<p>and shaheiruddin if uve actually done the experiment for zn + hcl you know that ifzzes also… fizzing is just the gas amade in the liquid escaping…</p>
<p>There was a test question with zinc + HCl? </p>
<p>Around what number was it?</p>
<p>it was in the fisr section it had like 5 reactions and it aksed which one fit. It was right before the brass question.</p>
<p>i dont remember zinc + hcl as one of the choices : /
i know CaCO3 + acid was there though…
that reaction evolves CO2…</p>
<p>I’m pretty sure Zn + HCl wasn’t there for that set of questions (first 5). I know CaCO3 + acid produces CO2.</p>
<p>90% sure I picked that answer. I really can’t remember it clearly. I remember the question, not the answer.</p>
<p>I don’t remember 5 questions on reactions at the start.</p>
<p>What were the 5 reaction questions?</p>
<p>there were four reaction questions. and they werent at the very begginging
they were in the first section, but not the first 4 problems</p>
<p>i definitely remember adding zinc to hcl. well. 90% sure lol
whatever what’s done is done right?</p>
<p>so i think im at 5 or 6 wrong. no omits.</p>
<p>im retaking this in june anyway haha</p>
<p>I don’t remember Zn and HCl.</p>
<p>more and more im hearing that zn and hcl weren’t a choice. I just remember zn so i assumed that the hcl was there but now that i thnk about it i don’t really remember it…
pretty sure its calcium carbonate plus acid</p>
<p>I think it as another question. After the TTCE part I think. Not really sure.</p>
<p>it was Zn+Cu(NO3)2</p>
<p>AHH i actually dunno what to do…
i think i omitted around 6 and atleast got 3 or 4 wrong
What do u guys think my score will be? 
im not sure whether to cancel it or not yet</p>
<p>It was the CO2 producing reaction for the evolved gas…</p>
<p>i think i also picked the one with ca + h2no3 which produced cano3 + h2 i dont remember but i think i pickes something like that</p>
<p>yea itw as actually calcium carbonate(caco3) plus some acid which evolves co2</p>
<p>The one at the start was Zn + a Cu compound, and it was an oxidation-reduction reaction.</p>
<p>Edit: Also, don’t think we’ve discussed this question yet.</p>
<p>For the CH3COOH question, does it produce CO2 + O2?</p>
<p>If it combusts, it produces CO2 and O2. Otherwise, it merely dissociates into CH3COO- and H+ (it is a carboxylic acid).</p>
<p>Well, what was the question?</p>
<p>when something combusts it forms CO2 and H2O…</p>