Chemistry: Post your doubts here!

[Jane_Kim]

"Decolourising of pottasium magnate shows oxidation took place option A and D"... I don't get why...? Can you explain more on that?? Thank youuu!!

 

[Hamnah Zahoor]

"Decolourising of pottasium magnate shows oxidation took place option A and D"... I don't get why...? Can you explain more on that?? Thank youuu!!

Potassium magnate is an oxidizing agent it is originally purple in colour and on oxidizing it becomes colourless.
In option A the aldehyde will be oxidized to carboxylic acid thus Oxidation took place.
In option D on the right side of the compound there is also an aldehyde which oxidizes.

 

[Jane_Kim]

Hiiii this is from 2018 Feb March paper 12. The answer is A. Can anyone explain why...? Thanksssss!

 

[Hamnah Zahoor]

Hiiii this is from 2018 Feb March paper 12. The answer is A. Can anyone explain why...? Thanksssss!

 

[Jane_Kim]

Ohhh yes got it thank youuu

 

[Jane_Kim]

This question is from 2018 October November Paper 12. The answer is D. Can anyone help me with this? Thank you!

 

[Hamnah Zahoor]

This question is from 2018 October November Paper 12. The answer is D. Can anyone help me with this? Thank you!

 

[Jane_Kim]

Thank you so much I get it now!!

 

[Mistar-Kigi]

It's that time of the year again xD

 

[Hamnah Zahoor]

Thank you so much I get it now!!

You are welcome

 

[Mistar-Kigi]

Quick question : When writing an ionic equation from the list in the data booklet , we choose the ones which give us the most Potential difference , right?

 

[Jane_Kim]

Hi I have another question here. This is from MayJune 2018 paper 11. The answer is C... How do u solve this??

 

[Jane_Kim]

Quick question : When writing an ionic equation from the list in the data booklet , we choose the ones which give us the most Potential difference , right?

I'm not quite sure about it. Sorry...

 

[Mistar-Kigi]

I'm not quite sure about it. Sorry...

Hot concentrated KmnO4 causes rupture at the double bond. Thus, you break both the double bonds and form ketone and carboxylic acid (according to the arrangement). Also, do remember that CO2 is always produced during rupture.

I'm not the best when it comes to explaining so if it doesn't clear that up just reply and I'll try sending you a picture.



Edit : Methanioc acid would be a product too but since it's not mentioned we ignore it.

 

[Jane_Kim]

Hot concentrated KmnO4 causes rupture at the double bond. Thus, you break both the double bonds and form ketone and carboxylic acid (according to the arrangement). Also, do remember that CO2 is always produced during rupture.

I'm not the best when it comes to explaining so if it doesn't clear that up just reply and I'll try sending you a picture.



Edit : Methanioc acid would be a product too but since it's not mentioned we ignore it.

Sorry I still don't really get it... Can I see the picture?? Thank you so much!

 

[Mistar-Kigi]

Here you are

Sorry I still don't really get it... Can I see the picture?? Thank you so much!

I tried but it says that the file size is too big sorry ;-;

 

[Mistar-Kigi]

Quick question : When writing an ionic equation from the list in the data booklet , we choose the ones which give us the most Potential difference , right?

Also, is there literally anyone who can clear this up?

 

[Hamnah Zahoor]

Hi I have another question here. This is from MayJune 2018 paper 11. The answer is C... How do u solve this??

 

[Hamnah Zahoor]

Here you are

I tried but it says that the file size is too big sorry ;-;

Whenever it says file size too big just take a screenshot of the picture you want then post it.

 

[Mistar-Kigi]

Whenever it says file size too big just take a screenshot of the picture you want then post it.

Got it! thank you.

Can you please help me with my question though?