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प्रश्न
Select the chemical changes from the following list of changes
Butter turning rancid
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उत्तर
Butter turning rancid is a CHEMICAL change as composition changes, a new substance with new properties is formed, irreversible and permanent change.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Burning of paper and wood
Classify the changes involved in the following process as physical or chemical changes:
Photosynthesis
Choose the most appropriate answer.
Rising and setting of the sun at a given place is a
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 |
Write true or false for the statement.
Burning of paper and formation of curd are reversible changes
Give reasons why – separation of mixtures e.g. iron from a mixture of iron and sulphur is a physical change, but heating a mixture of iron and sulphur is considered a chemical change.
Select the chemical changes from the following list of changes
Boiling of milk.
When ice melts to form water, change occurs in its
Higher order Thinking question
Boiling of water is a physical change; but boiling of egg is a chemical change. Why?
When solute is dissolved in a solvent it forms a solution.
