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प्रश्न
When a woolen yarn is knitted to get a sweater, the change can be classified as ____________.
विकल्प
physical change
chemical change
endothermic change
exothermic change
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उत्तर
When a woolen yarn is knitted to get a sweater, the change can be classified as physical change.
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संबंधित प्रश्न
Fill in the blank
Chemical change occurs as a result of __________ between two substances.
State whether the following is physical or chemical changes.
photosynthesis —
Classify the following as physical or chemical changes :
- Cooking of food
- Boiling of water
- Cutting of trees
- D0issolving salt in water
- Digestion of food
- Melting of ice
Classify the Following as a Physical Or a Chemical Change.
Formation of Clouds
Fill in the blank.
The reaction in which energy is evolved is called
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 correct answer from the choice given below to complete the sentence
The matter is added or removed during a ____________ change.
Name the following.
The product obtained during a physical change when water converts from a liquid into a solid.
When solute is dissolved in a solvent it forms a solution.
State whether the following statement is true or false:
Anaerobic bacteria digest animal waste and produce biogas.
