KBT: What the heck is wrong with my eyes?!

[Destiny]

Questions



Answers

My answer is highlighted Is it just me or are the letters in the answer wrong?

[pi]

Yeah, from memory they had a mistake like this

[Destiny]

So I should perhaps tick it then

[charmanderp]

I was too busy crying from how difficult the KBT exam was to notice this haha.

[soccerboi]

I haven't done this exam yet, but would you go as far as saying that this is the hardest chem u3 exam of all? Is it even VCAA  standard? and what's so hard about it, lik are the questions still within the scope of the course?

[Destiny]

2a, the bit with alkynes looks off the course, but I'm stil working thru it

[Lasercookie]

I haven't done this exam yet, but would you go as far as saying that this is the hardest chem u3 exam of all? Is it even VCAA  standard? and what's so hard about it, lik are the questions still within the scope of the course?

It isn't VCAA standard, but it's definitely within the scope of the course. The questions are quite challenging, but they're all do-able with Unit 3 knowledge. Give it a shot, it's good fun.

There's a few questions that required recalling a bit of year 11 knowledge (Q1 MC sort of).

2a, the bit with alkynes looks off the course, but I'm stil working thru it

This might spoil the answer:
I'm pretty sure it was just there as a distractor. Through working out, you can narrow it down to double bonds
I guess it's similar to how VCAA and trial exams throw in questions involving ketones and aldehydes.

[Destiny]

Yeah, I had no problems doing that question, but if it mentions Alkynes, out of the course :> xD
Got a bit lost on the ninhydrin one.  Wonder whether VCAA would want us to know that... D::

[Nobby]

What'd everyone here get on it? I battled my way through and managed a 71/78.

[Lasercookie]

Got a bit lost on the ninhydrin one.  Wonder whether VCAA would want us to know that... D::

It's come up previous VCAA exams, but they provided context and explain what it is e.g.
VCAA 2003 Exam 1 SA Question 5

Amino acids are colourless, but the position of an amino acid spot on the strip can be seen by spraying the strip with a solution of ninhydrin, a substance that reacts with amino acids to produce an intense purple colour.

On that VCAA exam, you didn't really need to discuss ninhydrin in your answers though. I can't remember where I had read about it before, I don't think it was in the textbook.

[Deceitful Wings]

yea i got the same answers as you
I am not sure how question 4 of the multiple choice was C though. I thought it would be A, can someone explain the reasoning?

[Truck]

Got a bit lost on the ninhydrin one.  Wonder whether VCAA would want us to know that... D::

It's come up previous VCAA exams, but they provided context and explain what it is e.g.
VCAA 2003 Exam 1 SA Question 5

Amino acids are colourless, but the position of an amino acid spot on the strip can be seen by spraying the strip with a solution of ninhydrin, a substance that reacts with amino acids to produce an intense purple colour.

On that VCAA exam, you didn't really need to discuss ninhydrin in your answers though. I can't remember where I had read about it before, I don't think it was in the textbook.

http://www.chemguide.co.uk mentions it .