Physics, Chemistry and Biology: Post your doubts here!

[Ahmed Elsiddig]

Am I the only one who noticed a mistake in paper 11 in the reactivity series as Y wasn't mentioned

 

[samermadrid]

I saw it too

Am I the only one who noticed a mistake in paper 11 in the reactivity series as Y wasn't mentioned

 

[Bah...]

Hey guys!
I did chem 11 and 31 tday. It wasn't that bad. Anywhooo I have a question. That question in paper 3 with the test tube put into an ice bath yada yada... whats the answer??

 

[loaie Amgad]

Am I the only one who noticed a mistake in paper 11 in the reactivity series as Y wasn't mentioned

it wasnt a mistake
Believe me Its a 100% correct question but with a small trick

 

[Saad the Paki]

Hey guys!
I did chem 11 and 31 tday. It wasn't that bad. Anywhooo I have a question. That question in paper 3 with the test tube put into an ice bath yada yada... whats the answer??

Exothermic
Forward reaction favoured by low temp
More yield ICl3
Yelllo solid produced

 

[Saad the Paki]

Am I the only one who noticed a mistake in paper 11 in the reactivity series as Y wasn't mentioned

Yup ..it was no mistake

 

[Ahmed Elsiddig]

Thenwhat was the trick...If Y wasn't mentioned then u just cant fit Y in an order...they didnt describe its properties

 

[DANISH182]

hey in 32 it says what will happen to ethanol in presence of oxygen??

 

[Saad the Paki]

Thenwhat was the trick...If Y wasn't mentioned then u just cant fit Y in an order...they didnt describe its properties

Dey said ONLY W and Z can be reduced by carbon which means X amd Y r above carbon
Then dey say ONLY X will react wid cold water so it means Y must be after X but b4 W and Z

 

[Saad the Paki]

hey in 32 it says what will happen to ethanol in presence of oxygen??

I didnt do 32
But i guess the answer is it will form ethanoic acid

 

[DANISH182]

I didnt do 32
But i guess the answer is it will form ethanoic acid

yeah i wrote that but some of my friends suggests that it will produce co2 and water

 

[Ahmed Elsiddig]

i wrote this very answer but still...they said that W exists as a native metal then later said it can be reduced by Carbon...i think someone wrote W by mistake instead of Y

 

[Ahmed Elsiddig]

I didnt do 32
But i guess the answer is it will form ethanoic acid

What did u write in the question about coal and and wood

 

[sj0007]

i wrote this very answer but still...they said that W exists as a native metal then later said it can be reduced by Carbon...i think someone wrote W by mistake instead of Y

Yeah, so W can exist as native element and be reduced by carbon at the same time cuz it is lower than carbon in the reactivity series (any thing below carbon can be reduced by it)

 

[masterex567]

Yeah, so W can exist as native element and be reduced by carbon at the same time cuz it is lower than carbon in the reactivity series (any thing below carbon can be reduced by it)

I put the native element the last. The one that reacted with cold water the highest. What did you put?

 

[masterex567]

What was that reversible reaction of Copper chloride of blue and pink in paper 11? I know it turns back to pink, but does temperature increase or decrease in the reverse reaction?

 

[Bah...]

Exothermic
Forward reaction favoured by low temp
More yield ICl3
Yelllo solid produced

Dammit....

 

[shingiechingz@8]

Did anyone do already the exam? (If yes tell me everything please.
) 31

it was awesome!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 

[shingiechingz@8]

guys paper was easy hopefully will get 70 above in p3 just because of my silly mistake and p1 is like wow!!!!
i am happy today too much because chemistry is over

awesome right?

 

[sj0007]

I put the native element the last. The one that reacted with cold water the highest. What did you put?

Same, cuz like they told us to write the most reactive first!