Question

write your observation when the following are heated i) limestone ii) potassium chloride iii) ferrus sulphate iv) lead nitrate​

Answer 1

Explanation:

1. If limestone is heated strongly, it breaks down to form calcium oxide and carbon dioxide. Calcium oxide is also called quicklime.
2. When potassium chlorate (KClO3) is heated in the presence of manganese dioxide catalyst, it decomposes to form potassium chloride and oxygen gas
3. On heating, ferrous sulphate crystals lose water and anhydrous ferrous sulphate (FeSO4) is formed. ... On further heating, anhydrous ferrous sulphate decomposes to form ferric oxide (Fe2O3), sulphur dioxide (SO2) and sulphur trioxide (SO3). So, the gas emitted smells like burning sulphur.

    4.   When the lead nitrate is heated up then the lead nitrate      decomposes the heat, and the nitrogen oxide appears to be the brown fumes, and then the oxygen is produced, but when the leas nitrate is heated up then it decomposes to lead nitrogen oxide, lead mono oxide and the oxygen.

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