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प्रश्न
Physical Change: Boiling::Chemical Change: ______.
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उत्तर
Physical Change: Boiling::Chemical Change: Burning
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संबंधित प्रश्न
State whether the following is physical or chemical changes.
(energy produced) dissolving sugar in water —
True or false
Change of seasons is a non-periodic 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
Define a chemical change. Give two examples of the above changes.
Fill in the blank.
The process of a liquid changing into a solid is called ________
Differentiate between a physical change and a chemical change with reference to – Nature of change is temporary and reversible or permanent and irreversible.
Select the chemical changes from the following list of changes
The carbon cycle.
Assertion: Burning of wood log to charcoal is a physical change.
Reason: The products formed of burning a piece of wood can be easily converted back to wood log.
State whether the following statement is true or false:
Anaerobic bacteria digest animal waste and produce biogas.
Mention some of the different conditions needed for chemical changes to occur.
