Advertisements
Advertisements
प्रश्न
Name a chemical change which takes place in presence of:
टिप्पणी लिखिए
Advertisements
उत्तर
Heat:
- Burning of paper.
- Cooking of food need heat.
Light :
- Formation of food by plants i.e. photosynthesis need light.
- Hydrogen and chlorine react in presence of light
Electricity:
- Water breaks into hydrogen and oxygen on passing electricity.
- Sodium chloride solution breaks up into its components sodium and Chlorine on passing electric current through sodium chloride solution.
shaalaa.com
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
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
Dissolving salt in water is a reversible change.
Write short answer.
Give an example of desirable change which can also be undesirable
A burning candle shows both physical and chemical changes. Explain ?
State whether the following is physical or chemical changes.
(energy produced) dissolving sugar in water —
True or false
Is the process of digestion a physical change?
Fill in the blank
Heat is ________ by a gas during the process of condensation.
Name two reversible changes.
Name the following.
The product obtained during a physical change when water converts from a liquid into a solid.
Sublimation of Iodine is a ______.
