Chemistry: Post your doubts here!

[Metanoia]

Ok Last hours left
Can anyone tell me what to study now
I am confused :/

The most sensible thing to do for the last few hours is to get decent sleep for the brain to process infomation, rather than forgo sleep to cram more stuff.

 

[♣♠ Magnanimous ♣♠]

As level is too easy to study. i ahev four papers printed. i haven't done any of them until now.

than do it na!

 

[♣♠ Magnanimous ♣♠]

The most sensible thing to do for the last few hours is to get decent sleep for the brain to process infomation, rather than forgo sleep to cram more stuff.

but what if you don't know anything in paper? if you study some pages of books it would be more sensible than this suggestion sir

 

[RHB :3]

Yeah but but still have some tome before going to bed
sao what to revise?

 

[♣♠ Magnanimous ♣♠]

Yeah but but still have some tome before going to bed
sao what to revise?

first clear your concepts from book in simpler way it would be better if you read selected chapters like 10 , 11 , 8 . 7 and enthalpy and if time is left than also do organic part

 

[MYLORD]

Moles of H2=0.5
Atoms in one mole=2*0.5*6.02*10^23 (No need to multiply 6.02*10^23 i every step as it is same, just find the ratio)
So here atoms=1

A: 0.5*3=1.5
B: 0.5*5=2.5
C: 1*1=1
D: 1/6*3=0.5

So C has same no of atoms.

thnx bro

 

[Suchal Riaz]

than do it na!

the rate of solving queries is less than the rate of new queries :/

 

[ZaqZainab]

the double bond can form between the carbon on which OH is atached and any adjacent carbon.
in (a) and (d) only one product as there is only one adjacent carbon to carbon on which OH is attached
in (b) if the double bond is formed between the 3rd and 2nd carbon then it will have 2 cis-trnas isomers. total 3 products.
in (c) again one product because both products will be same as the molecule is symetrical.

can you answer 39 of that paper too
i dont understand how 2 is wrong

 

[Suchal Riaz]

okay guys see you after 2 hours. now i think i should study something myself. try the presentations of magnanimous for quick revision they are really good. please attach them here vishal

 

[Metanoia]

but what if you don't know anything in paper? if you study some pages of books it would be more sensible than this suggestion sir

Study a few of those commonly asked questions, yes. But not at the expense of sacrificing sleep before the exam day.

Rather have proper sleep and remember 50%, then cramp info and forgo sleep and just retain 20%.

 

[♣♠ Magnanimous ♣♠]

Study a few of those commonly asked questions, yes. But not at the expense of sacrificing sleep before the exam day.

Rather have proper sleep and remember 50%, then cramp info and forgo sleep and just retain 20%.

yeah! minimum 6 hours sleep is imp otherwise our biological clock will be disturbed

 

[♣♠ Magnanimous ♣♠]

okay guys see you after 2 hours. now i think i should study something myself. try the presentations of magnanimous for quick revision they are really good. please attach them here vishal

well okay! as you wish my bro
here are the BEST presentation ever from me ====> https://www.xtremepapers.com/community/threads/some-presentations-on-chemistry-of-as-level.31602/ do check and if it is helpful than do like it

 

[Metanoia]

can you answer 39 of that paper too
i dont understand how 2 is wrong

For dehydration, lets say you remove 1 OH, where do you think you can get the other H from?

 

[Suchal Riaz]

yeah! minimum 6 hours sleep is imp otherwise our biological clock will be disturbed

i never slept more than 4 hours in papers. and it's my third session of CIEs

 

[♣♠ Magnanimous ♣♠]

i never slept more than 4 hours in papers. and it's my third session of CIEs

lol what? but i think 4 hours is not good for our health bro!!!

 

[Metanoia]

How do we solve this?

You can visualise that C loses 4 electrons and N gains 1 electron.

So you need 4 moles of N to react with 1 mole of C.

 

[kingo44]

What will react differently with the two isomeric alcohols, (CH3)3CCH2OH and
(CH3)2CHCH2CH2OH?
A acidified aqueous potassium manganate(VII)
B concentrated sulfuric acid
C phosphorus pentachloride
D sodium

 

[ZaqZainab]

lol what? but i think 4 hours is not good for our health bro!!!

i don't sleep before a paper not even an hour like today night no sleep

 

[kingo44]

ok how alcohol 2 has larger electron cloudso detachment of h+ ion is easier explain please

 

[Metanoia]

ok how alcohol 2 has larger electron cloudso detachment of h+ ion is easier explain please

Can't understand your question? Are you asking why secondary alcohol is more acidic?