Answer:
i am quite unsure what you want me to answer but if you explain it to me w ould live to help
Explanation:

The reaction creates dihydrogen, hence if it's uncontrolled it could lead to potentially dangerous amounts of gas being released at once.
Answer:
a. Change of state
Explanation:
Because you will see that the state has changed
The particles in a solid are tightly packed and locked in place. Although we cannot see it or feel it, the particles are vibrating in place.
As these molecules heat up, they will vibrate more vigorously, and will eventually turn to water, then gas.