IUPAC name of glycerol

This type of question, asked 3 times: 3 May 2023 S1, 9 May 2024 S2, 19 Apr 2026 S2. All 3 questions below, oldest first.

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Question 1
3 May 2023 S1
92 $What is IUPAC name of propylene glycerol?$
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Question 2
9 May 2024 S2
67 $What is IUPAC name of propylene glycerol?$
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Question 3
19 Apr 2026 S2
18 $IUPAC name of glycerol is -$
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