Metal sulphides occur mainly in rocks and metal halides in lakes and seas because :

metal sulphides are soluble in water while metal chlorides are insoluble in water

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metal sulphides are insoluble in water while metal chlorides are soluble in water

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metal sulphide and metal chlorides both are soluble

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metal sulphides and metal chlorides both are insoluble

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Solution

The correct option is B metal sulphides are insoluble in water while metal chlorides are soluble in water
Metal halides being soluble in the water get dissolved in rainwater and are carried to lakes and seas during weathering of rocks.

On the other hand, metal sulphides being insoluble are left behind in the rock as residue.

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