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

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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. 

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