Whether the dew condensing on a leaf can be reversed by changing the temperature or not is to be determined. Concept introduction: The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change. Ice ( water ) → liquid ( water ) The physical change can be represented as follows: The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change. Paper ( cellulose ) → ash ( carbon ) The representation of chemical change is as follows:

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Answer 1

Question

Chapter 1, Problem 1.7P

(a)

Interpretation Introduction

Interpretation:

Whether the dew condensing on a leaf can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

(b)

Interpretation Introduction

Interpretation:

Whether an egg turning hard due to boiling can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

(c)

Interpretation Introduction

Interpretation:

Whether the melting of ice cream can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

(d)

Interpretation Introduction

Interpretation:

Whether a spoonful of the batter cooking on a hot griddle can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

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Answer 2

Question

Chapter 1, Problem 1.7P

(a)

Interpretation Introduction

Interpretation:

Whether the dew condensing on a leaf can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

(b)

Interpretation Introduction

Interpretation:

Whether an egg turning hard due to boiling can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

(c)

Interpretation Introduction

Interpretation:

Whether the melting of ice cream can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

(d)

Interpretation Introduction

Interpretation:

Whether a spoonful of the batter cooking on a hot griddle can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

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Answer 3

Question

Chapter 1, Problem 1.7P

(a)

Interpretation Introduction

Interpretation:

Whether the dew condensing on a leaf can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

(b)

Interpretation Introduction

Interpretation:

Whether an egg turning hard due to boiling can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

(c)

Interpretation Introduction

Interpretation:

Whether the melting of ice cream can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

(d)

Interpretation Introduction

Interpretation:

Whether a spoonful of the batter cooking on a hot griddle can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

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Answer 4

Question

Chapter 1, Problem 1.7P

(a)

Interpretation Introduction

Interpretation:

Whether the dew condensing on a leaf can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

(b)

Interpretation Introduction

Interpretation:

Whether an egg turning hard due to boiling can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

(c)

Interpretation Introduction

Interpretation:

Whether the melting of ice cream can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

(d)

Interpretation Introduction

Interpretation:

Whether a spoonful of the batter cooking on a hot griddle can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

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Answer 5

Chapter 1, Problem 1.7P

(a)

Interpretation Introduction

Interpretation:

Whether the dew condensing on a leaf can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

(b)

Interpretation Introduction

Interpretation:

Whether an egg turning hard due to boiling can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

(c)

Interpretation Introduction

Interpretation:

Whether the melting of ice cream can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

(d)

Interpretation Introduction

Interpretation:

Whether a spoonful of the batter cooking on a hot griddle can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

Answer 6

Chapter 1, Problem 1.7P

(a)

Interpretation Introduction

Interpretation:

Whether the dew condensing on a leaf can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

Answer 7

Chapter 1, Problem 1.7P

(a)

Interpretation Introduction

Interpretation:

Whether the dew condensing on a leaf can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

Answer 8

(b)

Interpretation Introduction

Interpretation:

Whether an egg turning hard due to boiling can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

Answer 9

(b)

Interpretation Introduction

Interpretation:

Whether an egg turning hard due to boiling can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

Answer 10

(c)

Interpretation Introduction

Interpretation:

Whether the melting of ice cream can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

Answer 11

(c)

Interpretation Introduction

Interpretation:

Whether the melting of ice cream can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

Answer 12

(d)

Interpretation Introduction

Interpretation:

Whether a spoonful of the batter cooking on a hot griddle can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

Answer 13

(d)

Interpretation Introduction

Interpretation:

Whether a spoonful of the batter cooking on a hot griddle can be reversed by changing the temperature or not is to be determined.

Concept introduction:

The change that takes place only in state or appearance and not in the composition is known as physical change. The atoms or the molecules of a substance do not change their identity when a substance undergoes a physical change. The substance remains the same before and after the change. Physical change brings change in physical properties only. For example, the melting of ice is a physical change.

Ice(water)→liquid(water)

The physical change can be represented as follows:

The change that takes place in the composition is known as chemical change. The atoms or the molecules of the substance rearrange and transformed into a new substance. A chemical change can change physical as well as chemical properties of a substance. For example, the burning of paper is a chemical change.

Paper(cellulose)→ash(carbon)

The representation of chemical change is as follows:

Answer 14

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Answer 15

Expert Solution & Answer

Answer 16

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Answer 17

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