

  1. C Only
  2. C and E Only
  3. A and D Only
  4. B and E Only

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