The chemical composition of the substance undergoing a physical change remains the same. Give me an example

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Solution

For ex the melting of ice. Ice gets converted to water that is from solid state to liquid state. Here the physical state gets converted not the chemical composition. In both the gases it remains same as H₂O

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Q. Properties of physical and chemical changes are given below. Sort the properties of physical and chemical changes in the correct column.

1. New substances are formed.
2. Precipitation is an example of this.
3. Products have new composition.
4. Composition of substance remains same.
5. It is usually permanent.
6. It is usually temporary.
7. Burning of LPG is an example of this.
8. It is reversible.

Physical change	Chemical change
1. 2. 3. 4.	5. 6. 7. 8.

Does the physical state of a substance always change during a chemical change? Give one example in favour and one example against the statement with proper reasoning.

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. 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 :

The interconversion of a substance from one state of matter to another is an example of ___ change (physical/chemical).

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The chemical composition of the substance undergoing a physical change remains the same. Give me an example

For ex the melting of ice. Ice gets converted to water that is from solid state to liquid state. Here the physical state gets converted not the chemical composition. In both the gases it remains same as H2O

For ex the melting of ice. Ice gets converted to water that is from solid state to liquid state. Here the physical state gets converted not the chemical composition. In both the gases it remains same as H₂O