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How will you distinguish between: 1. Magnesium and calcium?  2. Sodium sulphate and barium sulphate?  3. Lithium nitrate and potassium nitrate?

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How will you distinguish between:

1. Magnesium and calcium? 

2. Sodium sulphate and barium sulphate? 

3. Lithium nitrate and potassium nitrate?

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1 Answer

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  • Calcium when heated imparts brick red colour to flame but magnesium does not. 
  • Sodium sulphate is soluble in water but barium. sulphate is insoluble. 
  • Lithium nitrate on heating gives reddish brown vapours of NO2 but potassium nitrate gives colourless oxygen gas.
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