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प्रश्न
State whether the following is physical or chemical changes.
photosynthesis —
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उत्तर
chemical change.
APPEARS IN
संबंधित प्रश्न
State whether the following is physical or chemical changes.
water cycle in nature —
Write true or false
Earthquake is a desirable change.
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.
Classify the following as a physical or a chemical change.
Butter getting rancid
Fill in the blank.
There is no change in the _____________of the substance during a physical change.
Differentiate between a physical change and a chemical change with reference to – Energy change taking place during the respective change.
State what is meant by the term – interconversion of matter. Is interconversion of matter a physical change or a chemical change.
Give the reason why the following is considered as chemical changes.
Sulphur when burnt in air evolves a gaseous acidic product.
Filling up a balloon with hot air is a _______ change.
Classify the following as physical or chemical properties
Metallic sodium is soft enough to be cut with a knife.
