Advertisements
Advertisements
Question
Tick (√) the correct alternative from the choice given for the following statement.
The compound rust is a hydrated oxide of
Options
copper
aluminium
iron
gold
Advertisements
Solution
iron
APPEARS IN
RELATED QUESTIONS
Choose the most appropriate answer.
Rising and setting of the sun at a given place is a
Tick the most appropriate answer.
5. Photosynthesis requires
- heat energy.
- wind energy
- sunlight.
- sound energy
State whether the following is physical or chemical changes.
mixing oil with water —
Classify the Following as a Physical Or a Chemical Change.
Formation of Clouds
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.
Copper carbonate on heat gives copper oxide and carbon dioxide.
Name the following.
The salt obtained when a chemical change takes place on the addition of iron to dilute sulphuric acid.
Stretching gold coin into a ring is a ______ change.
Wood to sawdust:______:: Wood to Ash: Chemical change
A physical change is generally____________.
