Advertisements
Advertisements
प्रश्न
Physical Change: Boiling::Chemical Change: ______.
Advertisements
उत्तर
Physical Change: Boiling::Chemical Change: Burning
APPEARS IN
संबंधित प्रश्न
Tick the most appropriate answer.
Physical changes are
Classify the following as physical or chemical change :
Formation of curd from milk
Classify the following as physical or chemical change :
Condensation of steam
Classify the following as a physical or a chemical change.
Boiling of water
Fill in the blank.
The reaction in which energy is evolved is called
Fill in the blank with the appropriate word of the statement given below:
Germination of seeds is considered a __________ change.
Give four reasons why the burning of a magnesium ribbon in the air is considered a chemical change.
Potassium chloride is added to water and stirred. A salt solution is obtained, which is then boiled, leaving behind a residue.
- Is the above change physical or chemical?
- Name the residue which remains behind after the salt solution is boiled.
- Is the change reversible or not reversible?
- Are the composition and properties of the original substance altered?
- Give a reason why the above experimentation would not be possible if calcium carbonate was taken in place of potassium chloride.
Name the following.
The gaseous product of the chemical change which takes place during respiration in living organisms.
Classify the following as physical or chemical properties
The composition of a sample of steel is 98% iron, 1.5% carbon and 0.5% other elements.
