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Which combination of gases is suitable for fruit ripening?

1. 80% CO2 and 20% CH2
2. 80% CH4 and 20% CO2
3. 80% CO2 and 20% O2
4. 80% C2H4 and 20% CO2

Correct answer: 80% C2H4 and 20% CO2

Solution

Fruit ripening is promoted by ethylene (C2H4), a natural plant hormone used commercially to accelerate ripening. The other gases listed are not the standard ripening mixture, while carbon dioxide can be included in controlled atmospheres alongside ethylene.

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