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chem paper 1 doubt

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zbzbzb25:
ASALAMOALAIKUM WARAHMATULLAHI WABARAKATUHU WAMAGHFIRATUHU
n hi!

which apparatus is most suitable for producing ethanol by fermentation?

A- a conical flask with cotton wool at its mouth containing sugar sol and yeast,not being heated
B-a conical flask with a bung containing sugar sol and yeast,being heated
C-a conical flask with sugar sol and yeast, being heated and no cotton wool or bung with steam escaping
D- a conical flask placed in a tray of ice,the conical flask contains sugar sol and yeast (no bung or cottonwool)

this is qn no. 40 from 0620 november 1999

mark scheme says (A)
but i thnk it shud be (B)

Thanks
JAZA KALLAH KHAIR
ALLAH HAFIZ
FIAMANALLAH
Take care
bye

Q80BOY:
i agree with u, in the revision guide i use, the diagram shows a bung and an air lock

hope i helped  :)

By the way loved the beginning and ending of ur post  ;)

annie_angel:
i think it actuallly is A as if it is heated da yeast would be killed...and b4 da ethanol is made it would be of no use thn...hope this helps

annie_angel:

--- Quote from: Q80BOY on May 20, 2009, 01:04:11 pm ---i agree with u, in the revision guide i use, the diagram shows a bung and an air lock

hope i helped  :)

By the way loved the beginning and ending of ur post  ;)

--- End quote ---
bung and an airlock IS needed but if da thing is heated the yeast would die...

Q80BOY:

--- Quote from: annie_angel on May 20, 2009, 03:05:59 pm ---
--- Quote from: Q80BOY on May 20, 2009, 01:04:11 pm ---i agree with u, in the revision guide i use, the diagram shows a bung and an air lock

hope i helped  :)

By the way loved the beginning and ending of ur post  ;)

--- End quote ---
bung and an airlock IS needed but if da thing is heated the yeast would die...

--- End quote ---

ya, so its not A, cause A says that cotton wool is used  :-\

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