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प्रश्न
Assertion: The explosion of fire cracker is a physical change.
Reason: A physical change is a reversible change.
पर्याय
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true
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उत्तर
A is false but R is true
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Boiling of water to form steam.
Write true or false
Melting of ice is a physical 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 blank with the correct word of the statement given below:
Sublimation of iodine is an example of _________ change.
Give a reason why
Change of seasons is a periodic change while the change of weather is a non-periodic change.
State which of the following terms connected with change of state of matter i.e.
(a) Melting
(b) Vaporisation
(c) Condensation
(d) Freezing
pertain to –
- Conversion of a liquid into a vapour or gas.
- Conversion of a liquid into a solid.
- Conversion of a solid into a liquid on heating.
Select the chemical changes from the following list of changes
Preparation of carbon dioxide from calcium carbonate & dilute hydrochloric acid.
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 gaseous product of the chemical change which takes place during respiration in living organisms.
Tearing of sheet of paper into pieces is ______ By the process of Heating of water, change.
