Two elements A and B have similar chemical properties.


Two elements $A$ and $B$ have similar chemical properties. They don't form solid hydrogencarbonates, but react with nitrogen to form nitrides. A and B, respectively, are :

  1. $\mathrm{Na}$ and $\mathrm{C}$

  2. Li and Mg

  3. $\mathrm{Cs}$ and $\mathrm{Ba}$

  4. $\mathrm{Na}$ and $\mathrm{Rb}$

Correct Option: , 2


Both $\mathrm{Li}$ and $\mathrm{Mg}$ form nitride when reacts directly with nitrogen.

The hydrogen carbonate of both $\mathrm{Li}$ and $\mathrm{Mg}$ does not exist in solid state.

All alkali metal hydrogen carbonate exist in solid state except $\mathrm{LiHCO}_{3}$.

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