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प्रश्न
Distinguish by heating the following in dry test tubs.
Zinc carbonate, Copper carbonate and lead carbonate.
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उत्तर
| Zinc carbonate | Copper carbonate | Lead carbonate | |
| Residue left | Zinc oxide(ZnO) | Copper oxide(CuO) | Lead Oxide (PbO) |
| Colour of residue | Yellow when hot and white when cold | Colour is Black solid. | Colour is yellow. |
| Gas produced | Carbon dioxide gas is produced. | Carbon dioxide gas is produced. | Carbon dioxide gas is produced. |
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संबंधित प्रश्न
Changes in which new substances are formed are called ______ changes.
Fill in the blank
A new substance is always formed in a _______ change.
True or false
New substances are formed in a chemical change.
Explain the following reaction with one suitable example of Displacement reaction.
Explain the following reaction with one suitable example of Double decomposition reaction.
Name: Two carbonates do not produce carbon dioxide on heating.
Select the correct answer for the following options:
The pale blue precipitated obtained when copper [II] sulphate reacts with sodium hydroxide.
Give balanced equation for the following conversion affected by heat alone on the substance:
Zinc nitrate to nitrogen dioxide
A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.
Are these changes chemical in nature?
______ occurs in the absence of air and in the presence of micro-organisms such as yeast.
