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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement.
A substance which can not sublime is
पर्याय
iodine
camphor
sugar
dry ice
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उत्तर
sugar
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Burning of paper and wood
Dissolving salt in water is a reversible change.
Fill in the blank
Chemical change occurs as a result of __________ between two substances.
State whether the following is physical or chemical changes.
glowing of a bulb -
State whether the following is physical or chemical changes.
water cycle in nature —
Classify the following as physical or chemical changes :
- Cooking of food
- Boiling of water
- Cutting of trees
- D0issolving salt in water
- Digestion of food
- Melting of ice
Select the chemical changes from the following list of changes
Preparation of carbon dioxide from calcium carbonate & dilute hydrochloric acid.
When a woolen yarn is knitted to get a sweater, the change can be classified as ____________.
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Do you think rust is different from iron?
Mention some of the different conditions needed for chemical changes to occur.
