How Was Chemistry Paper 22, MAY/JUNE 2017?

[Zaki ali asghar]

Whats your estimate on the threshold can it be as high as 50?

 

[Error Syntax]

Whats your estimate on the threshold can it be as high as 50?

No , i think there is always an approximate margin of 45 marks or less for an A and as it is earlier discussed in this forum that although the paper looked easy its still may have many chances that candidates have messed up the paper.

 

[Cherry lava]

What about the mechanism guys ?
And nitrogen equations ?
Got them all right ??

 

[Cherry lava]

I think it was Fe3+ ions

I wrote Cobalt

 

[Error Syntax]

What about the mechanism guys ?
And nitrogen equations ?
Got them all right ??

what did you write in the Nitrogen equations?

 

[Zaki ali asghar]

The one as catalyst those were N02+S02-->S03+No
And 2NO+O2-->2NO2

 

[Cherry lava]

what did you write in the Nitrogen equations?

So2 + no2 = so3 + no
So3 + h2o = h2so4

 

[sarmadimran]

I dont know exactly but the answer was around 10.9940 something this isnt an accurate value its just my rough estimate of what i remember.

10.9941 was the answer

 

[sarmadimran]

What was the role of NO2? I wrote oxidises so2 to so3

 

[sarmadimran]

No , i think there is always an approximate margin of 45 marks or less for an A and as it is earlier discussed in this forum that although the paper looked easy its still may have many chances that candidates have messed up the paper.

Gt will be 48-49

 

[Error Syntax]

What was the role of NO2? I wrote oxidises so2 to so3

yeah it helps in oxidation and acts as a catalyst

 

[sarmadimran]

yeah it helps in oxidation and acts as a catalyst

Nope..NO acts as a catalyst not NO2

 

[Laversc]

Has anyone written paper 21 ? I found that paper hard.

 

[Momal AR]

Has anyone written paper 21 ? I found that paper hard.

it was hard, the paper could be messed up so easily

 

[Talha Jameel]

it was hard, the paper could be messed up so easily

Exactly... many of my friends messed it up

 

[Laversc]

Has anyone written paper 21 ? I found that paper hard.

yea that paper was so strange

 

[Laversc]

Exactly... many of my friends messed it up

what do you rate you got ?

 

[Talha Jameel]

what do you rate you got ?

+-50

 

[Laversc]

+-50

did you get that q and p thingy as propnal and propanone

 

[Laversc]

+-50

and did you get something like 0.0367 g for the mass of propanol in the first question