Advertisements
Advertisements
प्रश्न
Photosynthesis is a natural process by which green plants manufacture food in the presence of sunlight.
State the conclusions which can be drawn, to represent photosynthesis as a physical or a chemical change.
Advertisements
उत्तर
Carbon dioxide and water cannot be obtained back from glucose and oxygen hence it is a chemical change.
APPEARS IN
संबंधित प्रश्न
Write true or false for the statement.
Burning of paper and formation of curd are reversible changes
True or false
In a physical change no net energy change is involved.
Fill in the blank with the appropriate word of the statement given below:
If a change is permanent and irreversible it is considered a _________ change.
Name the following:
The type of change physical or chemical involved – ‘when a substance undergoes a change in state, colour or size’.
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.
Select the chemical changes from the following list of changes
Butter turning rancid
Name the following.
The product of the chemical change in keeping a polished iron nail exposed to the atmosphere.
Tearing of sheet of paper into pieces is ______ By the process of Heating of water, change.
Analogy:
Melting of ice: Physical change.
Popping of popcorn: ______.
Give two examples for the following case:
Physical changes which are reversible
