multiple choice...WTF? (2 Viewers)

[daffidoll]

multiple coice...WTF?

okay, lookin at some anwsers, i gotta ask: 4 sulfuric acid log, isnt it b cause (H) is 0.1 times 2 cause is diprotic. that gives 0.2. then do -log(0.2) you get 1.
secondly, with ques 12, repeating improves accuracy! correct me if im wrong!

 

[100percent]

i think it was alright, not too hard. expecting 10/15 for it. i always get about 10 or 11 sometimes 12 out of 15 on pass papers. so real hsc is no exception

 

[taxman]

I found most of it pretty easy, but I found about two questions insanely difficult, particularly that last question which was uneccessarily hard...it took me about 3 minutes to figure out what exactly the question was asking. I wrote down my multiple choice results on my hand cos I had some extra time at the end.

They were:

B
C
B
D
B
A
C
B
B
C
A
B
C
C
B

 

[midnight_magick]

me got
1.B
2.C
3.B
4.D
5.B
6.A
7.C
8.A (diprotic)
9.D (weak acid and conj. base)
10.C
11.A
12.B
13.C
14.A
15.A (follow the mole ratios)

 

[queenie]

taxman got C for 14, and midnight got A... i got D..

reason:
river source will have highest dissolved oxygen, thus will be 2.
limestone quarry .. .limestone is basic, thus ph will be the highest, which is 3
which means that the town is 1
so D

What's wrong with my reasoning?

 

[midnight_magick]

dw, most likely me wrong lols!

 

[~SeXcSuM~]

i got B for 14 and a couple of others were different than wat some of u got hmm.. could be bad

 

[i_like_black]

taxman got C for 14, and midnight got A... i got D..

reason:
river source will have highest dissolved oxygen, thus will be 2.
limestone quarry .. .limestone is basic, thus ph will be the highest, which is 3
which means that the town is 1
so D

What's wrong with my reasoning?

exactly, i had that with the same reasoning, i think there're no doubt it's A or D, i went with the limestone making it more basic. so yeah. my vote goes to D

 

[LostAuzzie]

taxman got C for 14, and midnight got A... i got D..

reason:
river source will have highest dissolved oxygen, thus will be 2.
limestone quarry .. .limestone is basic, thus ph will be the highest, which is 3
which means that the town is 1
so D

What's wrong with my reasoning?

That was the same as I got with basically the same reasoning except I said there would be a lot of micro-organisms from the town sewerage thus high BOD, thus Town was 1

 

[queenie]

exactly, i had that with the same reasoning, i think there're no doubt it's A or D, i went with the limestone making it more basic. so yeah. my vote goes to D

score! 10car

 

[stef.]

stupid diprotic sulfuric acid...

i though about it when making my answer..but then thought...nah..they wouldnt make the exam that tricksy.

the world is collapsing around me...

curse u Q8!

 

[adrenaline88]

that multiple choice section was super-gay.

 

[Captain pi]

It was definitely the hardest multiple-choice session I have done. I got Q1 wrong (wrote D (electrons : neutrons) instead of B (protons : neutrons)).

And 15 was A (0.15).

 

[Dumsum]

me got
1.B
2.C
3.B
4.D
5.B
6.A
7.C
8.A (diprotic)
9.D (weak acid and conj. base)
10.C
11.A
12.B
13.C
14.A
15.A (follow the mole ratios)

I got exactly the same as you. Go us

Except I just realised that 14 is D. In the rush of the exam I read the lower pH as it meaning it was basic... good work Simon.

 

[raspb3rry]

me got
1.B
2.C
3.B
4.D
5.B
6.A
7.C
8.A (diprotic)
9.D (weak acid and conj. base)
10.C
11.A
12.B
13.C
14.A
15.A (follow the mole ratios)

Basing on your answers, I have 4 wrong =D! Yay (its a start for me lol).

 

[chooette]

Some were annoyign and hard, although if you worked at them, some seemed to come out... What was the answer for the buffer one?? Mostly ok, and straigtforward

 

[darkwarrior2]

q 15

for q15 wouldnt it be 1.2? for O2?D

Since if O2 = 1.2 then MnO...is .6 1mole of O2 = 2x Mole of MnO = .6
then MnO...=I2

then it halves again to give 0.6.
i also has the other reasoning where if O2 = .15 then it doubles 2wice.

Edit: dw, i got confused with molar ratios >< i think i did it with most of the molar ratio stuff. 2NO2 -> N2O4 as well. Hope they're lenient on marking.

 

[SmileyCam]

that's so wrong, I got:
1) B
2) C
3) B
4) D
5) B
6) A
7) C
8) C
9) D
10) C
11) A
12) B
13) C
14) D
15) A

 

[justchillin]

Lol they were easy...but I dunno about question one...radioactivity isnt about too many neutrons and protons is about raito of neutrons: protons. So D is the answer because too many electrons = too many protons for the number of neutrons...I think anyway? My answers were: D, C, B, D, B, A, C, A, D, C, A, B, C, A, A...

 

[queenie]

that's so wrong, I got:
1) B
2) C
3) B
4) D
5) B
6) A
7) C
8) C
9) D
10) C
11) A
12) B
13) C
14) D
15) A

dude, ur h2so4 is stuffed, its a strong acid