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प्रश्न
State whether the following is physical or chemical changes.
heating a mixture of iron filings and sulphur—
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उत्तर
chemical change.
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संबंधित प्रश्न
Explain the following giving an example.
Pure substance
Classify the changes involved in the following process as physical or chemical changes:
Photosynthesis
Changes in which only ______ properties of a substance change are called physical changes.
Write true or false for the statement.
Burning of paper and formation of curd are reversible changes
Define physical change. Give two examples for the above changes.
Fill in the blank
Revolution of the earth around the sun is a ________ change.
Which of the following are physical changes ?
- melting of iron metal
- rusting of iron metal
- bending of an iron rod
- drawing a wire of iron metal
State whether the following statement is true or false. If false write the correct statement.
Melting of ice is an exothermic, irreversible chemical change.
______ is the Universal Solvent.
Give an example to justify the statement that physical changes can be reversible as well as irreversible.
