sblock Elements 1 Question 20
20. Both lithium and magnesium display several similar properties due to the diagonal relationship; however, the one which is incorrect is
(2017 Main)
(a) Both form basic carbonates
(b) Both form soluble bicarbonates
(c) Both form nitrides
(d) nitrates of both Li and Mg yield $\mathrm{NO}_2$ and $\mathrm{O}_2$ on heating
Show Answer
Answer:
Correct Answer: 20. (a)
Solution: $\mathbf{M g}$ can form basic carbonate while $\mathbf{L i}$ cannot. $$ \begin{aligned} 5 \mathrm{Mg}^{2+}+6 \mathrm{CO}_3^{2-}+7 \mathrm{H}_2 \mathrm{O} \longrightarrow 4 \mathrm{MgCO}_3 \cdot \mathrm{Mg}(\mathrm{OH})_2 \\ \cdot 5 \mathrm{H}_2 \mathrm{O}+2 \mathrm{HCO}_3^{-} \end{aligned} $$
BETA
