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November 01, 2025, 12:01:46 pm
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destain

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2009 exam
« on: June 02, 2012, 10:09:29 pm »
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I'm not sure if I'm just tired but with question 4 in section B, in 4d, what's the explanation behind the fact that each H2 molecule accounts for one double C=C bond...
If you don't have the exam, its because the ratio of mycerene to H is 1:3 and myceren reacts with H and it is polyunsaturated and when it reacts it becomes saturated.
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thushan

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Re: 2009 exam
« Reply #1 on: June 02, 2012, 10:11:29 pm »
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Quote from: destain on June 02, 2012, 10:09:29 pm
I'm not sure if I'm just tired but with question 4 in section B, in 4d, what's the explanation behind the fact that each H2 molecule accounts for one double C=C bond...
If you don't have the exam, its because the ratio of mycerene to H is 1:3 and myceren reacts with H and it is polyunsaturated and when it reacts it becomes saturated.

so C=C, when H2 reacts with one C=C double bond, one H atom attaches to each carbon, breaking the double bond.

So 1 C=C needs 1 H2.
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destain

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Re: 2009 exam
« Reply #2 on: June 03, 2012, 01:11:01 am »
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ooo i seeeee...i was thinking of it as just H not H2 and i was getting confused
thanks :D
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sin0001

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Re: 2009 exam
« Reply #3 on: June 03, 2012, 02:08:32 am »
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that was a hard question in the exam :/
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Re: 2009 exam
« Reply #4 on: June 03, 2012, 01:16:32 pm »
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I almost made the same mistake :p That's why you have to register every word that you read. Particularly with multiple choice questions I tend to write out formula or draw structures to affirm certain compounds in my mind.
« Last Edit: June 03, 2012, 02:31:16 pm by charmanderp »
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thushan

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Re: 2009 exam
« Reply #5 on: June 03, 2012, 01:44:45 pm »
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Quote from: charmanderp on June 03, 2012, 01:16:32 pm
I almost made the same mistake :p That's why you have to register every word that you read. Particularly with multiple choice questions I tend to right out formula or draw structures to affirm certain compounds in my mind.

Observes essence of genius and proness oozing out of above post...
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charmanderp

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Re: 2009 exam
« Reply #6 on: June 03, 2012, 02:31:02 pm »
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If you're talking about the massive grammatical slip up, I am thoroughly embarrassed!
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thushan

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Re: 2009 exam
« Reply #7 on: June 03, 2012, 03:12:43 pm »
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Quote from: charmanderp on June 03, 2012, 02:31:02 pm
If you're talking about the massive grammatical slip up, I am thoroughly embarrassed!

Sly.... :P

But I actually meant you sounded pro :P thanks for pointing out your own epic fail for the whole world to see :P :P
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charmanderp

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Re: 2009 exam
« Reply #8 on: June 03, 2012, 03:17:52 pm »
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Awks :p
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pi

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Re: 2009 exam
« Reply #9 on: June 03, 2012, 04:24:30 pm »
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Putting this out there early, but charmanderp may be AN's next mchli/thushan (both are genius level) :D

But the best way to get a 50 in chem is to eat Vegemite.
« Last Edit: June 03, 2012, 07:00:15 pm by thushan »
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charmanderp

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Re: 2009 exam
« Reply #10 on: June 03, 2012, 04:34:22 pm »
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No way man haha. Our Methods cohort has about 250 kids and I'm in the bottom 100 for SACs. I think that negates any comparison :p
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thushan

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Re: 2009 exam
« Reply #11 on: June 03, 2012, 06:51:47 pm »
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Quote from: charmanderp on June 03, 2012, 04:34:22 pm
No way man haha. Our Methods cohort has about 250 kids and I'm in the bottom 100 for SACs. I think that negates any comparison :p

You go to Melbourne High.
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pi

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Re: 2009 exam
« Reply #12 on: June 03, 2012, 06:55:47 pm »
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Quote from: thushan on June 03, 2012, 06:51:47 pm
Quote from: charmanderp on June 03, 2012, 04:34:22 pm
No way man haha. Our Methods cohort has about 250 kids and I'm in the bottom 100 for SACs. I think that negates any comparison :p

You go to Melbourne High.

He doesn't?


AND STOP EDITING MY POSTS THUSHAN! I'm fixing it :P
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thushan

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Re: 2009 exam
« Reply #13 on: June 03, 2012, 06:57:10 pm »
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Quote from: VegemitePi on June 03, 2012, 06:55:47 pm
Quote from: thushan on June 03, 2012, 06:51:47 pm
Quote from: charmanderp on June 03, 2012, 04:34:22 pm
No way man haha. Our Methods cohort has about 250 kids and I'm in the bottom 100 for SACs. I think that negates any comparison :p

You go to Melbourne High.

He doesn't?


AND STOP EDITING MY POSTS THUSHAN! I'm fixing it :P

Doesn't he? I swear when I met him he was wearing his Melb High uniform...

And pi I wasn't editing your posts, I'm just...um...improving them as to enhance their accuracy.

Moderator action: removed real name, sorry for the inconvenience
« Last Edit: January 03, 2017, 12:21:48 am by pi »
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pi

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Re: 2009 exam
« Reply #14 on: June 03, 2012, 07:02:42 pm »
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Quote from: VegemitePi on June 03, 2012, 04:24:30 pm
But the best way to get a 50 in chem is to eat Vegemite.

This is thushan's advice, not mine for anyone reading my post :P


btw, vegemite is disgusting :(
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