Question

100 proof ethanol means it is:

• A. \( \text{100%} \)
• B. \( \text{75%} \)
• C. \( \text{60%} \)
• D. \( \text{50%} \)

Hint:

Alcohol proof is a legacy measurement system used to indicate ethanol concentration in beverages.

Answer 1

The Correct Option is D

Alcohol proof is measured as twice the ethanol percentage in solution. Thus, 100-proof ethanol corresponds to 50% alcohol by volume (ABV). The proof system originated for alcohol purity assessment in historical distillation.