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2016 AQA GCSE Chemistry Unofficial mark scheme 2016

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I think i got somewhere between 50 and 55 (hopefully)! Opinions on what grade please? I feel like Boundaries will be high this year!

Reply 341

Teenw123

Original post by srmed

Was the two conditions for cracking: high temperature and hot catalyst

Posted from TSR Mobile

No, it was high temperature and high pressure

Reply 342

tamanna___

Before the tick box question there was another question saying what is the process xalled and the answer was Thermal decomposition

Also the answers you put under Q2 was actually Q3 and the 6 marker was Q 2c

Reply 343

Adzkii786

Original post by krystal16

I think i got somewhere between 50 and 55 (hopefully)! Opinions on what grade please? I feel like Boundaries will be high this year!

53/60 - a*
45 - a
37 - b
29 - c

Reply 344

Snakeyyyyyy

Original post by samreen.iqbal

Anyone think it was hard?

i know everyone was saying it was easy, i found it hard tbh, but i really want a B i know the grade boundaries were high, im really upset i was looking forward to the chemistry exam, usually chemistry is my strongest subject. hopefully i do well in the up coming science exams,, tbh the biology wasnt hard just weirdly worded. I hope you do well in your upcoming exams i wish you the best and anyone else who found it hard/quite hard/ extremely difficult if you know u gave it your all im happy for you.

Thank you.

Reply 345

dhruvap

Original post by Adzkii786

53/60 - a*
45 - a
37 - b
29 - c

53 is too high... i say around 49-50.

Reply 346

romansholiday

Original post by Laurantaylor

Did anyone know the black substance???

Soot (carbon) due to incomplete combustion/unburnt fuel (it says this in the spec)

Reply 347

Ahmed74

Original post by Teenw123

No, it was high temperature and high pressure

No, it was a catalyst.

Reply 348

krystal16

Original post by Laurantaylor

Did anyone know the black substance???

carbon particles

Reply 349

Ahmed74

Original post by dhruvap

53 is too high... i say around 49-50.

That's far too high, I can't remember an A* ever being over 50.

Reply 350

Zaza2000

The thing is there has never been a grade boundary where an A* is more than 50.
55/60 is over 90%. A*'s are usually at 80%-85% max. As 2013 and 2014 were 47/60 for an A*, it is likely that this year could also be 50. Maybe it will be 53/60, but I doubt it will go higher than that.

Reply 351

WarByte

The first question it was asking what was wrong with neon's structure. The first part only was about boron. The question about sub atomic particles were only the ones in part Z (nucleus), so proton and neutron.

Reply 352

CaptErin

I put high temperature and mixed with steam for cracking because obviously that's the other method; do you think that will also be credited or that they were specifically looking for hot catalyst? I almost put hot catalyst but changed my mind at the last second :/

Reply 353

Teenw123

Original post by SmithAmelia

I think so because I remember the question saying give 3 reasons why the car is reused and not recycled or sent to landfill sites.

It was why it its recycled and not reused or sent to landfills

Reply 354

Himtiaz

https://www.youtube.com/watch?v=iygdPjtFu28

Reply 355

Dizgurl

Original post by Adzkii786

53/60 - a*
45 - a
37 - b
29 - c

53 would be quite a bit too high.. :h:

counted 17 not bad

i said that crude oil is a faster process so you can meet the demand that people need for ethanol, do you think this will get me 2 marks or just one?

Reply 358

Ahmed74

Isn't it this:
2Fe2O3+ 3C = 2Fe2+ 3CO2

Reply 359

t10r

Right, I sent the same question before and no one answered me so let's try again:

For the question about making the experiment more accurate, would having the spirit burner in a container inside the conical flask so that the water was surrounding the spirit burner, reducing the amount of heat that is lost to the surroundings, award any marks at all?

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