Question 1

Which molecular geometry is predicted for a molecule with three electron domains, two bonding pairs, and one lone pair on the central atom?

Accepted Answer

Bent

Question 2

What is the bond angle in a molecule with a tetrahedral electron-domain geometry and no lone pairs on the central atom?

Accepted Answer

$$109.5^\circ$$

Question 3

Which hybridization corresponds to a central atom with four electron domains?

Accepted Answer

$$sp^3$$

Question 4

In the VSEPR model, why do lone pairs occupy equatorial positions in trigonal bipyramidal geometries?

Accepted Answer

Because equatorial positions have larger bond angles, minimizing repulsion

Question 5

Which molecule is nonpolar despite having polar bonds?

Accepted Answer

CO$$_2$$

Question 6

What is the bond order of the H$$_2$$ molecule according to molecular orbital theory?

Accepted Answer

$$1$$

Question 7

Which of the following molecules is predicted to be paramagnetic?

Accepted Answer

O$$_2$$

Question 8

A molecule has a central atom with five electron domains: three bonding pairs and two lone pairs. What is its molecular geometry?

Accepted Answer

T-shaped

Question 9

Which statement best describes the effect of nonbonding electron pairs on bond angles?

Accepted Answer

Nonbonding pairs decrease bond angles due to greater repulsion

Question 10

What is the predicted hybridization of the central atom in PF$$_5$$?

Accepted Answer

$$sp^3d$

Question 11

Which molecular geometry results when a central atom has six electron domains, four bonding pairs, and two lone pairs?

Accepted Answer

Square planar

Question 12

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

Accepted Answer

Head-to-head overlap

Question 13

What is the bond order of He$$_2$$ according to molecular orbital theory?

Accepted Answer

$$0$$

Question 14

Which molecule has a trigonal pyramidal molecular geometry?

Accepted Answer

NH$$_3$$

Question 15

Which of the following is a real-world consequence of unethical behavior by a forensic chemist?

Accepted Answer

Conviction of innocent defendants

Question 16

What is the predicted electron-domain geometry for the central atom in XeF$$_2$$?

Accepted Answer

Trigonal bipyramidal

Question 17

Which molecule is predicted to have a bond angle closest to $$120^\circ$$?

Accepted Answer

BF$$_3$$

Question 18

Which statement about molecular orbitals is correct?

Accepted Answer

Each molecular orbital can hold a maximum of two electrons

Question 19

Which molecule has a square planar molecular geometry?

Accepted Answer

ICl$$_4^-$$

Question 20

What is the relationship between bond order and molecular stability?

Accepted Answer

Higher bond order means more stable molecule

Molecular Geometries and Bonding Theories: Study Notes

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