When a small piece of a Group I metal is put into a large beaker of cold water, a reaction takes place. Four statements about this reaction are given. 1 The metal melts. 2 Hydrogen is produced. 3 Steam is produced. 4 The pH of the solution increases. Which statements about this reaction describe a physical change?
- A1 and 3
- B1 and 4
- C2 and 3
- D2 and 4