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प्रश्न
Select the chemical changes from the following list of changes
Butter turning rancid
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उत्तर
Butter turning rancid is a CHEMICAL change as composition changes, a new substance with new properties is formed, irreversible and permanent change.
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संबंधित प्रश्न
Write short answer.
Name two reversible changes.
What are reversible and irreversible changes ? Give one example for each.
State whether the following is physical or chemical changes.
lightning —
Write true or false
Decomposition of leaves is a fast change.
Photosynthesis cannot take place at night.
Distinguish between the following.
Physical change and chemical change
State why addition of sodium chloride to water is considered a physical change, while addition of dilute sulphuric acid to zinc is considered a chemical 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.
Analogy:
Melting of ice: Physical change.
Popping of popcorn: ______.
Which of the following is a physical change?
