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Chemistry Help HERE ONLY !!
nid404:
--- Quote from: sgvaibhav on May 31, 2009, 12:17:13 pm ---Give
examples
of Oxidising agent and Reducing Agnet
Test for Oxidising agent
--- End quote ---
potassium dichromate is an oxidisng agent
Carbon, Carbon monoxide r reducing agents
but there r so many more depending on different redox reactions
testing....as in color change with change in oxidation state???
if so then ive ans it before.....u need to know manganate to manganese salt(reduction, color change from purple to colorless) and iodide to iodine(oxidation, colorless to brown)
emi:
the thing is that if u see that markscheme and match it with the Question paper if doesnt match at all .. in Question paper the first Questions talk about liquid fuels obtained from petroleum while in the mark scheme it says 1) different boiling points ??
part b) says magnesium carbonate reactions with HCL to form a salt name that salt
the markscheme says Volume decreases for forward reaction.
what i mean is that its not related at all
Kim:
test for oxidising agents
potassium iodide changes from colourless to yellow brown when added to a oxidising agent
test for reducing agent
add potassium dichromate colour colour changes from orange to green
add potassium manganate colour changes from purple to colourless
nid404:
--- Quote from: emi on May 31, 2009, 12:36:37 pm ---the thing is that if u see that markscheme and match it with the Question paper if doesnt match at all .. in Question paper the first Questions talk about liquid fuels obtained from petroleum while in the mark scheme it says 1) different boiling points ??
part b) says magnesium carbonate reactions with HCL to form a salt name that salt
the markscheme says Volume decreases for forward reaction.
what i mean is that its not related at all
--- End quote ---
i think ur looking at 2 diff papers cuz it's perfectly matching for me.
nid404:
ill put the question paper up for u emi
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