Question 1

Which of the following best describes the type of bond and molecular shape in carbon dioxide ($$CO_2$$)?

Accepted Answer

Nonpolar covalent bonds; linear shape

Question 2

What is the correct name for the compound $$N_2O_4$$?

Accepted Answer

Dinitrogen tetroxide

Question 3

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

Accepted Answer

CCl$$_4$$

Question 4

Given the electronegativity values: $$K = 0.8$$, $$N = 3.0$$, what type of bond is formed in $$KN$$?

Accepted Answer

Ionic

Question 5

Which of the following is the correct Lewis structure for ammonia ($$NH_3$$)?

Accepted Answer

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

Question 6

What is the molecular geometry and bond angle of $$SO_2$$?

Accepted Answer

Bent; $$120^\circ$$

Question 7

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

Accepted Answer

CO

Question 8

Which of the following elements exists naturally as a diatomic molecule?

Accepted Answer

Oxygen

Question 9

What is the correct formula for diphosphorus pentoxide?

Accepted Answer

$$P_2O_5$$

Question 10

Which of the following statements about electronegativity is correct?

Accepted Answer

Electronegativity decreases down a group and increases across a period.

Question 11

A molecule of $$CH_4 ($$methane) has which of the following shapes and bond angles?

Accepted Answer

Tetrahedral; $$109^\circ$$

Question 12

Which of the following is an exception to the octet rule?

Accepted Answer

SF$$_6$$

Question 13

Which of the following best describes the polarity of $$H_2O$$?

Accepted Answer

Polar molecule with polar bonds

Question 14

What is the correct name for the compound $$Cl_2O_7$$?

Accepted Answer

Dichlorine heptoxide

Question 15

Which of the following molecules has a trigonal pyramidal shape?

Accepted Answer

NH$$_3$$

Question 16

Which of the following best explains why $$CO_2 is $$nonpolar while $$H_2O is $$polar, even though both have polar bonds?

Accepted Answer

The dipoles in $$CO_2$$ cancel due to its linear shape, while the dipoles in $$H_2O do $$not cancel due to its bent shape.

Question 17

Which of the following is the correct Lewis structure for $$CO_2$$?

Accepted Answer

O=C=O, with each O atom having two lone pairs

Question 18

Which of the following compounds is ionic?

Accepted Answer

K$$_2O$$

Question 19

What is the correct name for the compound $$SiCl_4$$?

Accepted Answer

Silicon tetrachloride

Question 20

Which of the following molecules has a bond angle closest to $$120^\circ$$?

Accepted Answer

SO$$_2$$

Molecular Compounds: Structure, Bonding, and Polarity

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