Ques. 1JEE Main 2025, 28 January (Evening Shift)
Total number of molecules/species from the following which will be paramagnetic is . O2, O2+, O2-, NO, NO2, CO, K2[NiCl4], [Co(NH3)6]Cl3, K2[Ni(CN)4]
Chemical Bonding and Molecular Structure
Previous year questions with solutions · 2024 – 2026
85Questions
56Papers covered
4.63%Weightage 2026▲ 10% vs last year
’24
’25
’26
Year-wise statistics questions · papers · average per paper · weightage
| Year | Questions | Papers | Avg / paper | Weightage |
|---|---|---|---|---|
| 2026 | 22 | 19 | 1.2 | 4.63% ▲ 10% vs last year |
| 2025 | 20 | 19 | 1.1 | 4.21% ▼ 41.2% vs last year |
| 2024 | 43 | 21 | 2 | 7.15% |
Ques. 2JEE Main 2024, 9 April (Morning Shift)
The total number of species from the following in which one unpaired electron is present, is . N2, O2, C2-, O2-, O22-, H2+, CN-, He2+
Ques. 3JEE Main 2024, 9 April (Evening Shift)
Total number of electrons present in ( ) molecular orbitals of O2, O2+ and O2- is .
Ques. 4JEE 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. 5JEE Main 2024, 4 April (Morning Shift)
Number of molecules/species from the following having one unpaired electron is . O2, O2-1, NO, CN-1, O22-
Ques. 6JEE Main 2024, 30 January (Morning Shift)
The total number of molecular orbitals formed from 2s and 2p atomic orbitals of a diatomic molecule is .
Ques. 7JEE Main 2024, 29 January (Morning Shift)
The number of species from the following which are paramagnetic and with bond order equal to one is . H2, He2+, O2+, N22-, O22-, F2, Ne2+, B2
Ques. 8JEE 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 .