Question

Alkali metals react vigorously with cold water resulting in the displacement of ___________.
1. hydrogen
2. oxygen
3. carbon dioxide
4. nitrogen

Answer 1

Correct Answer - Option 1 : hydrogen

The correct answer is hydrogen.

 

• Alkali Metals:
  • Alkali metals react vigorously with cold water resulting in the displacement of hydrogen.
  • Hydrogen (H), lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr) are called alkali earth metals.
  • Alkali earth metals are soft, shiny, low-melting, highly reactive metals, which tarnish when exposed to air. 
  • Alkali metals are very reactive, they are found in their elemental form in nature, and are usually found as ionic compounds (except for hydrogen).
  • They have only one valence electron in the highest-energy orbitals (ns1). 
  • They have low melting points.
  • These elements react vigorously with water and produce metal hydroxide, hydrogen gas, and heat.