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प्रश्न
True or false?
During a physical change energy is either given out or absorbed by the system.
पर्याय
True
False
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उत्तर
True
APPEARS IN
संबंधित प्रश्न
What do you observe when :
solid ammonium chloride is heated
State whether the following is physical or chemical changes.
Boiling of an egg —
True or false?
In a chemical change, rearrangement of molecules and atoms involves some energy changes.
Melting of solid (wax) is a physical change.
Distinguish between the following.
Natural change and man-made change
Give reason.
While purchasing canned food, its expiry date should be checked.
Fill in the blanks with the appropriate words of the statement given below:
Chemical changes may involve exchange of energy in the form of __________ and _________.
How can a change occur in a substance?
Observe the picture containing a kettle and note that it has salt water in it and answer the following questions:
- What is name of the process that is done to the kettle?
- What will happen to the content of the kettle?
- What kind of change is occurring on the cold surface of the metal plate?
- What can you say about the quality of water that is obtained in the beaker?
______ is the process in which something becomes different from what it was earlier.
