Question 1

Which of the following compounds is an ionic compound?

Accepted Answer

NaCl

Question 2

What is the correct formula for the phosphate ion?

Accepted Answer

$\mathrm{PO_4^{3-}}$

Question 3

Which of the following molecules is nonpolar?

Accepted Answer

CO\_2

Question 4

A compound contains only hydrogen and oxygen. Which of the following is a molecular element?

Accepted Answer

O\_2

Question 5

Which of the following best describes the bonding in sodium sulfate ($\mathrm{Na_2SO_4}$)?

Accepted Answer

Ionic bonding between Na\^+ and SO\_4^{2-}, covalent bonding within SO\_4^{2-}

Question 6

Which of the following ions is polyatomic and has a negative charge?

Accepted Answer

CO\_3^{2-}

Question 7

What is the molecular geometry of methane ($\mathrm{CH_4}$) according to VSEPR theory?

Accepted Answer

Tetrahedral

Question 8

How many sigma ($\sigma$) and pi ($\pi$) bonds are present in the molecule carbon dioxide ($\mathrm{CO_2}$)?

Accepted Answer

2 $\sigma$, 2 $\pi$

Question 9

Which of the following is the correct name for the ion $\mathrm{ClO_3^-}$?

Accepted Answer

Chlorate

Question 10

A molecule has the formula $\mathrm{NH_3}$. What is its molecular shape and is it polar or nonpolar?

Accepted Answer

Trigonal pyramidal, polar

Question 11

Which of the following statements about ionic compounds is TRUE?

Accepted Answer

They conduct electricity when dissolved in water.

Question 12

Which of the following ions is present in household bleach?

Accepted Answer

ClO\^- (hypochlorite)

Question 13

Which of the following molecules contains both sigma and pi bonds?

Accepted Answer

O\_2

Question 14

What is the correct formula for the ammonium ion?

Accepted Answer

$\mathrm{NH_4^+}$

Question 15

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

Accepted Answer

It has a bent molecular shape and an uneven distribution of electrons.

Question 16

Which of the following ions is found in baking soda?

Accepted Answer

HCO\_3^- (bicarbonate)

Question 17

A molecule has a central atom with two bonding pairs and two lone pairs. What is its molecular geometry?

Accepted Answer

Bent

Question 18

Which of the following is the correct formula for the cyanide ion?

Accepted Answer

$\mathrm{CN^-}$

Question 19

Which of the following molecules has a trigonal planar geometry?

Accepted Answer

BF\_3

Question 20

A student mixes solutions of calcium chloride and sodium carbonate. What precipitate forms?

Accepted Answer

CaCO\_3

Study Guide: Chapter 5

Study Guide - Practice Questions