Advertisements
Advertisements
प्रश्न
State whether the following is physical or chemical changes.
respiration in living beings —
Advertisements
उत्तर
chemical change,
APPEARS IN
संबंधित प्रश्न
Which of the following are chemical changes?
- Growth of a plant
- Rusting of iron
- Mixing of iron fillings and sand
- Cooking of food
- Digestion of food
- Freezing of water
- Burning of candle
Tick the most appropriate answer.
4. Chemical changes involve
- change in shape.
- change in size.
- change in molecular composition.
- none of these
Name a chemical change which takes place in presence of:
Tick (√) the correct alternative from the choice given for the following statement.
A substance which can not sublime is
Write true or false
Burning of paper and formation of curd are reversible changes.
Define a chemical change. Give two examples of the above changes.
Give three reasons why melting of wax, is considered a physical change while burning of a candle, a chemical change.
State what is meant by the term – interconversion of matter. Is interconversion of matter a physical change or a chemical change.
Change is the law of nature which occurs in everyday life.
State when a substance [i.e. matter] undergoes a kind of change.
Select the correct answer from the choice given below to complete the sentence
The matter is added or removed during a ____________ change.
