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प्रश्न
True or false
In a physical change no net energy change is involved.
पर्याय
True
False
उत्तर
True
APPEARS IN
संबंधित प्रश्न
State the differences between a physical change and a chemical change.
Fill in the blank.
Growing of a seedling into a plant is _______ change.
State whether the following is physical or chemical changes.
lightning —
Tick the most appropriate answer.
Physical changes are
Photosynthesis cannot take place at night.
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.
What will you take into account while identifying the following?
A physical change in a substance.
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
Change of seasons
Analogy:
Melting of ice: Physical change.
Popping of popcorn: ______.
