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Sulphate salt gives metal oxide and SO(3...

Sulphate salt gives metal oxide and `SO_(3)(or SO_(2)+(1)/(2)O_(2))` on heating:

A

`K_(2)SO_(4)`

B

`CaSO_(4)`

C

`MgSO_(4)`

D

`(NH_(4))_(2)SO_(4)`

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To solve the question regarding which sulphate salts give metal oxide and SO3 (or SO2 + 1/2 O2) upon heating, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Sulphate Salts**: We need to consider the sulphate salts mentioned in the problem. The common sulphate salts include: - K2SO4 (Potassium Sulphate) - NH4SO4 (Ammonium Sulphate) - CaSO4 (Calcium Sulphate) - MgSO4 (Magnesium Sulphate) 2. **Assess Thermal Stability**: - Potassium Sulphate (K2SO4) and Ammonium Sulphate (NH4SO4) are known to be thermally stable. This means they do not decompose upon heating to produce metal oxides and SO3. - In contrast, Calcium Sulphate (CaSO4) and Magnesium Sulphate (MgSO4) are alkaline earth metal sulphates that can decompose upon heating. 3. **Determine the Products of Heating**: - When **MgSO4** is heated, it decomposes to form: \[ \text{MgSO}_4 \rightarrow \text{MgO} + \text{SO}_3 \] - When **CaSO4** is heated, it decomposes to form: \[ \text{CaSO}_4 \rightarrow \text{CaO} + \text{SO}_3 \] 4. **Conclusion**: Based on the thermal decomposition reactions, we conclude that: - Magnesium Sulphate (MgSO4) gives Magnesium Oxide (MgO) and SO3. - Calcium Sulphate (CaSO4) gives Calcium Oxide (CaO) and SO3. Thus, the sulphate salts that give metal oxide and SO3 upon heating are **Calcium Sulphate (CaSO4)** and **Magnesium Sulphate (MgSO4)**. ### Final Answer: The sulphate salts that give metal oxide and SO3 on heating are **Calcium Sulphate (CaSO4)** and **Magnesium Sulphate (MgSO4)**. ---
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Sulphate salt metal oxide and SO_(3)(or SO_(2)+(1)/(2)O_(2)) on heating:

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