JEE Main 12 Jan 2019 Morning Question 3
Question: A metal on combustion in excess air forms X. X upon hydrolysis with water yields $ H _2O _2 $ and $ O _2 $ along with another product. The metal is [JEE Main Online Paper Held On 12-Jan-2019 Morning]
Options:
A) Li
B) Rb
C) Mg
D) Na
Show Answer
Answer:
Correct Answer: B
Solution:
K, Rb and Cs form super oxides on reaction with excess air.
$ Rb+O _2\to RbO _2 $ $ 2RbO _2+2H _2O\to 2RbOH+H _2O _2+O _2\uparrow $
