First slide
Anomalous behaviour of Lithium, Diagonal Relationship with Mg
Question

Statement-I: Lithium cannot react with Ethyne
Statement-II: Lithium cannot react with Nitrogen

Moderate
Solution

Alkali metals are active metals. They react with active H-compounds like H2O , RCOOH, HCl, ROH and HCCH. Lithium cannot react with Ethyne to form ethynide .Lithium can react directly with carbon .

 No alkali metals except lithium can directly combine with N2­. 

 6Li +N2 2Li3 N

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