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प्रश्न
Give the reason why the following is considered as chemical changes.
An iron nail kept open in the atmosphere rusts.
उत्तर
Rust of iron is a chemical change as iron rust [Fe2O3χ H20] is a brown flaky powder having a different composition from original iron metal, which is an irreversible change.
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संबंधित प्रश्न
Write short answer.
Name two reversible changes.
State whether the following is physical or chemical changes.
burning of sugar —
State whether the following is physical or chemical changes.
heating a mixture of iron filings and sulphur—
Tick the most appropriate answer.
Photosynthesis requires
Write true or false
Burning of paper and formation of curd are reversible changes.
State the Differences Between a Physical Change and a Chemical Change.
Make a list of different types of changes with example.
Select the chemical changes from the following list of changes
Drying of a fruit
Select the chemical changes from the following list of changes
The crystallisation of salt from its solution.
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. |
