The actual yield of a reaction is usually less than the theoretical yield for all of the following reasons EXCEPT

A. some product is lost during filtration and transfer
B. side reactions produce unwanted products
C. the balanced equation was written incorrectly
D. the reaction is reversible and does not go to completion

Explanation

Physical losses, competing side reactions and reversibility are all genuine reasons why a real yield falls short. A wrongly balanced equation is not a reason for a low yield at all; it simply makes the calculated theoretical yield wrong, so the comparison itself becomes meaningless. Recognising which factors are chemical and which are arithmetic is the point of the question.

The actual yield of a reaction is usually less than the theoretical yield for all of the following reasons EXCEPT

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