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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
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:
Cutting of trees
Match the columns
| column A | coulmn B |
| 1. A change which cannot be easily reversed | a. man-made change |
| 2.A change that repeats itself at regular intervals | b. chemical change |
| 3. A change that is made by humans | c. physical change |
|
4. A change in which the original substance cannot be obtained |
d. periodic change |
| 5. A change where no new substance is formade | e. irreversible change |
| f. slow change |
State whether the following is physical or chemical changes.
(energy produced) dissolving sugar in water —
What are man-made changes ?
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.
Natural and man-made change.
State whether the following statement is true or false. If false write the correct statement.
Melting of ice is an exothermic, irreversible chemical change.
Compare the energy changes involved during a physical and a chemical change.
Select the chemical changes from the following list of changes
Respiration in mammals.
Digestion of food is a physical change.
When a woolen yarn is knitted to get a sweater, the change can be classified as ____________.
