Chapter 9, Problem 70A

(a)

Interpretation Introduction

Interpretation: The prefix used to indicate the given number of atoms in the formula of a binary molecular compound is to be determined.

Concept Introduction: While naming the molecular compounds, the first element is named first followed by the rest in order. If an element is present more than once, it is represented by using suitable prefixes indicating those numbers.

Answer to Problem 70A

The prefix ‘−tri’ is used to indicate 3 while naming chemical compounds.

Explanation of Solution

If three atoms of an element are present in the formula of a binary molecular compound, the prefix ‘-tri’ is used for that element.

(b)

Interpretation Introduction

Interpretation: The prefix used to indicate the given number of atoms in the formula of a binary molecular compound is to be determined.

Concept Introduction: While naming the molecular compounds, the first element is named first followed by the rest in order. If an element is present more than once, it is represented by using suitable prefixes indicating those numbers.

Answer to Problem 70A

The prefix used to indicate 1 in naming chemical compounds is ‘mono’

Explanation of Solution

If a single atom of an element is present in the formula of a binary molecular compound, the prefix ‘-mono’ is used for that element.

(c)

Interpretation Introduction

Interpretation: The prefix used to indicate the given number of atoms in the formula of a binary molecular compound is to be determined.

Concept Introduction: While naming the molecular compounds, the first element is named first followed by the rest in order. If an element is present more than once, it is represented by using suitable prefixes indicating those numbers.

Answer to Problem 70A

The prefix ‘−di’ is used to indicate 2 while naming chemical compounds.

Explanation of Solution

If two atoms of an element are present in the formula of a binary molecular compound, the prefix ‘-di’ is used for that element. E.g. ${\text{CO}}_{\text{2}}$ is named carbon dioxide, and the prefix ‘di’ is used before the name of oxygen.

(d)

Interpretation Introduction

Interpretation: The prefix used to indicate the given number of atoms in the formula of a binary molecular compound is to be determined.

Concept Introduction: While naming the molecular compounds, the first element is named first followed by the rest in order. If an element is present more than once, it is represented by using suitable prefixes indicating those numbers.

Answer to Problem 70A

‘Hexa’ is the prefix used to indicate the number 6 in the naming of molecular compounds.

Explanation of Solution

If a chemical compound contains six atoms of the same element, the prefix ‘-Hexa' is used to denote them during naming. E.g. ${\text{SF}}_{\text{6}}$ is named sulfur hexachloride.

(e)

Interpretation Introduction

Interpretation: The prefix used to indicate the given number of atoms in the formula of a binary molecular compound is to be determined.

Concept Introduction: While naming the molecular compounds, the first element is named first followed by the rest in order. If an element is present more than once, it is represented by using suitable prefixes indicating those numbers.

Answer to Problem 70A

The prefix used to indicate 5 in the naming of chemical compounds is ‘penta’

Explanation of Solution

If five atoms of an element are present in the formula of a binary molecular compound, the prefix ‘-penta’ is used for that element.

(f)

Interpretation Introduction

Interpretation: The prefix used to indicate the given number of atoms in the formula of a binary molecular compound is to be determined.

Concept Introduction: While naming the molecular compounds, the first element is named first followed by the rest in order. If an element is present more than once, it is represented by using suitable prefixes indicating those numbers.

Answer to Problem 70A

‘Tetra’ is the prefix used to indicate the number 4 in the naming of molecular compounds.

Explanation of Solution

If a chemical compound contains four atoms of the same element, the prefix ‘-tetra’ is used to denote them at the time of naming.