Question 1

Which molecular geometry is predicted by the VSEPR model for the molecule CCl$$_4$$?

Accepted Answer

Tetrahedral

Question 2

What is the predicted bond angle for a molecule with a tetrahedral electron domain geometry?

Accepted Answer

$$109.5^\circ$$

Question 3

Which of the following molecules is always non-polar if all outer atoms are the same?

Accepted Answer

Trigonal planar

Question 4

How many electron domains are around the central atom in BF$$_3$$?

Accepted Answer

3

Question 5

What is the hybridization of the central atom in SF$$_6$$?

Accepted Answer

sp$$^3d$^2$$

Question 6

Which statement best explains why CO$$_2 is $$non-polar?

Accepted Answer

The molecule has polar bonds, but the dipoles cancel due to its linear geometry.

Question 7

What is the molecular geometry of NH$$_3$$ according to the VSEPR model?

Accepted Answer

Trigonal pyramidal

Question 8

Which type of orbital overlap forms a sigma ($$\sigma) $$bond?

Accepted Answer

End-to-end overlap of atomic orbitals along the internuclear axis

Question 9

In formaldehyde (CH$$_2O$$), how many unhybridized p orbitals are present on the carbon atom?

Accepted Answer

1

Question 10

Which molecule below has a trigonal bipyramidal electron domain geometry?

Accepted Answer

PCl$$_5$$

Question 11

What is the predicted bond angle for a molecule with three electron domains and no lone pairs on the central atom?

Accepted Answer

$$120^\circ$$

Question 12

Which of the following best describes the molecular geometry of SnCl$$_3^-$$?

Accepted Answer

Trigonal pyramidal

Question 13

Which hybridization corresponds to a linear geometry?

Accepted Answer

sp

Question 14

What is the electron domain geometry of XeF$$_2$$?

Accepted Answer

Trigonal bipyramidal

Question 15

Which of the following molecules is always polar, regardless of the identity of the outer atoms?

Accepted Answer

Square pyramidal

Question 16

In acetonitrile (CH$$_3CN$$), how many sigma ($$\sigma) $$and pi ($$\pi) $$bonds are present?

Accepted Answer

5 $$\sigma$$, 2 $$\pi$$

Question 17

Which of the following best describes the orbital overlap in the C-H bond of methane (CH$$_4$$)?

Accepted Answer

Overlap of sp$$^3$$ hybrid orbital on C with 1s orbital on H

Question 18

Which molecule below has a bent molecular geometry?

Accepted Answer

H$$_2O$$

Question 19

What is the electron domain geometry and hybridization of the central atom in SO$$_3$$?

Accepted Answer

Trigonal planar, sp$$^2$$

Question 20

Which of the following statements about pi ($$\pi) $$bonds is correct?

Accepted Answer

Pi bonds are formed by sideways overlap of p orbitals and are generally weaker than sigma bonds.

Chemistry Chapter 9

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