Qualification > Sciences
IG Chemistry Paper 3 discussion
emi:
any one remember the marks for these Questions ?
1- Q1 & 2 the chlorophyll ones
2- the moles one ( balancing the formula & last one & the limiting reagent one)
3- Metal T
can u tell separate marks for each ?
thukon:
Wait a sec. I think ppl are trying to discuss the same answers to different questions. For the T metal question, how many people got a question where it gives you the volumes of reactant? (namely 6cm3 and 18cm3)
And for the "2 blanks" question, how many people got a question asking which groups the lactic acid contains? Because i wrote Carboxylic acid, and alcohol. And many ppl are saying they wrote "alkyl" and alcohol. I mean.... where did alkyl pop up from? Theres definitely no alkyl group in lactic acid...
My bad. There is an alkyl group, but the question was identify the FUNCTIONAL GROUPS. Alkyls are not functional groups. Only OHs and COOHs are.
Kim:
--- Quote from: emi on June 02, 2009, 10:31:50 am ---any one remember the marks for these Questions ?
1- Q1 & 2 the chlorophyll ones
2- the moles one ( balancing the formula & last one & the limiting reagent one)
3- Metal T
can u tell separate marks for each ?
--- End quote ---
the chlorophyll one had 3 marks
the metal T had 3 marks
balancing was 2 marks and the limiting reagent was 2-3 marks(don't remember)
evilzurg307:
--- Quote from: abdulrahman101 on June 01, 2009, 10:39:57 pm ---
--- Quote from: mr3bood on June 01, 2009, 10:30:22 pm ---what about the chlorophyll question?....the first one where it says *how can you show that this green solution contains chlorophyll*?...and the second one that has 3 marks!...*expain the role of chlorophyll*?...
--- End quote ---
u add iodine it turns black, i wrote stuff like photosynthesis, and gives it its colour, and absorbs light etc, last time i read bout chlorophyll was years ago lol
--- End quote ---
the answer was put one drop of chlorophyll beside one drop of pigment on the blotting paper.
araim93:
YES I PUT T3PO4 as well!!! ;D :D ;) :)
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