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प्रश्न
Fill in the blank
Chemical change occurs as a result of __________ between two substances.
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उत्तर
Chemical change occurs as a result of rearrangement of atoms between two substances.
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संबंधित प्रश्न
Write true or false
Cutting of paper into pieces is a chemical change.
Fill in the blank
Changes that occur in nature are called ______
Classify the following as physical or chemical change :
Condensation of steam
Give the main differences between physical changes and chemical changes.
Which of the following are physical changes and which are chemical changes ?
Rusting of iron
Name the following:
The term involved in the change of state from – ‘water to ice’ – which is a physical 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.
Distinguish physical and chemical changes.
______ is the substance that is dissolved in a solvent.
Gas exists in three states as solid, liquid, and gas.
