Chemistry
Theories of Covalent Bonding and Shapes of Molecules
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#1 What is the main characteristic of covalent bonding?
A) Transfer of electrons
B) Sharing of electrons
C) Attraction between oppositely charged ions
D) Formation of crystals
#2 Which of the following is a correct example of covalent bonding?
A) NaCl
B) H2O
C) MgO
D) CaCl2
#3 According to VSEPR theory, the shape of the CH4 molecule is?
A) Tetrahedral
B) Linear
C) Trigonal planar
D) Bent
#4 Which of the following statements is true about the bond angles in a water (H2O) molecule?
A) Bond angles are 180 degrees
B) Bond angles are 109.5 degrees
C) Bond angles are 104.5 degrees
D) Bond angles are 90 degrees
#5 What type of bonding is responsible for the formation of a hydrogen molecule (H2)?
A) Ionic bonding
B) Covalent bonding
C) Metallic bonding
D) Coordinate bonding
#6 The shape of the ammonia (NH3) molecule is?
A) Tetrahedral
B) Trigonal planar
C) Trigonal pyramidal
D) Linear
#7 In which of the following molecules does the central atom undergo sp2 hybridization?
A) CH4
B) SO2
C) CO2
D) NH3
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