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Question

KO2 finds use in breathing equipment to safeguard the user to breathe in oxygen generated internally in the apparatus without being exposed to toxic fumes outside. The supply of oxygen is due to :

i.Slow decomposition of KO2

ii.reaction of superoxide with moisture in the exhaled air

iii.reaction of KO2 with CO2 in the exhaled air



Your Answer
A

only iii is correct

Correct Answer
B
ii and iii are correct 
Your Answer
C

both i and iii are correct

Your Answer
D

i ii and iii are all correct


Solution

The correct option is B ii and iii are correct 

Let us look at the properties of KO2:

2KO2+2H2O2KOH+H2O2+O2

2KO2+CO K2CO3+O2

4KO2+2CO2 2K2CO3+3O2

Clearly the answer is b) both ii and iii are correct

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