Chemical Bonding — Test Answers

In water, HNO sub 3 produces cap h raised to the plus power ions. Which is the name for HNO sub 3 in an aqueous solution?

A

nitrous acid

B

saltpetre

C

nitric acid

D

hydrogen nitrate

2

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What do the broken lines connected to hydrogen atoms represent in this diagram?

A

the strongest intermolecular forces

B

the strongest intramolecular forces

C

the weakest intermolecular forces

D

the weakest intramolecular forces

3

What will most likely happen when these molecules get closer?

A

An induced dipole will be produced in the molecule on the right.

B

An induced dipole will be produced in the molecule on the left.

C

The molecules will repel each other because of a dipole-dipole interaction.

D

The molecules will attract each other because of a dipole-dipole interaction.

4

Which compound has the highest melting point?

A

Al sub 2 open paren CO sub 3 close paren sub 3

B

cap h sub 2 cap o

C

cap c sub 12 cap h sub 22 cap o sub 11

D

cap c sub 8 cap h sub 18

5

An element has six valence electrons available for bonding. Which group of the periodic table does this element most likely belong to?

A

group 18

B

group 2

C

group 16

D

group 4

6

Which element is likely to be the most brittle?

A

platinum

B

zinc

C

selenium

D

cobalt

7

Which statement describes covalent bases?

A

They are named the same as ionic compounds.

B

They are often amines.

C

They produce hydrogen ions.

D

They have hydroxide ions.

8

Which is the name for SiO sub 2 ?

A

silicon dioxide

B

disilicon dioxygen

C

silicon trioxygen

D

monosilicon oxide

9

How do ionic bonds affect the properties of ionic compounds?

A

The bonds strongly hold ions together, reducing the boiling point.

B

The bonds prevent ions from moving throughout the crystal, so a solid ionic compound is a poor conductor.

C

The bonds prevent electrons from moving throughout the crystal, so a solid ionic compound is a good conductor.

D

The bonds weakly hold ions together, increasing the melting point.

10

Which statement best describes London dispersion forces?

A

attractive intermolecular forces

B

repulsive intermolecular forces

C

attractive intramolecular forces

D

repulsive intramolecular forces

11

Which statement best describes the effect of low ionization energies and low electronegativities on metallic bonding?

A

The valence electrons move closer to the nuclei.

B

The valence electrons stay in a single orbital.

C

The valence electrons break free of the crystals.

D

The valence electrons are easily delocalized.

12

Which is the Lewis structure for cap h sub 3 PO sub 4 ?

A

Image with description A chemical structure diagram shows a central phosphorus (P) atom. Above the P atom, a double bond connects to an oxygen (O) atom. This oxygen atom has two dots above it, two dots to its left and two dots to its right. To the left of the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots above it and two dots below it. To the left of this oxygen atom, a single bond connects to a hydrogen (H) atom. To the right of the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots above it and two dots below it. To the right of this oxygen atom, a single bond connects to a hydrogen (H) atom.

B

Image with description A chemical structure diagram shows a central phosphorus (P) atom. Above the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots above it, and is single-bonded to a hydrogen (H) atom to its left and another hydrogen (H) atom to its right. To the left of the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots above it and two dots below it. To the right of the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots above it and two dots below it. Below the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots to its left and two dots to its right, and is single-bonded to a hydrogen (H) atom below it.

C

Image with description A chemical structure diagram shows a central phosphorus (P) atom. Above the P atom, a single bond connects to a hydrogen (H) atom. To the left of the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots above it and two dots below it, and is single-bonded to a hydrogen (H) atom to its left. To the right of the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots above it and two dots below it, and is single-bonded to a hydrogen (H) atom to its right. Below the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots to its left, two dots to its right and two dots below it.

D

Image with description A chemical structure diagram shows a central phosphorus (P) atom. Above the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots above it, and is single-bonded to a hydrogen (H) atom to its left and another hydrogen (H) atom to its right. To the left of the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots above it and two dots below it. To the right of the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots above it and two dots below it. Below the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots to its left and two dots to its right, and is single-bonded to a hydrogen (H) atom below it.

13

What is the chemical formula for zinc (II) phosphate?

A

Zn times open paren PO sub 4 close paren

B

Zn sub 3 open paren PO sub 4 close paren sub 2

C

Zn open paren NO sub 3 close paren sub 2

D

Zn sub 3 cap p sub 2

14

Which statement best describes the properties of metals?

A

They can be flattened and do not conduct heat well.

B

They conduct electricity well and are brittle.

C

They are dull and are good electrical insulators.

D

They are shiny and bend without breaking.

15

What is the name of the ionic compound CaO ?

A

calcium oxide

B

calcium(I) oxide

C

calcium oxygen

D

calcium(II) oxide

16

Lewis structures cannot

A

show the location of bonds.

B

show the number of valence electrons.

C

show the strength of bonds.

D

show how many bonds are present in a molecule.

17

What is the ratio of Al raised to the 3 plus power ions to cap s raised to the 2 minus power ions in a neutral compound?

A

ratio of 1 to 1

B

ratio of 3 to 2

C

ratio of 2 to 3

D

ratio of 2 to 1

18

Which formula represents the compound commonly known as phosphine with IUPAC name phosphorus trihydride?

A

PH

B

PH sub 2

C

PH sub 3

D

PH sub 4

19

Which statement is true about ionic compounds?

A

Ionic compounds have varying solubilities in water.

B

Solid ionic compounds are good conductors of electricity.

C

Ionic compounds have very low melting points.

D

Ionic compounds are very easy to bend.

20

Based on its location in the periodic table, what can most likely be predicted about phosphorus?

A

It has four valence electrons.

B

It has three valence electrons.

C

It has five valence electrons.

D

It has six valence electrons.

Chemical Bonding — Test Answers

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