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Dear student
Rain water is a type of soft water which is devoid of impurities and dissolved ions,
Similarly ,distilled water is also devoid of mineral ions.
Hence both of these form maximum foam with soap.
Thus the correct option is A
Regards
Rain water is a type of soft water which is devoid of impurities and dissolved ions,
Similarly ,distilled water is also devoid of mineral ions.
Hence both of these form maximum foam with soap.
Thus the correct option is A
Regards