This page covers CAPF AC Chemical Bonding & Molecular Structure with complete concept notes, 16 graded practice MCQs, key points and exam-specific tips. Free to study.
In a covalent bond, electrons are shared between atoms. Which of the following best describes the nature of a coordinate covalent bond (dative bond)?
Practice 2easy
The bond angle in a water molecule (H₂O) is approximately 104.5° instead of 120°. This deviation from the expected tetrahedral angle is primarily due to:
Practice 3easy
Which of the following molecules exhibits sp hybridization in its central atom?
Practice 4easy
The electronegativity values of C, N, and O are approximately 2.5, 3.0, and 3.5 respectively. Which bond is most polar?
Practice 5easy
In the ammonia molecule (NH₃), the molecular geometry is trigonal pyramidal while the electron geometry is tetrahedral. What accounts for this difference?
Practice 6medium
Which of the following molecules exhibits sp hybridization in its central atom?
Practice 7medium
The bond angle in NH₃ is approximately 107°, while in CH₄ it is 109.5°. This difference is primarily due to:
Practice 8medium
In the Lewis structure of PCl₅, the number of bonding pairs and lone pairs on the central phosphorus atom are respectively:
Practice 9medium
Which of the following molecules is polar despite having a symmetrical molecular geometry?
Practice 10medium
The molecular geometry of SF₆ is octahedral because the central sulfur atom is bonded to six fluorine atoms with:
Practice 11medium
In the molecule N₂, the bond order is 3. This indicates the presence of:
Practice 12medium
The VSEPR theory predicts that ClF₃ has a molecular geometry of:
Practice 13medium
Which of the following compounds exhibits resonance structures?
Practice 14hard
A molecule has a bond order of 2.5 between two atoms. Which of the following statements is CORRECT regarding this bond?
Practice 15hard
In the molecular orbital diagram of O₂, the two unpaired electrons occupy which orbitals?
Practice 16hard
The H–O–H bond angle in water is approximately 104.5° instead of the expected 109.5° from sp³ hybridization. Which factor is primarily responsible for this deviation?