Please note that we may have come up with some pretty strange combinations, but this is solely for the purpose of this practical exercise.

13.1 A factory thatsells mercury, would like to install a pipeline, to channel the mercury from one part of the plant to another. Please list three materials, which should absolutely not be considered, as far as the selection of this pipeline is concerned. (3)

13.2 416 & 440C as well as titanium would, most certainly, not be considered for use with hydrogen. Name another metal group, which may exhibit a minor to moderate effect with hydrogen, and which could be used, if you were to proceed with caution. (1)

13.3 Name metals which will not prove suitable, when used with milk. (2)

13.4 Name the only two choices, which stand out clearly as being normally suitable, for use with aerated hydrochloric acid. (2)

13.5 Looking at this table, would you approach any of the metal groups differently, should your hydrochloric acid be air free. (1)

13.6 Can the same be said about air-free or aerated hydrofluoric acid