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प्रश्न
Write true or false
A natural change can also be a desirable change.
पर्याय
True
False
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उत्तर
True
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संबंधित प्रश्न
State whether the following is physical or chemical changes.
cutting wood into small pieces —
Classify the following as physical or chemical changes :
Breaking of a glass tumbler
Separate the following into physical and chemical changes :
Sublimation of a solid, Decomposition of water into hydrogen and oxygen by passing electric current, Formation of clouds, Making a fruit salad from raw fruits, Dissolving carbon dioxide in water
Which of the following are physical changes and which are chemical changes ?
Ammonium chloride is also a sublimable solid. Give a reason why the sublimation of ammonium chloride involves a physical and a chemical change.
Name the following:
The term involved in the change of state from – ‘water to ice’ – which is a physical change.
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. |
Gas exists in three states as solid, liquid, and gas.
Ice, water and water vapour look different and display different ______ properties but they are ______ the same.
Iron pipes coated with zinc do not get rusted easily.
