Oxide (peroxide or superoxide) formed by an alkali metal with oxygen

This type of question, asked 3 times: 21 Apr 2025 S2, 23 Apr 2025 S1, 19 Apr 2026 S1. All 3 questions below, oldest first.

Try each one first, then open its answer.

Question 1
21 Apr 2025 S2
91 $Which from following elements form superoxide with air?$
Tap an option to check your answer.
Question 2
23 Apr 2025 S1
69 $Identify the element forming peroxide on reaction with oxygen.$
Tap an option to check your answer.
Question 3
19 Apr 2026 S1
14 $Which element from following forms superoxide with oxygen?$
Tap an option to check your answer.