Chemical Bonding and Molecular Structure

JEE Main 2024 (Online) 29th January Evening ShiftNumericalEasy📈 Topic in 20% papers+4

Ques. 1JEE Main 2024, 29 January (Evening Shift)

The total number of molecules with zero dipole moment among CH4, BF3, H2O, HF, NH3, CO2 and SO2 is .

Answer

μ = 0 only for a symmetric shape (bond dipoles cancel):

CH4 (tetrahedral), BF3 (trigonal planar), CO2 (linear) ⇒ μ = 0

H2O, SO2 (bent), NH3 (pyramidal), HF (polar bond) ⇒ μ ≠ 0

∴ 3 molecules

Answer: 3

Ques. 2JEE Main 2024, 29 January (Evening Shift)

The total number of anti bonding molecular orbitals, formed from 2s and 2p atomic orbitals in a diatomic molecule is .

Ques. 3JEE Main 2024, 27 January (Morning Shift)

Choose the polar molecule from the following:

Ques. 4JEE Main 2024, 27 January (Morning Shift)

Sum of bond order of CO and NO+ is .

Ques. 5JEE Main 2024, 27 January (Evening Shift)

The number of non-polar molecules from the following is . HF, H2O, SO2, H2, CO2, CH4, NH3, HCl, CHCl3, BF3

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