Advertisements
Advertisements
प्रश्न
Give the reason why the following is considered as chemical changes.
Copper carbonate on heat gives copper oxide and carbon dioxide.
Advertisements
उत्तर
Copper carbonate [CuCO3] green colour on heating gives copper oxide [Black colour CuO] and CO2.
Hence composition is changed new substances CuO [Black] and CO2 with new properties are produced and it is irreversible reaction hence it is a chemical change.
\[\ce{\underset{\text{Green}}{CuCO3} ->[\Delta] \underset{\text{Black}}{CuO} + CO2}\]
APPEARS IN
संबंधित प्रश्न
Choose the most appropriate answer.
Rising and setting of the sun at a given place is a
State whether the following is physical or chemical changes.
cutting wood into small pieces —
State whether the following is physical or chemical changes.
photosynthesis —
Give two examples of periodic changes.
Which of the following are physical changes and which are chemical changes?
Burning of candle wax, Melting of candle wax, Mixing of iron filings and sand, Burning of wood, Breaking a piece of chalk, Burning a piece of paper, Cutting a piece of paper.
Classify the Following as a Physical Or a Chemical Change.
Formation of Clouds
Name the following:
The final product of the physical change involved during the ‘melting of a piece of wax’.
Select the chemical changes from the following list of changes
Drying of a fruit
A change in which matter undergoes a change but the total mass of the substance is unaltered is a ______ change.
Assertion: The explosion of fire cracker is a physical change.
Reason: A physical change is a reversible change.
