Which type of metal can action on cold water to evolve hydrogen gas ? Share with your friends Share 0 Raveena Sharma answered this 1. There are two metals which react in cold water to give hydrogen gas. 2. They are Sodium and Potassium. 0 View Full Answer Pratiksha Pradhan answered this All the alkali metals react vigorously with cold water. In each reaction, hydrogen gas is given off and the metal hydroxide is produced. The speed and violence of the reaction increases as you go down the group. 0