2016 A Level H2 Chemistry Paper 2, 3, 1 discussions
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Originally posted by ArJoe:
Yup true, i think it is just that our school teachers do not want us to take the risk.
anyway all the best for math paper 2, honestly speaking i hope that it is not too easy, so that the bell curve will not be too high…jiayous! statistics has always been standard..
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Originally posted by Thefire521:
Sekali later the case study is on UK's chemistry industry so we get chemicons
No pls.
Concerning the phenol question, I'm pretty sure either Cl2(aq) or Cl2/CCl4 will be accepted. They didn't specify mono/trisub, as zenthyl mentioned. People are weirded out because there're two answers, but many chemistry reactions can have different reagents and conditions- reduction of carbonyls for example.
As for the colours of halide displacement, I think it may be 2m for 4 colours + equation, 2m for data + explanation/feasibility. I doubt they'd give 3m for colours only when they requested explanation and data haha. If they're lenient you may get 1m for writing 1 correct colour.
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How fors h3bco look like?
For I2 aq i wrote it as yellow brown.. Will it be accepted?
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Originally posted by Sir3:
How fors h3bco look like?
For I2 aq i wrote it as yellow brown.. Will it be accepted?
h3bco has 2 dative bonds one from o to c and one from c to b
yellow brown you should have just written orange .....
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Originally posted by Thefire521:
h3bco has 2 dative bonds one from o to c and one from c to b
yellow brown you should have just written orange .....
For h3bco how does o form a dative bond with c since o alr forms a double bond with c
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Originally posted by Tresdin10hut:
For h3bco how does o form a dative bond with c since o alr forms a double bond with c
Why not? Try drawing it out. Nothing is impossible you gotta achieve octet
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To those of you who have tried the 2016 Singapore JC Prelim Paper 1s, can you share with the other students here (to help them with their last min revision), which Singapore JCs have the toughest 2016 Prelim Paper 1s? Rank the Top 3 most difficult papers, eg. 1st RJC, 2nd HCJC, 3rd VJC. You can include IP schools with A level Prelim papers eg. DHS.
An interesting observation : A neighborhood JC student of mine, last week tried out first the RJC and then the VJC 2016 Prelim papers. I asked him, how's the VJC 2016 P1 compared to the RJC 2016 P1?
He replied, "VJC 2016 P1 is waaaaaaaaay easier."
Next I asked, then how's the how's the VJC 2016 P1 compared to ur own (neighborhood JC's) Prelim 2016 P1?
He replied, "VJC 2016 P1 is waaaaaaaaay tougher."
LOL.
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Originally posted by UltimaOnline:
To those of you who have tried the 2016 Singapore JC Prelim Paper 1s, can you share with the other students here (to help them with their last min revision), which Singapore JCs have the toughest 2016 Prelim Paper 1s? Rank the Top 3 most difficult papers, eg. 1st RJC, 2nd HCJC, 3rd VJC. You can include IP schools with A level Prelim papers eg. DHS.
NYJC is interesting.
This year, not many of the top JCs produced exceptionally hard P1, likely because p1 is the least likely killer in A levels
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Originally posted by Thefire521:
NYJC is interesting.
This year, not many of the top JCs produced exceptionally hard P1, likely because p1 is the least likely killer in A levels
Good recommendation. The NYJC P1 is comparably delightful with the RJC P1. Here's hoping this Fri's P1 will be somewhere in between the RJC and NYJC papers. -
good luck all. im expecting an exciting paper. though p1 must score 40/40
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Originally posted by Thefire521:
good luck all. im expecting an exciting paper. though p1 must score 40/40
I'll leave it to you to post the answers to Paper 1. -
A couple of time-consuming MCQs, and several ridiculously easy MCQs. Overall, a standard paper. Then again, from P2 and P3, students don't seem to agree with my assessment. So I'll leave it to you guys to decide if this was a tough or easy Paper 1. I'll leave it to TheFire321 to post the answers.
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Manageable. Indeed ridiculously easy but many to trick students. Including the copper question
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Yeah, i got tricked by the copper question. Will Ultima be posting the ans? Or Fire.
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Give me a second. I need to get home. If u guys have any q for discussion u can ask first. Dont worry if u have some wrongm above 35 is safe enough regardless of bells
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Hi answers as follows. please say if you disagree.
BDCDACCDBDCACBDAAADDBBBADCABBBBACDCBCBAC
Are there any typos?
seems like cambridge like to repeat letters thsi year. so those people who anyhow guess random letter will ...
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Originally posted by Thefire521:
Hi answers as follows. please say if you disagree.
BDCDACCDBDCACBDAAADDBBCADCABBBBACDCBCBAC
Are there any typos?
23 is a C or?
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Originally posted by Thefire521:
Hi answers as follows. please say if you disagree.
BDCDACCDBDCACBDAAADDBBCADCABBBBACDCBCBAC
Are there any typos?
Agree with you for all answers except Q23. The atoms in propyne are s-sp-sp-sp3. -
My Q23 is B, and my Q38 is A.
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23 is definitely be. there isn't any sp2 carbon
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Originally posted by Thomas00:
My Q23 is B, and my Q38 is A.
Q23 is B too, Q38 option 3 is wrong as it should be a negative not positive charge i think?
For qn 11, Ag+ is reduced and Fe2+ is oxidized right? Hence to make it more negative shouldn't it be 'more' oxidation thus increase Fe2+ concentration (B) not C?
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Does anyone here have the h1 chem p1 answers?
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but if u increase option c, equilibrium will cause Eo value to shift to make-0.77 more negative. so it can be 0.00
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Originally posted by HardcoreBubbles:
Q23 is B too, Q38 option 3 is wrong as it should be a negative not positive charge i think?
For qn 11, Ag+ is reduced and Fe2+ is oxidized right? Hence to make it more negative shouldn't it be 'more' oxidation thus increase Fe2+ concentration (B) not C?
Ah i see, thanks.
For Qn 11,
Ag+ is reduced, Fe2+ oxidised.
Ecell = Red - Oxid
= 0.80-0.77
U want to make it 0, so have to increase 0.77 to 0.80, so increase Fe3+ can increase 0.77V to 0.80V. I think
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Guys, how come Q22 not C.