Question

KO\(_2\) is used in life supports in space crafts, submarines and emergency breathing apparatus since it

• A. absorbs CO\(_2\)
• B. releases O\(_2\)
• C. releases CO\(_2\)
• D. absorbs CO\(_2\) and releases O\(_2\)

Hint:

Superoxides contain O\(_2^-\) ion (paramagnetic).

Answer 1

The Correct Option is D

Step 1: Concept:
Potassium superoxide (KO\(_2\)) reacts with CO\(_2\) and moisture to produce O\(_2\).
Step 2: Explanation:
4KO\(_2\) + 2CO\(_2\) \(\rightarrow\) 2K\(_2\)CO\(_3\) + 3O\(_2\)
4KO\(_2\) + 4CO\(_2\) + 2H\(_2\)O \(\rightarrow\) 4KHCO\(_3\) + 3O\(_2\)
Thus, it absorbs CO\(_2\) and releases O\(_2\).
Step 3: Conclusion:
Thus, KO\(_2\) absorbs CO\(_2\) and releases O\(_2\).