Advertisements
Advertisements
प्रश्न
Give two examples for the following case:
Physical changes which are not reversible
Advertisements
उत्तर
- Cutting of paper
- Breaking of glass
APPEARS IN
संबंधित प्रश्न
Classify the following as physical or chemical changes :
- Cooking of food
- Boiling of water
- Cutting of trees
- D0issolving salt in water
- Digestion of food
- Melting of ice
Ammonium chloride is also a sublimable solid. Give a reason why the sublimation of ammonium chloride involves a physical and a chemical change.
Fill in the blanks with the appropriate words of the statement given below:
Heating a piece of iron is considered a __________ change while heating a piece of coal [carbon] is considered a ___________ change.
Fill in the blank with the correct word of the statement given below:
Sublimation of iodine is an example of _________ change.
Change is the law of nature which occurs in everyday life.
State when a substance [i.e. matter] undergoes a kind of change.
Select the chemical changes from the following list of changes
Breaking of glass
Select the correct answer from the choice given below to complete the sentence
The energy required for completion of a physical change is ______________ when the change is reversed.
Name the following.
The salt obtained when a chemical change takes place on the addition of iron to dilute sulphuric acid.
When a woolen yarn is knitted to get a sweater, the change can be classified as ____________.
State whether the following statement is true or false:
Anaerobic bacteria digest animal waste and produce biogas.
