1|CHE 1301
CHE 1301 – SI EXAM 2 QUESTIONS AND ANSWERS, LATEST 2025 RATED A+
You may use a calculator and periodic table
1. What is the electron geometry of a molecule with four electron groups?
a) Linear
b) Trigonal planar
c) Tetrahedral
d) Octahedral
2. A molecule with a central atom surrounded by three bonds and one lone pair has what
electron geometry?
a) Trigonal planar
b) Tetrahedral
c) Trigonal pyramidal
d) Linear
3. Which of the following molecules is nonpolar?
a) CO₂
b) H₂O
c) NH₃
d) CH₃Cl
4. What is the molecular geometry of a molecule with five bonds and no lone pairs?
a) Square planar
b) Trigonal bipyramidal
c) Octahedral
d) Linear
Valence Bond Theory and Hybridization
5. What type of hybridization is associated with a central atom that has two single bonds
and one lone pair?
a) sp
b) sp²
c) sp³
d) sp³d
6. The bond angle in a trigonal planar molecule is approximately:
a) 90°
b) 109.5°
c) 120°
d) 180°
7. Which hybridization corresponds to a central atom with four bonding pairs?
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a) sp
b) sp²
c) sp³
d) dsp³
8. A molecule with a bond angle of 105° is most likely:
a) Tetrahedral
b) Trigonal pyramidal
c) Trigonal planar
d) Bent
9. What is the hybridization of the carbon atom in ethylene (C₂H₄)?
a) sp
b) sp²
c) sp³
d) sp³d
Sigma and Pi Bonds
10. Which type of bond is formed by the side-to-side overlap of atomic orbitals?
a) Sigma (σ) bond
b) Pi (π) bond
c) Delta (δ) bond
d) Ionic bond
11. A double bond consists of:
a) One σ bond and one π bond
b) Two σ bonds
c) Two π bonds
d) One δ bond and one σ bond
12. In which of the following does one pi and one sigma bond occur?
a) H₂
b) O₂
c) N₂
d) All of the above
13. What is the main difference between σ and π bonds?
a) Their length
b) Their strength
c) The type of orbital overlap
d) Their location in the molecule
14. Which bond is typically the strongest?
CHE 1301 – SI EXAM 2 QUESTIONS AND ANSWERS, LATEST 2025 RATED A+
You may use a calculator and periodic table
1. What is the electron geometry of a molecule with four electron groups?
a) Linear
b) Trigonal planar
c) Tetrahedral
d) Octahedral
2. A molecule with a central atom surrounded by three bonds and one lone pair has what
electron geometry?
a) Trigonal planar
b) Tetrahedral
c) Trigonal pyramidal
d) Linear
3. Which of the following molecules is nonpolar?
a) CO₂
b) H₂O
c) NH₃
d) CH₃Cl
4. What is the molecular geometry of a molecule with five bonds and no lone pairs?
a) Square planar
b) Trigonal bipyramidal
c) Octahedral
d) Linear
Valence Bond Theory and Hybridization
5. What type of hybridization is associated with a central atom that has two single bonds
and one lone pair?
a) sp
b) sp²
c) sp³
d) sp³d
6. The bond angle in a trigonal planar molecule is approximately:
a) 90°
b) 109.5°
c) 120°
d) 180°
7. Which hybridization corresponds to a central atom with four bonding pairs?
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a) sp
b) sp²
c) sp³
d) dsp³
8. A molecule with a bond angle of 105° is most likely:
a) Tetrahedral
b) Trigonal pyramidal
c) Trigonal planar
d) Bent
9. What is the hybridization of the carbon atom in ethylene (C₂H₄)?
a) sp
b) sp²
c) sp³
d) sp³d
Sigma and Pi Bonds
10. Which type of bond is formed by the side-to-side overlap of atomic orbitals?
a) Sigma (σ) bond
b) Pi (π) bond
c) Delta (δ) bond
d) Ionic bond
11. A double bond consists of:
a) One σ bond and one π bond
b) Two σ bonds
c) Two π bonds
d) One δ bond and one σ bond
12. In which of the following does one pi and one sigma bond occur?
a) H₂
b) O₂
c) N₂
d) All of the above
13. What is the main difference between σ and π bonds?
a) Their length
b) Their strength
c) The type of orbital overlap
d) Their location in the molecule
14. Which bond is typically the strongest?
