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प्रश्न
True or false?
In a chemical change, rearrangement of molecules and atoms involves some energy changes.
विकल्प
True
False
उत्तर
True
APPEARS IN
संबंधित प्रश्न
What do you observe when :
a piece of paper is burnt
What do you observe when :
a spoon of sugar is heated in a pan
State whether the following is physical or chemical changes.
burning of wood -
State whether the following is physical or chemical changes.
Boiling of an egg —
Tick (√) the correct alternative from the choice given for the following statement
When sugar is heated, its colour changes into
Fill in the blank
An earthquake is a _______ change.
What role does energy play in initiating a chemical change ?
Give reason.
While purchasing canned food, its expiry date should be checked.
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?
