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Bunuel
In the process of manufacturing drug N, a chromatography column needs to be washed and disinfected using a chemical T after manufacturing each batch. The chemical is then disposed of in the wastewater. To reduce the adverse effect of the chemical T on marine life, a regulation will soon come into effect that will forbid disposal of the chemical T above a certain concentration limit into wastewater. Moreover an additional surcharge will be levied on the price of chemical T to discourage its usage. The management is considering using another replacement chemical L, which is also suitable for washing and disinfecting chromatography columns, to manufacture drug N.

All of the following points may be useful to be considered by the management to decide whether replacing chemical T by chemical L would be financially beneficial EXCEPT:

A. Whether using chemical L instead of chemical T would affect the yield per batch of drug N.
B. Whether the chemical structure of chemical L is similar to that of chemical T.
C. Whether the additional cost for diluting the chemical T below the concentration limit to be stipulated by the regulation is significant.
D. Whether there are any alternative cost effective ways to dispose of chemical T rather than disposing of into wastewater.
E. Whether chemical L would bear additional costs because of similar regulations imposed for chemical T.


Thank you sayantanc2k !

GMAT Club Official Explanation:

A. If the yield of drug N per batch reduces after using chemical L, then it may not be financially beneficial to use chemical L, whereas if the yield increases then it may be financially beneficial to use the chemical L. Therefore, this point may be useful to be considered by the management to determine the financial benefit of using chemical L instead of chemical T.

B. Correct. The similarity or dissimilarity in chemical structures has no bearing on financial considerations, as long as it is known that both would serve the purpose of washing and disinfecting chromatography columns.

C. If the cost of diluting is significant, then it may be beneficial to replace chemical T by chemical L. If the cost is not significant, the replacement may not be financially beneficial. Therefore, this point may be useful to be considered while determining the financial benefits.

D. If there is an alternative cost effective way of disposal of chemical T, then it may not be beneficial to replace chemical T by chemical L. If there is none, the replacement may be financially beneficial. Therefore, this point may be useful to be considered while determining the financial benefits.

E. If chemical L bears additional costs, then it may not be beneficial to replace chemical T by chemical L. If the chemical L does not bear additional costs, the replacement may be financially beneficial.

Answer: B.­
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