Name two metals which react violently with cold water. Write any three observations you would make when such a metal is dropped into water. How would you identify the gas evolved, if any, during the reaction?

Sodium (Na) and potassium (K) are the two metals that react violently with cold water.

Three observations when these metals are dropped into water are given below:
  1. The reaction is exothermic and a huge amount of heat is produced.
  2. Hydrogen gas is evolved.
  3. A small explosion with a pop sound is observed.
The gas that evolved during the experiment is hydrogen gas can be identified by a pop sound.
 

Updated on: 10-Oct-2022

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