'Cause you said, said he was the one
Baby yes you said, said you were in love












Back to basics: Step 1
Arthur
JJC
Outgrowing 17
Dreamer
Poet
Lover
Atheist
Left-Handed Saggitarian

My passions: Step 2
Food
Company
Writing
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Debates


What i am: Step 3
Strengths:
Confident
Sensitive
Eloquent


Weaknesses:
Paranoid
Unorganized
Careless

Dreams of a globetrotter wannabe: Step 4
Paris
Shanghai
London
Gold Coast
Japan(Tokyo)
Rome
Taiwan
Hong Kong
New York
San Francisco
South Korea

Wishlist
My own domain
Scholarship
To publish a book

Want to know more about me?

Read my blog and you would start discovering fragments of me

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An error in 2008 'A' Level Chemistry Paper 1?
Tuesday, November 18, 2008, 8:33 AM

Like many of the other thousand 'A' Level candidates taking H2 Chemistry, I was stumped by one of the organic chemistry questions for H2 Chemistry Paper 1. Well, for those of you who don't know what I am talking about, it's question 20 for paper 1. The question was basically "Which two-srtage process will not give a good yield of 1,2-dibromocyclohexane?" The reaction is basically a two-step process.

What's wrong with the question? Nothing very wrong except that there were some weird reagents in the question. The first step's reagents were "normal" reagents but not the second. There were two options with these "weird" reagents. One of them being Br2,hv and the other being red P, Br2.

Some kind soul told me that red P is red Phosphorus which is a catalyst for bromination. I'm still not quite sure what hv is yet. I searched the net and came across it a couple of times but it didn't shed any light on what hv is. Anyone knows what's that? Anyway, now we all know that it's not some kind of printing error or error on Cambridge's side(as I thought it might have been during the 1 hour paper). It's kind of weird though that it was never taught(to me at least and some friends from other jcs) and I never came across it.

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