Alkali metals react with various non-metals. However, Lithium () exhibits a unique limitation regard — s Block Elements Chemistry Question
Question
Alkali metals react with various non-metals. However, Lithium ($Li$) exhibits a unique limitation regarding its reaction with ethyne (acetylene) compared to Sodium ($Na$) and Potassium ($K$). What is this limitation?
Answer: C
💡 Solution & Explanation
Unlike Sodium and Potassium, which react readily with ethyne gas to form ionic ethynides (acetylides) like $Na_2C_2$ and liberate hydrogen gas, Lithium anomalously does NOT form salts with ethyne due to its high covalent tendency and polarizing power.
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