Chapter 1, Problem 1.23QP

(a)

Interpretation Introduction

Interpretation:

How some experiments in laboratory help to prove or disprove that the beaker contains same compound has to be described.

Concept Introduction:

Matter exists in different forms in different conditions as solids, liquids and gases. The characteristic identification of solids is their rigidity and they tend to maintain their shapes, when the outside forces are subjected to them. Both liquids and gases are fluids, they change their shapes when they subjected to the outside forces.

Physical Change:

A change in the form of matter but not in its chemical identity is called “physical change”. Changes in the physical state are the example of physical change.

Chemical Change:

A change in which one or more kinds of matter are transformed into a new or several kinds of matter are called “chemical reaction or chemical change”. For example, iron combine with oxygen it forms a new material called “rust” and this change is known as “rusting of iron”.

(b)

Interpretation Introduction

Interpretation:

Which will be easier to prove that the compound are same or different has to be given.

Concept Introduction:

Matter exists in different forms in different conditions as solids, liquids and gases. The characteristic identification of solids is their rigidity and they tend to maintain their shapes, when the outside forces are subjected to them. Both liquids and gases are fluids, they change their shapes when they subjected to the outside forces.

Physical Change:

A change in the form of matter but not in its chemical identity is called “physical change”. Changes in the physical state are the example of physical change.

Chemical Change:

A change in which one or more kinds of matter are transformed into a new or several kinds of matter are called “chemical reaction or chemical change”. For example, iron combine with oxygen it forms a new material called “rust” and this change is known as “rusting of iron”.

(c)

Interpretation Introduction

Interpretation:

Among the experiments that are listed which one is more convincing has to be explained.

Concept Introduction:

Matter exists in different forms in different conditions as solids, liquids and gases. The characteristic identification of solids is their rigidity and they tend to maintain their shapes, when the outside forces are subjected to them. Both liquids and gases are fluids, they change their shapes when they subjected to the outside forces.

Physical Change:

A change in the form of matter but not in its chemical identity is called “physical change”. Changes in the physical state are the example of physical change.

Chemical Change:

A change in which one or more kinds of matter are transformed into a new or several kinds of matter are called “chemical reaction or chemical change”. For example, iron combine with oxygen it forms a new material called “rust” and this change is known as “rusting of iron”.

(d)

Interpretation Introduction

Interpretation:

The explanation given by a friend claiming the two compounds to be the same has to be justified.

Concept Introduction:

Matter exists in different forms in different conditions as solids, liquids and gases. The characteristic identification of solids is their rigidity and they tend to maintain their shapes, when the outside forces are subjected to them. Both liquids and gases are fluids, they change their shapes when they subjected to the outside forces.

Physical Change:

A change in the form of matter but not in its chemical identity is called “physical change”. Changes in the physical state are the example of physical change.

Chemical Change:

A change in which one or more kinds of matter are transformed into a new or several kinds of matter are called “chemical reaction or chemical change”. For example, iron combine with oxygen it forms a new material called “rust” and this change is known as “rusting of iron”.