Question:
An elixir contains 47 % v/v alcohol, what is the proof spirit according to USP:
An elixir contains 47 % v/v alcohol, what is the proof spirit according to USP:
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In USP, proof is calculated as twice the percentage of alcohol by volume. Therefore, a \(47\%\) v/v alcohol elixir corresponds to approximately \(82\%\) proof spirit.
Updated On: Sep 21, 2025
70%
82%
63%
91%
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The Correct Option is B
Solution and Explanation
The proof spirit is twice the percentage of alcohol by volume. Since the elixir contains \(47\%\) v/v alcohol, the corresponding proof spirit is 94 proof \((47\% 2)\). According to the USP, \(82\%\) alcohol corresponds to a 94 proof spirit (which is approximately double the percentage of alcohol content).
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