JEE PYQ: S Block Elements Question 15
Question 15 - 2020 (02 Sep Shift 2)
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:
(a) Na and Rb (b) Na and Ca (c) Cs and Ba (d) Li and Mg
Show Answer
Answer: (d)
Solution
Li and Mg do not form solid bicarbonate, but react with $\text{N}_2$ to give nitrides. $6\text{Li} + \text{N}_2 \xrightarrow{\Delta} 2\text{Li}_3\text{N}$ and $3\text{Mg} + \text{N}_2 \xrightarrow{\Delta} \text{Mg}_3\text{N}_2$. This is due to the diagonal relationship between Li and Mg.
BETA
