91
Which of the following has p - d bonding?
- NO3-
- SO32-
- BO33-
- CO32-
AIPMT 2002
Chemical Bonding and Molecular Structure
Previous year questions with solutions · 2000 – 2026
109Questions
36Papers covered
5.56% ↓16.7%Weightage in 2026
’00
’01
’02
’03
’04
’05
’06
’07
’08
’09
’10
’11
’12
’13
’14
’15
’16
’17
’18
’19
’20
’21
’22
’23
’24
’25
’26
Year-wise statistics questions · papers · average per paper · weightage
| Year | Questions | Papers | Avg / paper | Weightage |
|---|---|---|---|---|
| 2026 | 5 | 2 | 2.5 | 5.56% ↓16.7% |
| 2025 | 3 | 1 | 3 | 6.67% ↓3.8% |
| 2024 | 7 | 2 | 3.5 | 6.93% ↑76.7% |
| 2023 | 2 | 1 | 2 | 3.92% ↓1% |
| 2022 | 4 | 2 | 2 | 3.96% ↓34% |
| 2021 | 3 | 1 | 3 | 6.00% ↑35% |
| 2020 | 2 | 1 | 2 | 4.44% ↑100% |
| 2019 | 1 | 1 | 1 | 2.22% ↓50% |
| 2018 | 2 | 1 | 2 | 4.44% ↓33.3% |
| 2017 | 3 | 1 | 3 | 6.67% ↓14.3% |
| 2016 | 7 | 2 | 3.5 | 7.78% →0% |
| 2015 | 7 | 2 | 3.5 | 7.78% ↑75% |
| 2014 | 2 | 1 | 2 | 4.44% ↓43.5% |
| 2013 | 7 | 2 | 3.5 | 7.87% ↑4.9% |
| 2012 | 6 | 2 | 3 | 7.50% ↓24.1% |
| 2011 | 8 | 2 | 4 | 9.88% ↑31.7% |
| 2010 | 6 | 2 | 3 | 7.50% ↓23.5% |
| 2009 | 5 | 1 | 5 | 9.80% ↑66.7% |
| 2008 | 3 | 1 | 3 | 5.88% ↑47.1% |
| 2007 | 2 | 1 | 2 | 4.00% ↓60% |
| 2006 | 5 | 1 | 5 | 10.00% ↑25% |
| 2005 | 4 | 1 | 4 | 8.00% ↓4% |
| 2004 | 4 | 1 | 4 | 8.33% ↑308.3% |
| 2003 | 1 | 1 | 1 | 2.04% ↓49% |
| 2002 | 2 | 1 | 2 | 4.00% ↓49% |
| 2001 | 4 | 1 | 4 | 7.84% →0% |
| 2000 | 4 | 1 | 4 | 7.84% |
⚠ 4 of these questions are out of the current syllabus (marked on the question).
92
In NO3- ion number of bond pair and lone pair of electrons on nitrogen atom are
- 2, 2
- 3, 1
- 1, 3
- 4, 0
AIPMT 2002
93
Main axis of a diatomic molecule is z, atomic orbitals px and py overlap to form which of the following orbitals.
- molecular orbital
- molecular orbital
- molecular orbital
- No bond will form
AIPMT 2001
94
Which of the following two are isostructural?
- XeF2, IF2-
- NH3, BF3
- CO32-, SO32-
- PCl5, ICl5
AIPMT 2001
95
In which of the following bond angle is maximum ?
- NH3
- NH4+
- PCl3
- SCl2
AIPMT 2001
96
In X-H Y, X and Y both are electronegative elements. Then
- electron density on X will increase and on H will decrease
- in both electron density will increase
- in both electron density will decrease
- on X electron density will decrease and on H will increase.
AIPMT 2001
97
d - p bond present in
- CO32-
- PO43-
- NO3-
- NO2-
AIPMT 2000
98
Right order of dissociation energy N2 and N2+ is
- N2 > N2+
- N2 = N2+
- N2+ > N2
- none
AIPMT 2000
99
Which species does not exhibit paramagnetism?
- N2+
- O2-
- CO
- NO
AIPMT 2000
100
Which compound forms linear polymer due to H-bond?
- H2O
- NH3
- HF
- HCl
Out of syllabusAIPMT 2000