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प्रश्न
Select the correct answer from the choice given below to complete the sentence
The dissolution of lead nitrate in water is deemed as a _________ change.
विकल्प
physical
chemical
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उत्तर
The dissolution of lead nitrate in water is deemed as a physical change.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Boiling of water to form steam.
Fill in the blank
change in which the substance can be brought back to its original state is called a ............... change.
State four differences between physical and chemical changes.
Tick (√) the correct alternative from the choice given for the following statement.
An example of both physical and chemical change is
True or false
Change of seasons is a non-periodic change.
State which of the following pertain to – chemical changes.
- Substance retains its identity.
- The change is permanent.
- No new substance is formed.
- Is easily reversible.
- Produces one or more new substances by a change in its composition.
- The change is temporary.
- The composition and properties of the original substance are not altered.
Give a reason why – Addition of zinc nitrate to water is a physical change but, the addition of zinc to dilute nitric acid is a chemical change.
Select the chemical changes from the following list of changes
The crystallisation of salt from its solution.
State which of the following 1 to 5 pertain to – A: Physical Change B: Chemical change :
- Sublimation.
- Fermentation.
- Liquefaction or condensation.
- Magnetization.
- Respiration.
Assertion: The explosion of fire cracker is a physical change.
Reason: A physical change is a reversible change.
