
Boiling water is a ________ change because _________.
A.Physical, the gaseous water produced is chemically identical to the liquid water the process began with
B.Physical, the water was disappeared
C.Chemical, the heat was required for the change
D.Chemical, the process produced a gas
Answer
486.9k+ views
Hint: In chemistry, physical and chemical changes occur. Due to these changes, chemical substances change their form or state and produce a new product. In these changes, environmental conditions play a big role.
Complete step by step answer:
Let's have a look at physical and chemical change.
As we know that environmental conditions like temperature, pressure, moisture, etc helps to change a substance from one form to another form.
Physical change - When a chemical substance changes its state but never changes its composition, structure that is known as physical change. Or we can say that in it, the physical properties of substance change. And after this change, we can get back a particular substance in its original state.
Chemical change - In this change, a chemical substance changes from one to another and cannot back into the original state that is known as chemical change. In it, chemical substance composition and structure change. Substance combined with others and form a new one or decompose in another.
So, according to the above definitions, we can see that boiling of water is a physical change because gaseous water and liquid water both have the same chemical formula that is and both have the same molecular structure too. One more thing is, we can get back vapor into the water by the condensation process.
Therefore, option A is the correct answer here.
Note: In these changes, a chemical reaction may be exothermic or endothermic. Exothermic - When heat is produced during the chemical reaction. Endothermic - When heat is required in a chemical reaction. Condensation - when the gas state of a substance changes into a liquid.
Complete step by step answer:
Let's have a look at physical and chemical change.
As we know that environmental conditions like temperature, pressure, moisture, etc helps to change a substance from one form to another form.
Physical change - When a chemical substance changes its state but never changes its composition, structure that is known as physical change. Or we can say that in it, the physical properties of substance change. And after this change, we can get back a particular substance in its original state.
Chemical change - In this change, a chemical substance changes from one to another and cannot back into the original state that is known as chemical change. In it, chemical substance composition and structure change. Substance combined with others and form a new one or decompose in another.
So, according to the above definitions, we can see that boiling of water is a physical change because gaseous water and liquid water both have the same chemical formula that is
Therefore, option A is the correct answer here.
Note: In these changes, a chemical reaction may be exothermic or endothermic. Exothermic - When heat is produced during the chemical reaction. Endothermic - When heat is required in a chemical reaction. Condensation - when the gas state of a substance changes into a liquid.
Recently Updated Pages
Master Class 9 General Knowledge: Engaging Questions & Answers for Success

Master Class 9 English: Engaging Questions & Answers for Success

Master Class 9 Science: Engaging Questions & Answers for Success

Master Class 9 Social Science: Engaging Questions & Answers for Success

Master Class 9 Maths: Engaging Questions & Answers for Success

Class 9 Question and Answer - Your Ultimate Solutions Guide

Trending doubts
Difference Between Plant Cell and Animal Cell

What is the Full Form of ISI and RAW

Fill the blanks with the suitable prepositions 1 The class 9 english CBSE

Discuss what these phrases mean to you A a yellow wood class 9 english CBSE

Name 10 Living and Non living things class 9 biology CBSE

Name the states which share their boundary with Indias class 9 social science CBSE
