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प्रश्न
Wood to sawdust:______:: Wood to Ash: Chemical change
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उत्तर
Wood to sawdust: Physical change. :: Wood to Ash: Chemical change
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संबंधित प्रश्न
What role does energy play in initiating a chemical change ?
State whether the following is physical or chemical changes.
glowing of a bulb -
Tick (√) the correct alternative from the choice given for the following statement
Which one of the following is volatile in nature ?
Photosynthesis cannot take place at night.
Which of the following are physical changes and which are chemical changes ?
Freezing of water
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.
Give the reason why the following is considered as chemical changes.
A piece of magnesium strip is dropped into a beaker containing dilute hydrochloric acid.
Physical Change: Boiling::Chemical Change: ______.
Which of the following is a physical change?
State whether the following statement is true or false:
Anaerobic bacteria digest animal waste and produce biogas.
