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CHEMISTRY PAPER 3 DOUBTSS!!
you'll see this will exactly be the paper It has already happened in Physics and Biology practicals. Not saying it's students' fault, teachers leak out of course. -
CHEMISTRY PAPER 3 DOUBTSS!!
this is the end of cambridge's standard... Students know the answers before reading the question paper We really proved ourselves an 'honest' nation -
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CHEMISTRY PAPER 3 DOUBTSS!!
Can you quote the particular question? Because starch may have some purpose in that particular instance but if manganate ions are used, and the solution turns from purple to colorless, then it's because of sulfite ions. Basically the sulfite ions get oxidized to sulfate ions because potassium... -
CHEMISTRY PAPER 3 DOUBTSS!!
guys it depends on the reagents you are using... Since the question paper guides us thoroughly, for instance, if we are asked to use Al foil and OH- then we can expect NH3 only, no other gas gets liberated with Al and OH-. If we are using dilute acids, then it could either be CO2 or SO2, if you... -
CHEMISTRY PAPER 3 DOUBTSS!!
In the qualitative analysis, marks are awarded for observations and drawing conclusions only. We don't need to know the process of what exactly is happening during the reactions. While testing for FB5 in 3 a)i), since we are told that FB5 is an element, it most likely could be a metal and... -
Physics: Post your doubts here!
won't it be too fast to measure period of such oscillations? how do we do it then? -
HOW WAS CHEMISTRY P42 MAY/JUNE 2017 (POLL)
no no I don't think so.. plus I just used 'en' instead of the whole bidentate ligand name, so it was much simpler to draw than this -
HOW WAS CHEMISTRY P42 MAY/JUNE 2017 (POLL)
I left the angelic question because I thought I'll come back to it later, at the end, but ran out of time :cry: the bidentate isomers were like this: trans first then cis had it's optical isomer -
HOW WAS CHEMISTRY P42 MAY/JUNE 2017 (POLL)
exactly I was thinking the same.. I had just revised all the AS because I was taking composite and I won't have done if I had been taking A2 only.. and therefore I could do all the halogen testing and mechanisms without problem. I just checked up my bidentate isomers, I drew them correct! :D So... -
HOW WAS CHEMISTRY P42 MAY/JUNE 2017 (POLL)
HAAHAHAHAHA :ROFLMAO::ROFLMAO: OMG! This was epic!:LOL: -
HOW WAS CHEMISTRY P42 MAY/JUNE 2017 (POLL)
haha thanks no use to me for all the research I did on that fac mer if I myself end up drawing those wrong... I made them in literally last two minutes, had no time to think so not even sure if they'll get credit! :cry: -
HOW WAS CHEMISTRY P42 MAY/JUNE 2017 (POLL)
The 'angelic' examiner also found a way to test cis-trans and optical isomers in the same complex! How cool! -
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HOW WAS CHEMISTRY P42 MAY/JUNE 2017 (POLL)
Guys wtf was this paper! what the hell! this was nowhere to be done in 2 hours! Examiner needs to be stabbed with all those stab questions and that angelic acid was nowhere angelic! It was hell! How the hell was I supposed to think about all that in 4 minutes for those 4 marks in that angelic... -
Chemistry: Post your doubts here!
hahahah that's okay post yours too -
Chemistry: Post your doubts here!
In the 'fac' isomer, the similar ligands define the face of octahedron, which will run in 3 different directions. Like in the image, you can see one Cl ligand goes in the plane of paper, one out, towards you and the 3rd in (away from you). This makes the face of isomer. To draw the two... -
Chemistry: Post your doubts here!
It's called 'fac' 'mer' isomerism. Because around the metal, the 6 ligands form an octahedron which can go in 3 different different directions so form 2 different isomers. First you need to understand that there are 3 directions and really imagine them in your head this way, when you look at... -
Chemistry: Post your doubts here!
I think it's because Vanadium exists in multiple oxidation states +2, +3, +4 and +5 .. The V3+ ions are further oxidized by iron to V+4 (i.e. VO2+), therefore the equation is a bit different from one we are expecting