Why rain water is soft but river water is hard ?
Because rain water is free from chemical impufities and river water contains carbonates and chlorides of magnesium and calcium.
Because rain water contains carbonates and chlorides of magnesium and calcium while the river water is freeftom all chemical impurities.
Because rain water contains carbonates of magnesium while the river water contains chlorides of calcium.
Because rain water contains chlorides of magnesium while the river water contains sulphates of calcium.
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