#1
What is the shape of a molecule with a trigonal planar molecular geometry?
Trigonal planar
ExplanationThree bonding pairs, no lone pairs, 120-degree bond angles
#2
Which type of bond involves the sharing of electrons between atoms?
Covalent bond
ExplanationElectron sharing between atoms to achieve stability
#3
Which type of bond is formed due to the electrostatic attraction between ions?
Ionic bond
ExplanationTransfer of electrons from one atom to another, resulting in oppositely charged ions
#4
What is the bond angle in a molecule with a trigonal pyramidal molecular geometry?
107 degrees
ExplanationLone pair repulsion causing a slight deviation from the ideal 109.5 degrees
#5
Which type of bond is formed by the sharing of electrons equally between atoms?
Covalent bond
ExplanationEqual sharing of electron pairs between atoms
#6
What is the hybridization of carbon in methane (CH4)?
sp3
ExplanationFour electron pairs, tetrahedral geometry
#7
Which of the following molecules exhibits polar covalent bonding?
H2O
ExplanationAsymmetric electron distribution due to oxygen's higher electronegativity
#8
What is the geometry of a molecule with two bonding pairs and two lone pairs on the central atom?
Bent
ExplanationElectron repulsion causing a distortion from linear, resulting in bent shape
#9
Which of the following bonds is the weakest?
Hydrogen bond
ExplanationWeak attraction between a hydrogen atom and an electronegative atom
#10
What is the hybridization of oxygen in water (H2O)?
sp2
ExplanationThree electron pairs, trigonal planar geometry
#11
What is the molecular geometry of sulfur hexafluoride (SF6)?
Octahedral
ExplanationSix bonding pairs, no lone pairs, 90-degree bond angles
#12
What is the hybridization of nitrogen in ammonia (NH3)?
sp3
ExplanationFour electron pairs, tetrahedral geometry
#13
Which molecule exhibits both pi bonds and sigma bonds?
C2H4
ExplanationDouble bonds with both a side-to-side (pi) and end-to-end (sigma) overlap
#14
What is the molecular geometry of carbon dioxide (CO2)?
Linear
ExplanationTwo bonding pairs, no lone pairs, 180-degree bond angles
#15
What is the molecular geometry of ammonia (NH3)?
Trigonal pyramidal
ExplanationThree bonding pairs, one lone pair, 107-degree bond angles