Question 1

Which of the following best describes a covalent bond?

Accepted Answer

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

Question 2

What is the correct name for the molecular compound $$\mathrm{$$NCl_3$$}$$?

Accepted Answer

Nitrogen trichloride

Question 3

Given the name 'diboron trioxide,' what is the correct chemical formula?

Accepted Answer

$$\mathrm{B_2O_3}$$

Question 4

Which of the following compounds is ionic?

Accepted Answer

$$\mathrm{KCl}$$

Question 5

What is the correct Lewis structure for $$\mathrm{SO_2$}$$?

Accepted Answer

A structure with S as the central atom, one double bond to O, one single bond to O, and one lone pair on S.

Question 6

Which of the following molecules is nonpolar?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 7

What is the molecular shape of $$\mathrm{CH_4$}$$ according to VSEPR theory?

Accepted Answer

Tetrahedral

Question 8

Which of the following statements about electronegativity is correct?

Accepted Answer

Electronegativity decreases down a group and increases across a period.

Question 9

A bond with an electronegativity difference of 1.0 is classified as:

Accepted Answer

Polar covalent

Question 10

Which intermolecular force is the strongest?

Accepted Answer

Ionic bonds

Question 11

Which of the following molecules exhibits hydrogen bonding?

Accepted Answer

$$\mathrm{NH_3$}$$

Question 12

What is the correct name for $$\mathrm{P_2O_5}$$?

Accepted Answer

Diphosphorus pentoxide

Question 13

Which of the following best explains why $$\mathrm{H_2O} is a $$polar molecule?

Accepted Answer

It has polar bonds and a bent shape, so the dipoles do not cancel.

Question 14

Which of the following compounds would have the lowest melting point?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 15

What is the main intermolecular force present in liquid $$\mathrm{CO_2$}$$?

Accepted Answer

Dispersion forces

Question 16

Which of the following is the correct formula for dichlorine heptoxide?

Accepted Answer

$$\mathrm{Cl_2O_7}$$

Question 17

A molecule with three bonds and one lone pair on the central atom will have which shape according to VSEPR theory?

Accepted Answer

Trigonal pyramidal

Question 18

Which of the following statements about dispersion forces is correct?

Accepted Answer

They are caused by temporary dipoles in nonpolar molecules.

Question 19

Which of the following molecules is expected to be polar?

Accepted Answer

$$\mathrm{NH_3$}$$

Question 20

What is the correct formula for phosphorus trichloride?

Accepted Answer

$$\mathrm{$$PCl_3$$}$$

Molecular Compounds, Lewis Structures, Bond Polarity, and Intermolecular Forces

Study Guide - Practice Questions