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प्रश्न
Higher order Thinking question
Boiling of water is a physical change; but boiling of egg is a chemical change. Why?
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उत्तर
- Boiling of water is a physical change:
On boiling, water is converted into steam. If we cover the beaker with a lid, steam condenses back to water. So, boiling, of water is a physical change since only the physical state of water changes.
- Boiling of egg is chemical change:
When egg is boiled, chemical nature of the egg changes. The properties of a boiled egg are totally different from the raw egg. Hence, boiling of an egg is a chemical change.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Boiling of water to form steam.
Which of the following are chemical changes?
- Growth of a plant
- Rusting of iron
- Mixing of iron fillings and sand
- Cooking of food
- Digestion of food
- Freezing of water
- Burning of candle
Choose the most appropriate answer.
Rising and setting of the sun at a given place is a
Chemical changes are accompanied by changes in energy.
Classify the following changes as physical or chemical: curdling of milk
Classify the following changes as physical or chemical:- photosynthesis in plants
State whether the following is physical or chemical changes.
shaping a piece of glass —
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.
When ice melts to form water, change occurs in its
When a woolen yarn is knitted to get a sweater, the change can be classified as ____________.
