1.

Potassium superoxide finds use in breathing equipment and safeguards the use to breathe in oxygen generated internally in the apparatus without being exposed to toxic fumes outside. The supply of oxygen is due to(i) show decomposition of KO_(2)(ii) reaction of superoxide with moisture in the exhaled air (iii) reaction of KO_(2) with CO_(2) in the exhaled air.

Answer»

(i), (ii) and (iii) are correct
(ii) and (iii) are correct
(i) and (ii) are correct
(iii) is only correct

Solution :The moisture of the breath reacts with superoxide to liberate oxygen, andat the same TIME the potassium HYDROXIDE formed removes `CO_(2)` as it is EXHALED there by allowing the atmosphere in the equipment to be CONTINUOUSLY regenerated
`4KO_(2)(s) + 2H_(2)O(g) rarr4KOH(aq) + 3O_(2)(g)`
`2KO_(2)+2H_(2)Orarr2KOH+H_(2)O_(2)+O_(2)``KO_(2)` also continuously combines DIRECTLY with `CO_(2)` forming `K_(2)CO_(3)` and with `CO_(2)` and moisture together forming `KHCO_(3)`
`4KO_(2)+2CO_(2)rarr2K_(2)CO_(3)+3O_(2)`
`4KO_(2)+4CO_(2)+2H_(2)Orarr4KHCO_(3)+3O_(2)`


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