Discussion
Citrus peel at \( 3.2 \) per cent pectin on a dry basis is processed from \( 2000 \) kg of dry peel. The pectin available is
Answer: D
Correct answer: 64 kg
Apply the percentage to the dry peel:
\[ 2000 \times 0.032 = 64\ \mathrm{kg} \]
Pectin is present at only a few per cent, but it is worth a great deal per kilogram as a gelling agent, which is what makes the extraction viable. The dry basis matters: fresh citrus peel is around 80 per cent water, so 2000 kg of dry peel represents something like ten tonnes of wet peel arriving at the plant.
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