Question 1

Which of the following correctly describes the bonding and molecular geometry of carbon dioxide ($$\mathrm{CO_2$}$$)?

Accepted Answer

It has two double bonds and a linear geometry.

Question 2

What is the correct name for the compound $$\mathrm{N_2O_4}$$?

Accepted Answer

Dinitrogen tetraoxide

Question 3

Which of the following molecules is nonpolar, despite having polar bonds?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 4

Given the electronegativity values: H (2.1), Cl (3.0), what type of bond is present in HCl?

Accepted Answer

Polar covalent

Question 5

Which of the following compounds is ionic?

Accepted Answer

$$\mathrm{$$BaCl_2$$}$$

Question 6

What is the correct Lewis structure for ammonia ($$\mathrm{NH_3$}$$)?

Accepted Answer

A nitrogen atom with three single bonds to hydrogen atoms and one lone pair on nitrogen.

Question 7

Which of the following molecules has a trigonal pyramidal shape?

Accepted Answer

$$\mathrm{NH_3$}$$

Question 8

What is the molecular formula for diphosphorus pentoxide?

Accepted Answer

$$\mathrm{P_2O_5}$$

Question 9

Which of the following elements exists as a diatomic molecule under standard conditions?

Accepted Answer

Nitrogen

Question 10

A molecule of $$\mathrm{SO_2$}$$ has three electron groups around the central atom. What is its molecular shape and approximate bond angle?

Accepted Answer

Bent, 120°

Question 11

Which of the following best describes the octet rule?

Accepted Answer

Atoms tend to gain, lose, or share electrons to achieve eight valence electrons.

Question 12

Which of the following molecules is polar due to its shape and bond polarity?

Accepted Answer

$$\mathrm{H_2O}$$

Question 13

What is the correct name for the compound $$\mathrm{Cl_2O_7}$$?

Accepted Answer

Dichlorine heptoxide

Question 14

Which of the following statements about electronegativity is correct?

Accepted Answer

Electronegativity is highest for fluorine.

Question 15

Which of the following compounds contains a triple bond in its Lewis structure?

Accepted Answer

$$\mathrm{CO} ($$carbon monoxide)

Question 16

Which of the following is the correct formula for dinitrogen monoxide?

Accepted Answer

$$\mathrm{N_2O}$$

Question 17

Which of the following molecules has a tetrahedral shape?

Accepted Answer

$$\mathrm{CH_4$}$$

Question 18

Which of the following is a correct statement about the polarity of $$\mathrm{$$CCl_4$$}$$?

Accepted Answer

It is nonpolar because the dipoles cancel out.

Question 19

Which of the following is the correct Lewis structure for water ($$\mathrm{H_2O}$$)?

Accepted Answer

An oxygen atom with two single bonds to hydrogen atoms and two lone pairs on oxygen.

Question 20

Which of the following molecules is bent due to the presence of lone pairs on the central atom?

Accepted Answer

$$\mathrm{SO_2$}$$

Molecular Compounds: Structure, Naming, Bonding, and Polarity

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