Answer:
It's HYDROXIDE
Explanation:
You do not call it as hydroxide ion because ion always have + or -
I hope this helps
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Tetranol
Since it consist of 4 carbons So the prefix is "Tetra"
=> It has an "OH" group attached to it so the functional group is "ALCOHOL".
For alcohols, the suffix is "-ol" so the name becomes
=> Tetranol
