Traditional Culture Encyclopedia - Photography and portraiture - Among the following water-related changes, there is no chemical change.

Among the following water-related changes, there is no chemical change.

20 12 March 22nd is the 20th World Water Day, and March 22nd-28th is the 25th China Water Week. The United Nations has set the theme of this year's World Water Day as "water and food security". Among the following water-related changes, there is no chemical change: a. sea water dry salt.

A. salt drying in seawater B. chemical changes of hydrogen production by solar photolysis C. chemical changes of drinking water production D. chemical changes of soapy water to distinguish hard water from soft water