Qualification > Sciences
CHEM AND BIO HELP AND TIPS HERE
Ghost Of Highbury:
--- Quote from: the golden girl on May 07, 2010, 03:35:19 pm ---guys whenever a question comes and any oxide "batani7!!" ....i don't anythin hat's related to oxides ..... and stuff ...the only thing i kno abt oxides is that the non-mtealic r acidic and the metallic r basic ..and there r some amphotaric ....... can someone plz explain to me ..
ummm ohh and another thing ....there is this weird question that i'd like u to look at, it's jun 2000 paper 1 chem ig question 26) ..
http://www.freeexampapers.us/IGCSE/Chemistry/CIE/1993-2003/ChemistryExamP1.pdf
thx in advance
--- End quote ---
cud u be more specific abt oxides, i mean what exactly do u want to know abt?
and wat the helll is batani7? never heard abt that :-/
holtadit:
--- Quote from: Ari Ben Canaan on May 07, 2010, 03:49:57 pm ---Okay the answer is 26 B. Heres the explanation coming up....
--- End quote ---
Magnesium and Zinc react with steam to form HYDROGEN !!! SO those two arent correct.
Copper is unreactive and doesnt react with steam so it can be the correct one.
Thus, Iron is the only one that when heated and reacted with Steam forms its OXIDE and HYDROGEN GAS.
Ghost Of Highbury:
@Ari - its B, not A.
Copper will not displace Hydrogen. Iron will. and give release the hydrogen.
holtadit:
--- Quote from: A@di on May 07, 2010, 04:00:48 pm ---@Ari - its B, not A.
Copper will not displace Hydrogen. Iron will. and give release the hydrogen.
--- End quote ---
Sorry, it was a typo I meant B. I changed it and gave an explanation. :D
Ghost Of Highbury:
its okay. +rep
anyway, gas Q is H2, as the metal will displace hydrogen not oxygen.
out of copper and iron, iron is above hydrogen in the series, thus iron.
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