JEE Main 202628 JanuaryMorning Shift
- Exam
- JEE Main
- Year
- 2026
- Date
- 28 January
- Shift
- Morning Shift
- Subject
- Chemistry
- Chapter
- Chemical Bonding and Molecular Structure
JEE Main 2026 · 28 January · Morning Shift · Chemistry · Chemical Bonding and Molecular Structure
Given below are two statements: Statement I : The number of species...
Given below are two statements:
Statement I: The number of species among and , that have unequal bond lengths is two. Here, E is the central atom.
Statement II: Among and has the highest bond order.
In the light of the above statements, choose the correct answer from the options given below
Statement I: The number of species among and , that have unequal bond lengths is two. Here, E is the central atom.
Statement II: Among and has the highest bond order.
In the light of the above statements, choose the correct answer from the options given below
Options
- ABoth Statement I and Statement II are false
- BStatement I is true but Statement II is false
- CStatement I is false but Statement II is true
- DBoth Statement I and Statement II are true
Correct answer
A. Both Statement I and Statement II are false
Step-by-step solution
Statement I: Let's analyze the geometry of the given species.
: hybridization, tetrahedral geometry. All B-F bond lengths are equal.
: hybridization, tetrahedral geometry. All Si-F bond lengths are equal.
: hybridization, square planar geometry. All Xe-F bond lengths are equal.
: hybridization, see-saw geometry. It has axial and equatorial bonds. Axial bonds are longer than equatorial bonds due to greater repulsion. Thus, only has unequal bond lengths. The number of species is one, not two. Statement I is false.
Statement II: Bond order calculation using Molecular Orbital Theory:
Total electrons in = 17, Bond Order = 1.5
Total electrons in = 18, Bond Order = 1.0
Total electrons in = 18, Bond Order = 1.0
Total electrons in = 15, Bond Order = 2.5
Among these, has the highest bond order (2.5), not . Statement II is false.
Both Statement I and Statement II are false.
: hybridization, tetrahedral geometry. All B-F bond lengths are equal.
: hybridization, tetrahedral geometry. All Si-F bond lengths are equal.
: hybridization, square planar geometry. All Xe-F bond lengths are equal.
: hybridization, see-saw geometry. It has axial and equatorial bonds. Axial bonds are longer than equatorial bonds due to greater repulsion. Thus, only has unequal bond lengths. The number of species is one, not two. Statement I is false.
Statement II: Bond order calculation using Molecular Orbital Theory:
Total electrons in = 17, Bond Order = 1.5
Total electrons in = 18, Bond Order = 1.0
Total electrons in = 18, Bond Order = 1.0
Total electrons in = 15, Bond Order = 2.5
Among these, has the highest bond order (2.5), not . Statement II is false.
Both Statement I and Statement II are false.