Multiple Choice (2 Viewers)

nifkeh

Member
Joined
May 29, 2012
Messages
383
Gender
Female
HSC
2013
Yeah.. you can't really make a cup out of cellulose =3= it's not even plastic
I fked up
no but cellulose is a type of organic fibre that you can make biopolymers out from.. hence you can make a cup out of it because it is plant fibre. like it comes from sugar cane
 

Praer

Active Member
Joined
May 10, 2012
Messages
352
Gender
Male
HSC
2013
Uni Grad
2017
A cup does not have to be plastic.
U could have the cup made out of polystyrene which was one of the options as well.
i read what it said on the cup and got D as my answer.
no but cellulose is a type of organic fibre that you can make biopolymers out from.. hence you can make a cup out of it because it is plant fibre. like it comes from sugar cane
So much shit just for 1 marker =3=
i put d. so hopefully ...
 

superSAIyan2

Member
Joined
Apr 18, 2012
Messages
320
Gender
Male
HSC
2013
i put D for 13 as well. it could be A though if they did cellulose--->glucose--->ethanol--->ethylene--->polyethylene.

Maybe they'll accept both answers? i think Its been done in the past
 

hamstar

Member
Joined
Oct 10, 2013
Messages
81
Gender
Male
HSC
2013
i put D for 13 as well. it could be A though if they did cellulose--->glucose--->ethanol--->ethylene--->polyethylene.

Maybe they'll accept both answers? i think Its been done in the past
Wat??? if you think about cellulose is the only correct answer. See how you have formed polyethylene from cellulose, the cup could also be polystyrene (which is one of the answers), which can be also formed through cellulose.

Unless all of them are right except for PVC, the only answer which seems to make sense the most is cellulose
 
Last edited:

leesh95

Member
Joined
Nov 7, 2011
Messages
487
Gender
Undisclosed
HSC
2013
I didn't even go through so much thinking. The cup said it was made from renewable resource and had picture of a tree -> cellulose
 

HowToNoob101

Member
Joined
Jul 15, 2013
Messages
56
Gender
Male
HSC
2013
For 17, weak acids do only partially ionise, but the reaction is an equilibrium reaction so every time the weak acids hydrogen ion is used to neutralise the base, according to Le Chatelier's principle the equilibrium will shift and release more hydrogen ion. This will continue until all the hydrogen ions have been released in neutralising the base.

Therefore you require the same volume as long as they are the same concentration.

Right?
 

Menomaths

Exaı̸̸̸̸̸̸̸̸lted Member
Joined
Jul 9, 2013
Messages
2,373
Gender
Male
HSC
2013
How do you guys remember what the questions were (were you allowed to take mcq home?)?
 

AfkForSoR

New Member
Joined
Oct 30, 2013
Messages
11
Gender
Male
HSC
2013
For 17 answer is greater than the volume as strong acids completely ionise and weak do not so it will continue to ionise as it is being titrated, requiring more volume to neutralise than the strong acid (i am 100% sure)
 

jk412

New Member
Joined
Jan 19, 2012
Messages
12
Gender
Male
HSC
2013
For 17 answer is greater than the volume as strong acids completely ionise and weak do not so it will continue to ionise as it is being titrated, requiring more volume to neutralise than the strong acid (i am 100% sure)
Nope, answer is B. (i am 100% sure)
 

freddo723

New Member
Joined
Sep 9, 2012
Messages
8
Gender
Male
HSC
2013
1.b
2.c
3.d
4.c
5.a
6.a
7.c
8.a
9.a
10.c
11.b
12.b
13.a d..... don't make it complicated. renewable, cellulose
14.b
15.c d.... concentration of H+ ions in pH of 3 is 0.01, concentration in pH 5 is 0.00001 therefore adding 1000 times original volume.
16.b
17.b
18.d
19.a
20.d
thats what i think but yeah let me know.... hahaha
 

Users Who Are Viewing This Thread (Users: 0, Guests: 2)

Top