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Byju's Answer
Standard IV
Science
Boiling
Boiling invol...
Question
Boiling involves change in the physical state of substance.
A
True
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B
False
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Solution
The correct option is
A
True
Boiling is the process by which liquid turns into vapour when it reaches its boiling point.
So, we can say that boiling process involves change in the physical state of the substance i.e., from liquid to vapour.
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Q.
During boiling, the physical state of a substance changes from:
Q.
A physical change involves a change in the state of the substance.
Q.
Matter undergoes a change. The changes are of two types : Physical and chemical change. A physical change is a change that involves only a change in the physical state of matter.
Its chemical properties remain the same. Usually increasing the temperature of applying pressure or both brings about a physical change. On reversing the condition, i.e., reducing the temperature or reducing the pressure or both, the original state of matter is restored. In other words, physical changes are reversible. A chemical change is a change that involves a change in the chemical composition of matter. A new substance is formed. In a chemical change, the chemical and physical properties of the substance is formed. In a chemical change, the chemical and physical properties of the substance formed will be different from the original substance.
When zinc carbonate is heated and cooled, the change(s) that are observed are :
Q.
Matter undergoes a change. The changes are of two types: Physical and chemical change.
A physical change is a change that involves only a change in the physical state of matter.
Its chemical properties remain the same. Usually increasing the temperature or applying pressure or both bring about a physical change. On reversing the condition, that is reducing the temperature or reducing the pressure or both, the original state of matter is restored. In other words, physical changes are reversible.
A chemical change is a change that involves a change in the chemical composition of matter. A new substance is formed. In a chemical change, new chemical and physical properties of the substance are formed. In a chemical change, the chemical and physical properties of the substance formed will be different from the original substance.
In a chemical change, the properties that change are :
Q.
Assertion :Physical change of a substance involves change in all properties and composition of its molecules Reason: The change of a substance with alteration of composition of its molecules without any change in its specific property is called physical change
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