Oxoacids formed by each halogen (fluorine forms only HOF)

This type of question, asked 3 times: 22 Apr 2025 S2, 25 Apr 2025 S1, 14 May 2026 S1. All 3 questions below, oldest first.

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Question 1
22 Apr 2025 S2
84 $Which of the following halogen forms maximum number of oxoacids?$
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Question 2
25 Apr 2025 S1
60 $Which of the following is existing oxoacid of fluorine?$
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Question 3
14 May 2026 S1
29 $Identify the halogen that forms only one type of oxoacid.$
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