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Chemistry 31?? hell??
- Thread starter zainabd
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True that, it was freakin easy, definitely not losing more than 5-7 marks. 
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actually it wasn't bad, it is just that examiners are getting a bit retared, no offence, but if u want us to explain something at least provide sufficient lines...and a few wacko questions here and there but for me it is still better than paper 6 chemistry ..i hope everyone gets a good mark ^__^
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zainabd said:How was it?
i found it really difficult?
the format of the papers has changed...
wishing the grade thresholds are low
EVEN ME TOO FELT VERY HARD
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guys if i got a high A in p3 and a high A in p1 and lets say a high B in p6 !! would i get an A* or an A??? :%)
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it was vrt esy..
nd yes narutogirl i agree...they shud provide more lines..!! :/
bt it was esy...but goin to lose marks..:'(
nd yes narutogirl i agree...they shud provide more lines..!! :/
bt it was esy...but goin to lose marks..:'(
Can someone tell me the answer to
1) Which of the acid reaction is the redox reaction and the reason? (Li + HI), (Zinc Carbonate + HI) or (the one with MgO)
2) Which carboxylic acid forms when acidified potassium manganate react with Butanol? and its structural formula?
For your info, I choose:
1) One with MgO, as oxygen is involved (the explanation probably wrong)
2) Butanoic Acid, CH3CH2CH2COOH
Can someone confirm?
1) Which of the acid reaction is the redox reaction and the reason? (Li + HI), (Zinc Carbonate + HI) or (the one with MgO)
2) Which carboxylic acid forms when acidified potassium manganate react with Butanol? and its structural formula?
For your info, I choose:
1) One with MgO, as oxygen is involved (the explanation probably wrong)
2) Butanoic Acid, CH3CH2CH2COOH
Can someone confirm?
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I guess the 1) is Li+HI =LiI +H
Lithium is oxidized and hi is reduced
And 2) yes its butanoic acid c3h7cooh
And was that q the last one butanol + ethanoic acid does the compound called ester and the molecular formula what was it ?!
Lithium is oxidized and hi is reduced
And 2) yes its butanoic acid c3h7cooh
And was that q the last one butanol + ethanoic acid does the compound called ester and the molecular formula what was it ?!
I got 1.33 mol/dm^3 too. But I doubt if I can score the mark for method, as I forgot to convert the 20 cm^3 and 15 cm^3 into dm^3 for the working (it doesn't affect the result).
So I did:
1 x 20 / 15 = 1.33 mol/dm^3
though the result is the same because 1 x 0.02 / 0.015 = 1.33 mol/dm^3. Do you think it matters id I didn't convert as long as results are correct? And it was a 3 mark question how many marks do you think I can get?
So I did:
1 x 20 / 15 = 1.33 mol/dm^3
though the result is the same because 1 x 0.02 / 0.015 = 1.33 mol/dm^3. Do you think it matters id I didn't convert as long as results are correct? And it was a 3 mark question how many marks do you think I can get?