How was Chemistry Paper 61 May June 2015

[FAHAD imtiaz]

Heats up more quickly and catching fire is same? If not then in total I've lost about more than 5 marks :/

 

[FAHAD imtiaz]

Now better to concentrate on upcoming bio p3 and 1 no need to cry over split milk

 

[FAHAD imtiaz]

Me too!
I also wrote that Ethanol has a high flammability when exposed to flames, thus when using an electric heater it's safer as no flame in this case is exposed to ethanol.

This part was about of how much marks? 2?

 

[Kiara P.]

Heats up more quickly and catching fire is same? If not then in total I've lost about more than 5 marks :/

I'm afraid they're not the same :/
As when you say heats up quickly you're referring to the liquid getting hotter not getting flammable nor catching fire.
But as you said now concentrate more at the moment at what's left and everything will be okay.

 

[Kiara P.]

This part was about of how much marks? 2?

I don't quite remember but i think it was like a 1 mark.

 

[NOneed2speedd]

This part was about of how much marks? 2?

It was 2 mark

 

[Kiara P.]

Oh...

 

[FAHAD imtiaz]

Okay now in total I've lost about 7-5 marks now ! What the answer of why iron electrodes are not used? I wrote because they are not inert and suitable wbu? :/

 

[FAHAD imtiaz]

*was

 

[FAHAD imtiaz]

At 53 or 50 A* or A is possible :/?

 

[Kiara P.]

Okay now in total I've lost about 7-5 marks now ! What the answer of why iron electrodes are not used? I wrote because they are not inert and suitable wbu? :/

Iron is REACTIVE so if used it would react with the electrolyte.

 

[FAHAD imtiaz]

Iron is REACTIVE so if used it would react with the electrolyte.

Iron is not suitable could gain marks?

 

[Kiara P.]

Iron is not suitable could gain marks?

Perhaps, Yes.

 

[FAHAD imtiaz]

:'(

 

[FAHAD imtiaz]

Perhaps, Yes.

Thanks at least a single answer is of match

 

[Kiara P.]

Thanks at least a single answer is of match

Anytime!

 

[Ushnaaa]

The correct ans was it bleaches litmus paper slowly but no effect is acceptable!

Are you sure that its acceptable?
Did you see this somewhere?
Source?Also majority of the answers are bleached litmus.

 

[Mr.Physics]

Are you sure that its acceptable?
Did you see this somewhere?
Source?Also majority of the answers are bleached litmus.

Well I didn't expect that CIE would ask us such an unpredictable question !! I never knew that Bromine can be tested by litmus coz i never read it anywhere ! And also this type of question came first time as there isn't any in past papers . It was of a single mark SO IT Won't affect ma grade if it gets wrong Inshallah . BTW what did you write for this question ??

 

[Muaaz Iqbal]

Congrat's to all those who wrote Bleached in Bromine Question

 

[Mr.Physics]

Congrat's to all those who wrote Bleached in Bromine Question
View attachment 53597

I think no effect will be correct !!