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प्रश्न
State whether the following is physical or chemical changes.
respiration in living beings —
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उत्तर
chemical change,
APPEARS IN
संबंधित प्रश्न
Write true or false for the statement.
Dissolving of solute in a solvent and rusting of iron are both physical changes.
Write short answer.
Name two reversible changes.
A physical change is temporary. Explain.
State the various conditions that favour the process of evaporation.
Solve this crossword by using the clues that follow.
Across
1. Energy in the form of sunlight is absorbed by the green plants in this process.
4. The reddish-brown substance formed over iron in the presence of oxygen and moisture.
5. This change is permanent and irreversible.
6. The process in which a solid directly changes into gaseous state.
Down
1. It is the change that takes place in case of swinging pendulum of a clock.
2. Occurrence of this is a non-periodic change as well as a natural change.
3. It is a physical change
State whether the following is physical or chemical changes.
Slaking of lime —
Fill in the blank
Changes that occur in nature are called ______
Which of the following are physical changes and which are chemical changes ?
Freezing of water
A change in which matter undergoes a change but the total mass of the substance is unaltered is a ______ change.
Analogy:
Melting of ice: Physical change.
Popping of popcorn: ______.
