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  4. One of the elements present in carnalite shows flame colouration. The colour of the flame is:

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Q. One of the elements present in carnalite shows flame colouration. The colour of the flame is:

EAMCETEAMCET 2004

Solution:

The formula of carnalite is $ \text{KCl}\text{.MgC}{{\text{l}}_{\text{2}}}\text{6}{{\text{H}}_{\text{2}}}\text{O}\text{.} $ In this formula only potassium gives colour (lilac) to flame, whereas magnesium does not give flame colouration.