JEE PYQ: S Block Elements Question 37
Question 37 - 2019 (12 Jan Shift 2)
A metal on combustion in excess of air forms X. X upon hydrolysis with water yields $\text{H}_2\text{O}_2$ and $\text{O}_2$ along with another product. The metal is:
(a) Na (b) Rb (c) Mg (d) Li
Show Answer
Answer: (b)
Solution
$\text{Rb} \xrightarrow{\text{O}_2 \text{(excess)}} \text{RbO}_2$ (superoxide, X). $2\text{RbO}_2 + 2\text{H}_2\text{O} \rightarrow 2\text{RbOH} + \text{H}_2\text{O}_2 + \text{O}_2$. The metal is Rb.
BETA
