Question 1

Which of the following best describes a covalent bond?

Accepted Answer

A bond formed by the sharing of electrons between two atoms.

Question 2

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

Accepted Answer

Polar covalent bond

Question 3

Which of the following molecules is nonpolar?

Accepted Answer

CO$$_2$$

Question 4

What is the main source of attraction in a covalent bond?

Accepted Answer

Sharing of electrons between atoms

Question 5

Which of the following statements about molecular polarity is correct?

Accepted Answer

Molecular polarity depends on both bond polarity and molecular shape.

Question 6

A molecule with the formula AB$$_2$$ has a linear shape and both B atoms are identical. If the A-B bonds are polar, what is the overall polarity of the molecule?

Accepted Answer

The molecule is always nonpolar.

Question 7

Which of the following is a correct statement about intermolecular forces?

Accepted Answer

London dispersion forces are present in all molecules.

Question 8

What is the formal charge on the central atom in the Lewis structure of NH$$_4^+$$?

Accepted Answer

$$0$$

Question 9

Which of the following best explains why water (H$$_2O) is a $$polar molecule?

Accepted Answer

It has polar bonds and a bent molecular shape.

Question 10

Which of the following molecules would you expect to have the highest boiling point due to intermolecular forces?

Accepted Answer

NH$$_3$$

Question 11

Given the Lewis structure for SO$$_2$$, which VSEPR shape does it have?

Accepted Answer

Bent

Question 12

Which of the following is the correct name for PCl$$_5$$?

Accepted Answer

Phosphorus pentachloride

Question 13

Which of the following formulas corresponds to dinitrogen trioxide?

Accepted Answer

N$$_2O$_3$$

Question 14

Which of the following is a resonance structure?

Accepted Answer

A structure where electrons are delocalized and can be represented in multiple valid Lewis structures.

Question 15

Which of the following best describes the geometry of methane (CH$$_4) $$according to VSEPR theory?

Accepted Answer

Tetrahedral

Question 16

A molecule has a central atom with two lone pairs and two bonded atoms. What is the molecular shape?

Accepted Answer

Bent

Question 17

Which of the following is true about polar molecules?

Accepted Answer

They have an asymmetrical distribution of charge.

Question 18

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

Accepted Answer

N$$_2$$

Question 19

Which of the following best explains why CO$$_2 is $$nonpolar even though it contains polar bonds?

Accepted Answer

The molecule is linear and the bond dipoles cancel each other out.

Question 20

Which of the following is the correct formula for sulfur hexafluoride?

Accepted Answer

SF$$_6$$

Covalent Bonding, Polarity, and Molecular Structure: Study Guide

Study Guide - Practice Questions

Study Guide - Flashcards