<p>Hi all,
I decided to start this thread so that those who’ve finished the test can discuss the q’s!</p>
<p>Overall, how hard do you think it was?</p>
<p>I forgot to put 2012 in the titli by the way… The test I am talking about is the 2012 June test</p>
<p>I only used PR and found the test harder than its practice tests!
True/False section was OK… but the first section was hard 
especially the ones about colors of compounds.</p>
<p>Does anyone know how many questions I can miss to get 770~ ?</p>
<p>Which was the least harmful compound? NH3, CO2, H2S, SO2, NO2
And which molecule contains a free electron NO2 or N2O?</p>
<p>CaCO3 + HCl gave out a bubbled gas.
BaSO4 is a white ppt
And NaNO3 + KCl no observation</p>
<p>I think the curve should be more leient. 81/85 for 800 is too much. Collegeboard, hear my voice lol</p>
<p>How many correct explenations did you guys get?</p>
<p>I think the least harmful compound was CO2</p>
<p>what were the questions with the matching with the chart with the excited electrons of hydrogen</p>
<p>i think i had only 2-3 correct explanations…</p>
<p>least harmful is NH3</p>
<p>ammonia is actually used in many pharmaceuticals in small amounts and is used to treat jellyfish stings</p>
<p>this Chem test was very easy, only thing I didn’t know was the graph of of Hydrogen’s electron thing at the end of the matching section.</p>
<p>800 for sure</p>
<p>NO2 has one free electron because it has an odd number of valence electrons whereas N2O has an even number. If you draw the lewis structure you will see there is one electron on N</p>
<p>least harmful is CO2 (your body produces it on its own was my reasoning) and NO2 has a free electron (coolguy253 explained this well already)</p>
<p>for the electron graphs, it took a bit of reasoning and hacking to remember the beginning of the chemistry year. </p>
<p>the question on the first excited state is A (sublevel 1 to 2)
lowest energy jump was from level 3 to 4
and ionization energy was from 1 to infinity (its gone by then…only choice that makes sense)</p>
<p>If you need anything, there is a list on the regular chem thread</p>