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प्रश्न
What kind of change is shown by tearing of paper?
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उत्तर
Tearing of paper is a physical change that cannot be reversed.
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संबंधित प्रश्न
Fill in the blank.
Changes that occur in nature are called ........................
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
A natural change can also be a desirable change
State three differences between evaporation and boiling
Tick (√) the correct alternative from the choice given for the following statement
Which one of the following is volatile in nature ?
State one instance where water undergoes a physical change and one in which it undergoes a chemical change.
Select the chemical changes from the following list of changes
Boiling of milk.
In a solution of salt in water, water is the solute
Classify the following changes as physical and chemical changes
A rough piece of wood is sanded and polished resulting in change in texture, Rusting of a iron nail, Painting the grill, Bending a paper clip, Pounding silver into thin plate, Rolling the chappathi dough into thin wire, Occurrence of day and night, eruption of volcano, burning of matchstick, dosa from the batter, blinking of eyelids, occurrence of a thunderstorm, rotation of the earth, formation of eclipses.
| Sr. No. | Physical changes | Chemical changes |
| 1. | ||
| 2. |
Give two examples for the following case:
Physical changes which are reversible
