JEE Main201912 Jan 2019Morning ShiftChemistrys Block ElementsActual
A metal on combustion in excess air forms X . X upon hydrolysis with water yields H 2 O 2 and O 2 along with another product. The metal is:
Options
- AN a
- BM g
- CL i
- DR b
Correct answer
D. R b
Step-by-step solution
K , R b and C s form super oxides on reaction with excess air R b + O 2 → R b O 2 (excess) 2 R b O 2 + 2 H 2 O → 2 R b O H + H 2 O 2 + O 2 ↑