Whether calcium chloride is a pure substance or not is to be explained. Concept introduction: A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point. An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

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Answer 1

Question

Chapter 2, Problem 2.3P

(a)

Interpretation Introduction

Interpretation:

Whether calcium chloride is a pure substance or not is to be explained.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

(b)

Interpretation Introduction

Interpretation:

Whether the octatomic molecule of sulfur is a pure substance or not is to be determined.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

(c)

Interpretation Introduction

Interpretation:

Whether baking powder composed of 26−30% sodium hydrogen carbonate and 30−35% calcium dihydrogen phosphate by mass is a pure substance or not is to be determined.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

(d)

Interpretation Introduction

Interpretation:

Whether cytosine, a component of DNA consisting of H, C, N and O atoms bonded in a specific arrangement, is a pure substance or not, is to be determined.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

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Answer 2

Question

Chapter 2, Problem 2.3P

(a)

Interpretation Introduction

Interpretation:

Whether calcium chloride is a pure substance or not is to be explained.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

(b)

Interpretation Introduction

Interpretation:

Whether the octatomic molecule of sulfur is a pure substance or not is to be determined.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

(c)

Interpretation Introduction

Interpretation:

Whether baking powder composed of 26−30% sodium hydrogen carbonate and 30−35% calcium dihydrogen phosphate by mass is a pure substance or not is to be determined.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

(d)

Interpretation Introduction

Interpretation:

Whether cytosine, a component of DNA consisting of H, C, N and O atoms bonded in a specific arrangement, is a pure substance or not, is to be determined.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

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Answer 3

Question

Chapter 2, Problem 2.3P

(a)

Interpretation Introduction

Interpretation:

Whether calcium chloride is a pure substance or not is to be explained.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

(b)

Interpretation Introduction

Interpretation:

Whether the octatomic molecule of sulfur is a pure substance or not is to be determined.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

(c)

Interpretation Introduction

Interpretation:

Whether baking powder composed of 26−30% sodium hydrogen carbonate and 30−35% calcium dihydrogen phosphate by mass is a pure substance or not is to be determined.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

(d)

Interpretation Introduction

Interpretation:

Whether cytosine, a component of DNA consisting of H, C, N and O atoms bonded in a specific arrangement, is a pure substance or not, is to be determined.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

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Answer 4

Question

Chapter 2, Problem 2.3P

(a)

Interpretation Introduction

Interpretation:

Whether calcium chloride is a pure substance or not is to be explained.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

(b)

Interpretation Introduction

Interpretation:

Whether the octatomic molecule of sulfur is a pure substance or not is to be determined.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

(c)

Interpretation Introduction

Interpretation:

Whether baking powder composed of 26−30% sodium hydrogen carbonate and 30−35% calcium dihydrogen phosphate by mass is a pure substance or not is to be determined.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

(d)

Interpretation Introduction

Interpretation:

Whether cytosine, a component of DNA consisting of H, C, N and O atoms bonded in a specific arrangement, is a pure substance or not, is to be determined.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

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Answer 5

Chapter 2, Problem 2.3P

(a)

Interpretation Introduction

Interpretation:

Whether calcium chloride is a pure substance or not is to be explained.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

(b)

Interpretation Introduction

Interpretation:

Whether the octatomic molecule of sulfur is a pure substance or not is to be determined.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

(c)

Interpretation Introduction

Interpretation:

Whether baking powder composed of 26−30% sodium hydrogen carbonate and 30−35% calcium dihydrogen phosphate by mass is a pure substance or not is to be determined.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

(d)

Interpretation Introduction

Interpretation:

Whether cytosine, a component of DNA consisting of H, C, N and O atoms bonded in a specific arrangement, is a pure substance or not, is to be determined.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

Answer 6

Chapter 2, Problem 2.3P

(a)

Interpretation Introduction

Interpretation:

Whether calcium chloride is a pure substance or not is to be explained.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

Answer 7

Chapter 2, Problem 2.3P

(a)

Interpretation Introduction

Interpretation:

Whether calcium chloride is a pure substance or not is to be explained.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

Answer 8

(b)

Interpretation Introduction

Interpretation:

Whether the octatomic molecule of sulfur is a pure substance or not is to be determined.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

Answer 9

(b)

Interpretation Introduction

Interpretation:

Whether the octatomic molecule of sulfur is a pure substance or not is to be determined.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

Answer 10

(c)

Interpretation Introduction

Interpretation:

Whether baking powder composed of 26−30% sodium hydrogen carbonate and 30−35% calcium dihydrogen phosphate by mass is a pure substance or not is to be determined.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

Answer 11

(c)

Interpretation Introduction

Interpretation:

Whether baking powder composed of 26−30% sodium hydrogen carbonate and 30−35% calcium dihydrogen phosphate by mass is a pure substance or not is to be determined.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

Answer 12

(d)

Interpretation Introduction

Interpretation:

Whether cytosine, a component of DNA consisting of H, C, N and O atoms bonded in a specific arrangement, is a pure substance or not, is to be determined.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

Answer 13

(d)

Interpretation Introduction

Interpretation:

Whether cytosine, a component of DNA consisting of H, C, N and O atoms bonded in a specific arrangement, is a pure substance or not, is to be determined.

Concept introduction:

A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.

An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.

Answer 14

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Answer 15

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Answer 16

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Answer 17

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