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प्रश्न
State four differences between physical and chemical changes.
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उत्तर
| Physical change | Chemical change |
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संबंधित प्रश्न
Write true or false
Cutting of paper into pieces is a chemical change.
Write true or false
Earthquake is a desirable change.
Tick (√) the correct alternative from the choice given for the following statement.
A substance which can not sublime is
Classify the following as physical or chemical change :
Formation of curd from milk
Classify the following as a physical or a chemical change.
Burning of paper
Ice kept in a beaker, slowly melts and turns into water. The water in the beaker on solidification is freezing turns back to ice. Give four reasons why the change from ice to water and water back to ice is considered a physical change.
Ammonium chloride is also a sublimable solid. Give a reason why the sublimation of ammonium chloride involves a physical and a chemical change.
Select the chemical changes from the following list of changes
The carbon cycle.
Assertion: The explosion of fire cracker is a physical change.
Reason: A physical change is a reversible change.
State whether the following statement is true or false:
Stretching of rubber bands is not a physical change.
