Hi Dr Mona, your video really helped me when solving past papers. Just a question, in qs 3 (c) (ii) how did you know the order of the product, like how do you know it is HNCO, and not CONH or NHCO.. Is there a specific criteria I have to follow to know the exact order?
@DrMonaSeif4 ай бұрын
U have to arrange them according to how many bonds each atom can make . Ex, Carbon can make 4 bonds 2 with oxygen and 2 with nitrogen So carbon has to be in the middle between O and N
@maylight274 ай бұрын
When you say bonds, do you mean the valence electrons, going from highest to lowest?
@DrMonaSeif4 ай бұрын
I mean how many electrons are needed to complete it's outer shell to 8 electrons. And as for hydrogen only 2 electrons are needed for a complete outer shell.
@maylight274 ай бұрын
@@DrMonaSeif oh I kind of get it in now. Appreciate, thanks!
@mohannadmohamadhasseb7618 Жыл бұрын
Thank you soo much it really helps me ❤❤
@forgottenkitten812 жыл бұрын
Thank you sooo much for your efforts, the explanation is quite clear and fairly detailed.
@gamesause69492 жыл бұрын
Thank you this was really helpful
@raidm18384 ай бұрын
for Q6dii) the answer is just ethyl butanoate and butyl ethanoate in the mark scheme, is it ok if i write smth else like methyl pentanoate
@xdSloshy3 ай бұрын
Yes
@jomanaeldod3993 ай бұрын
I dont quite understand why did we choose a metal below iron in q4 bii
@aayan39393 ай бұрын
the bigger the gap between the two metals in the reactivity series, the more voltage is obtained
@georgereda19332 жыл бұрын
where can I find question paper?
@DrMonaSeif2 жыл бұрын
Write ur email, and I will send it to you.
@yumna7717 Жыл бұрын
i didn't get Q4 part e{ii}
@DrMonaSeif Жыл бұрын
In case of electrolysis of molten NaCl we only have Na +ions And Cl- ions So Sodium metal will discharge at the cathode and chlorine gas will discharge at the anode And the electrolyte is used up . So sodium metal is the different substance formed in case of molten NaCl
@yumna7717 Жыл бұрын
@@DrMonaSeif sodium is different because it is a metal and chlorine is a gas?
@DrMonaSeif Жыл бұрын
It is the different product formed In case of molten NaCl only But Cl2 gas is formed in both cases (Molten and concentrated NaCl solution)
@yumna7717 Жыл бұрын
@@DrMonaSeif Ohhhh now i get it thank youuu!!! :)))
@maylight274 ай бұрын
Hi Dr. Mona! Thanks for the video, it really helped. I would really appreciate if you could explain how you know the product in question 3 (c)(ii) is HNCO and not, basically how did you know the order of the compound? Thanks
@aishathmusthageema49552 жыл бұрын
Where can I get this paper pdf?
@DrMonaSeif2 жыл бұрын
Contact me on WhatsApp 00971/ 523287956 I will send it to you