Qualification > Sciences
Chemistry Paper 1
nid404:
--- Quote from: Naruto on June 10, 2009, 03:05:37 pm ---hey
i have attached the questions that i dint understood...plzzz telll me the answer so that i can check that whether the answer that i have are right or wrong :-\ and plzzz try to explain your answers thanks
--- End quote ---
25 is A. Magnesium is more reactive than carbon..carbon cannot reduce magnesium from its oxide. So the mixture remains black and there's no change in limewater
37 is A. Both can be used as fuels
39 is D. Just add the products' molecular formula. CH4 and 2 molecules of C2H4 will give C5H12
qwert101:
--- Quote from: Naruto on June 10, 2009, 04:05:58 pm ---ok now i have attached the question so plzz check them above...
thank U :)
--- End quote ---
all A
last one is D
Ghost Of Highbury:
--- Quote from: Naruto on June 10, 2009, 03:05:37 pm ---hey
i have attached the questions that i dint understood...plzzz telll me the answer so that i can check that whether the answer that i have are right or wrong :-\ and plzzz try to explain your answers thanks
--- End quote ---
okk no idea abt the 37th one
but the rest 2
q25.) i think its A...because Magnesium oxide cannot be reduced
q38.) ans - "D" -- C5H12 ==> C2H4 + C2H4 + CH4
Ghost Of Highbury:
its written 2 molecules of ethene so wont it be "D"
nid404:
@ Yu Si-hun: Delete the sites right away or u will be banned
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