pretest 15 2/12

lily88888UID: 2828533

Individual pyrrole molecules readily join together into larger molecules called polypyrroles. If polypyrroles form from pyrrole in the presence of zeolites, they do so by attaching to the zeolite either in lumps on the outer surface of the zeolite or in delicate chains within the zeolite's inner channels. When zeolite changes color from yellow to black, it means that on or in that zeolite polypyrroles have formed from pyrrole. Yellow zeolite free of any pyrrole was submerged in dissolved pyrrole. The zeolite turned black even though no polypyrroles formed on its outer surface.

If the statements above are true, which one of the following must on the basis of them be true?
A.Polypyrroles has already formed on or in the zeolite before it was submerged.
B. Lumps of polypyrrole attached to the zeolite were responsible for its color change.
C. At least some of the pyrrrole in which zeolite was submerged form polypyrrole chains.
D. None of the pyrrole in which the zeolite was submerged formed polypyrrole chains.
E. Little, if any, of the pyrrole in which the zeolite was submerged reached the zeolite's inner channels.
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我现在知道我为什么选不出来。语法的问题。最后俩句话是说，把黄色的没有pyrrole的
zeolite放到溶解的pyrrole下面。即使zeolite的外表面没有形成polypyrroles，zeolite变
成了黑色。但这两句话之间用的是句号。我把这两句话当成两个完全不相干的现象
理解。

duijinxiaoziUID: 2585955

zeolite polypyrroles =polypyrroles
这个是比较容易，让人以为是 2 种物质。