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प्रश्न
Fill in the blank
Chemical change occurs as a result of __________ between two substances.
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उत्तर
Chemical change occurs as a result of rearrangement of atoms between two substances.
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संबंधित प्रश्न
Changes in which only ______ properties of a substance change are called physical changes.
Fill in the blank.
An earthquake is a .................. change.
Write true or false for the statement
A natural change can also be a desirable change
Write short answer.
Sublimation is classified as a physical change. Why ?
Write true or false
Rusting of iron is a chemical change.
Tick (√) the correct alternative from the choice given for the following statement.
A substance which can not sublime is
Write true or false
Deforestation is a man-made change.
Which of the following are chemical changes ?
- decaying of wood
- burning of wood
- sawing of wood
- hammering of nail into wood
Give three reasons why melting of wax, is considered a physical change while burning of a candle, a chemical change.
A change in which matter undergoes a change but the total mass of the substance is unaltered is a ______ change.
