Name two alkalies that can displace hydrogen. Give balanced equations for the same. Why are the metals you have used considered to have unique nature.
Two alkali metals which can displace hydrogen are: sodium and potassium
2Na + 2H2O → 2NaOH + H2
2K + 2H2O → 2KOH + H2
Alkali metals are also known to react violently and explosively with water. This is because enough heat is given off during the exothermic reaction to ignite the H2(g).