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CR - Pyrrole Molecules

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CR - Pyrrole Molecules [#permalink] New post 08 Jan 2004, 22:15
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

0% (00:00) correct 100% (02:52) wrong based on 1 sessions
Folks this problem text has some grammatical mistakes. I dont want to correct it to confuse you.

12. 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 had 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 pyrrole in which the zeolite was submerged formed polypyrrole chains.

(D) None of the pyrrole in which the zeolite was submerged attached itself to the zeolite.

(E) Little, if any, of the pyrrole in which the zeolite was submerged reached the zeolite?s inner channels.

Last edited by anandnk on 09 Jan 2004, 06:11, edited 1 time in total.
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 [#permalink] New post 09 Jan 2004, 14:36
i say C

For the zeolite to turn black, polypyrroles either form lumps or chains.
The zeolite turned black, but no polypyrroles lumps so it must be chains

What's the offical answer?
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 [#permalink] New post 09 Jan 2004, 15:21
Hi sandeep
I didnt expect you to screwup on this one after all the toughies you have answered. Like they say every dog has its day. May be the beer was too mcuh to handle I guess.

Answer is indeed C.

It is frustrating that stolyar, stoolfi, titliest, geethu, dj etc gave up on me.
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 [#permalink] New post 09 Jan 2004, 18:09
anandnk wrote:
Hi sandeep
I didnt expect you to screwup on this one after all the toughies you have answered. Like they say every dog has its day. May be the beer was too mcuh to handle I guess.

Answer is indeed C.

It is frustrating that stolyar, stoolfi, titliest, geethu, dj etc gave up on me.


I guess I got lost in the zeolites... :eyes

I have to be more attentive :arh
  [#permalink] 09 Jan 2004, 18:09
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CR - Pyrrole Molecules

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