Question

Which one of the following species is the hard acid
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Answer 1

❤Hey!!!

Your question is incomplete....

Answer 2

Explanation:

Your question is incomplete

but maybe this is the answer :-

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Weakest acid has the strongest conjugate base. Since, R OH is the weakest acid, therefore RO− is the strongest base.

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carborane acid

The world's strongest acid, at least a million times more potent than concentrated sulphuric acid, has been made in a lab in California. Perhaps confusingly, it is also one of the least corrosive. The compound, called a carborane acid, is the first 'superacid' that can be stored in a bottle, say its creators

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Hope it helps you !