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प्रश्न
Digestion of food is a physical change.
विकल्प
True
False
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उत्तर
Digestion of food is a physical change- False.
Correct statement
Digestion of food is a chemical change.
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संबंधित प्रश्न
Fill in the blank.
Heat is .................... by a gas during the process of condensation.
Melting of solid (wax) is a physical change.
State the various conditions that favour the process of evaporation.
State whether the following is physical or chemical changes.
shaping a piece of glass —
True or false
Change of seasons is a non-periodic change.
State which of the following pertain to – chemical changes.
- Substance retains its identity.
- The change is permanent.
- No new substance is formed.
- Is easily reversible.
- Produces one or more new substances by a change in its composition.
- The change is temporary.
- The composition and properties of the original substance are not altered.
Give the reason why the following is considered as chemical changes.
An iron nail kept open in the atmosphere rusts.
In a solution of salt in water, water is the solute
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.
Natural changes which take place in nature on their own, are beyond the control of human being.
