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प्रश्न
Distinguish by heating the following in dry test tubs.
Zinc nitrate and copper nitrate.
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उत्तर
| Zinc nitrate | Copper nitrate | |
| Residue left | Zinc oxide(ZnO) | Copper oxide(CuO) |
| Colour of residue | Yellow when hot and White when cold | Black Solid |
| Gas produced | The gas produced is Nitrogen dioxide and oxygen(NO2 + O2) | The gas produced is Nitrogen dioxide and oxygen(NO2 + O2) |
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संबंधित प्रश्न
Define precipitation reaction.
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Define an electrochemical reaction.
Name: A brown gas
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- Colour change
- Effervescence or gas evolved
- Evolution or absorption of heat
- Formation of a precipitate.
With reference to each of the above indications, state the external indication seen during – Thermal decomposition of mercury [II] oxide.
Complete the table given below.
| Heat on Zinc nitrate | Colour of residue |
State the following reaction represent oxidation or reduction.
\[\ce{Al->Al+++}\]
Higher order Thinking question
A very hot glass on putting in cold water cracks. What does this change indicate?
What are the chemical reactions that occur in everyday life?
Define the following term:
Chemical change
