Quiz for VSEPR theory

Q1: What does VSEPR stand for?

A. Valence Shell Electron Pair Repulsion B. Valence Shell Electron Pair Reaction C. Variable Shell Electron Pair Repulsion D. Valence Shell Electron Pair Rotation

Q2: According to VSEPR theory, molecular shape is determined by?

A. Nuclei repulsion B. Electron pairs repulsion C. Bond energies D. Atomic masses

Q3: What shape does a molecule with 2 bonding pairs and no lone pairs have?

A. Linear B. Bent C. Trigonal planar D. Tetrahedral

Q4: Which molecule has trigonal planar geometry?

A. BF3 B. NH3 C. H2O D. CH4

Q5: What geometry does NH3 molecule have according to VSEPR?

A. Trigonal planar B. Tetrahedral C. Trigonal pyramidal D. Linear

Q6: Which molecule is bent in shape?

A. CO2 B. H2O C. BF3 D. CH4

Q7: What is the shape of methane (CH4)?

A. Tetrahedral B. Square planar C. Trigonal planar D. Linear

Q8: VSEPR theory is used to predict?

A. Molecular polarity B. Molecular shape C. Bond strength D. Atomic number

Q9: What effect do lone pairs have on bond angles?

A. Increase bond angles B. Decrease bond angles C. No effect D. Convert bonds to ionic

Q10: Which shape corresponds to 5 bonding pairs and no lone pairs?

A. Trigonal bipyramidal B. Square pyramidal C. Octahedral D. Tetrahedral

Q11: In VSEPR, lone pairs are?

A. Less repulsive than bonding pairs B. More repulsive than bonding pairs C. Equal in repulsion D. Negligible

Q12: What is the shape of SF6 molecule?

A. Octahedral B. Tetrahedral C. Trigonal planar D. Linear

Q13: Which molecule has seesaw shape?

A. SF4 B. PCl5 C. XeF4 D. CO2

Q14: What is the bond angle in a trigonal planar molecule?

A. 120° B. 109.5° C. 90° D. 180°

Q15: How many lone pairs are in water molecule?

A. 0 B. 1 C. 2 D. 3

Q16: What shape is associated with 6 bonding pairs and no lone pairs?

A. Octahedral B. Tetrahedral C. Square planar D. Trigonal bipyramidal

Q17: Which factor is not considered in VSEPR theory?

A. Number of electron pairs B. Lone pair repulsion C. Bond pair repulsion D. Electronegativity

Q18: Which shape corresponds to 4 bonding pairs and 1 lone pair?

A. Trigonal pyramidal B. Tetrahedral C. Square planar D. Trigonal bipyramidal

Q19: Why do lone pairs occupy more space than bonding pairs?

A. They have higher energy B. Closer to nucleus C. Greater electron-electron repulsion D. Bonding pairs are shared