wiz-icon
MyQuestionIcon
MyQuestionIcon
2
You visited us 2 times! Enjoying our articles? Unlock Full Access!
Question

HCl is added to the following oxides, which one would give H2O2?

A
BaO2
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
MnO2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
PbO2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
NO2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A BaO2
The laboratory preparation of hydrogen peroxide was based on the technique that Thenard used.

In this technique, barium nitrate, purified by recrystallization, was decomposed by heating in air in a porcelain retort. The resulting oxide was further oxidized by heating in a stream of oxygen to a dull red heat.

The barium peroxide which formed was then dampened, ground, and dissolved in hydrochloric acid.

A slight excess of sulfuric acid was then added to precipitate barium sulfate and regenerate hydrochloric acid. The procedure of barium peroxide solution and sulfate precipitation was repeated several times in the same solution to increase the peroxide concentration.
Reaction:

BaO2.8H2O+H2SO4BaSO4+H2O2+8H2O.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Hydrogen Peroxide
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon