In 2012, the tap water in Zhenjiang City was contaminated by phenol, causing some supermarkets in Zhenjiang to be sold out of mineral water and purified water, causing great discomfort to people's liv

(1) The physical properties of phenol are: it is a colorless crystal at room temperature with a special smell; the information available based on the chemical properties of phenol is: it is toxic and should be avoided in contact with food; it has strong It is corrosive, so be careful to avoid contact with skin when using it; it will turn red when exposed to the air, indicating that it may react chemically with certain gases in the air;

So the answer is: It is a A colorless crystal; phenol may react chemically with gases in the air; phenol is highly corrosive, so be careful to avoid contact with skin when using it (anything is reasonable);

(2) Put in activated carbon purifier Water adsorbs phenol and does not generate new substances, so the changes that occur are physical changes;

So the answer is: physics;

(3) If you want to detect the water after treatment in the water plant Whether the water is hard water can be tested with soapy water: if there are more bubbles, it is soft water; if there are more scum and less foam, it is hard water;

So the answer is: soapy water;< /p>

(4) Specific methods to prevent water pollution include: industrial wastewater is discharged after meeting the standards, rational use of pesticides and fertilizers, and no use of phosphorus-containing detergents;

So the answer is: Industrial Is the wastewater discharged after reaching the standard after treatment? (Anything reasonable is acceptable)