Quiz 1 - Molecular Geometry | Molecular Geometry
General Chemistry 1 - Quiz 1 - Molecular Geometry
Which of the following species is square planar?
XeF4 : AX4E2 ; BF4- : AX4 ; SF4 : AX4E ; SiF4 : AX4
square planar: AX4E2
Which of the following species is T-shaped?
ClF3 : AX3E2 ; PF3 : AX3E ; ClO3- : AX3E ; NH3 : AX3E
T-shaped: AX3E2
What is the electron pair geometry of H2O?
H2O: 4 electron groups around the central oxygen atom (2 neighboring atoms + 2 lone pairs)
What is the molecular shape of ICl2-?
ICl2-: 5 electron groups around the central iodine atom (2 neighboring atoms + 3 lone pairs) ⇒ AX2E3
Which of the following molecules is nonpolar?
SF6 is octahedral (AX6) ⇒ bond dipoles in SF6 cancel each other ⇒ overall dipole moment of SF6 = 0
Which of the following molecules has a dipole moment?
SO2 is bent (AX2E) ⇒ bond dipoles do not cancel each other ⇒ overall dipole moment of SO2 0
What is the molecular geometry of the ion ClO4-?
ClO4- has four bonding pairs and no lone pairs around the central chlorine atom, resulting in a tetrahedral molecular geometry.
Which molecule has the smallest bond angle due to lone pair repulsion?
H2O has two lone pairs on the oxygen atom, which exert strong repulsive forces, reducing the H-O-H bond angle to about 104.5°, compared to NH3 (107°) and CH4 (109.5°).
Which of the following molecules has bond angles closest to 90°?
SF6 has six bonding pairs and no lone pairs around the central sulfur atom, resulting in an octahedral shape with bond angles of 90°.
What is the correct VSEPR notation for XeO4?
XeO4 has four bonding pairs and no lone pairs around the central xenon atom, resulting in the VSEPR notation AX4 and a tetrahedral shape.