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प्रश्न
Fill in the blank with the appropriate word of the statement given below:
If a change is permanent and irreversible it is considered a _________ change.
उत्तर
If a change is permanent and irreversible it is considered a chemical change.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Burning of paper and wood
Define physical change. Give two examples for the above changes.
Tick (√) the correct alternative from the choice given for the following statement.
A substance which can not sublime is
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.
Change is the law of nature and occurs in our everyday life, at all times and in all places.
Differentiate between the following change with a suitable example.
Slow and fast change.
State why addition of sodium chloride to water is considered a physical change, while addition of dilute sulphuric acid to zinc is considered 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.
Select the chemical changes from the following list of changes
The occurrence of lightning.
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.
Iron pipes coated with zinc do not get rusted easily.
