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How? can you please elaborate..
Oxidation of the third one produces two compounds.
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Oxidation of the third one produces two compounds.
In the third compound, there is a lenghty carbon chain and a primary alcohol (they are attached)
Now when CH3CH2(CH3)CH2- is oxidised, a ketone is formed and when a primary alcohol is oxidised, a carboxilic acid is formed.
Therefore, oxidation(gain of oxygen) breaks this compound into two compounds.
First question
The answer, as the mark scheme says, is B. I chose A and got it wrong..Can anybody kindly explain a bit about that please!!!
The Second one
Could anybody explain how to decide the bond angle in this case? D can be ruled out because N has lone pairs, but for the remaining three , I feel hard.
The third, most important one
Answer is A. What@!? HSO3- act as a base in the second reactoin???? I feel just totally baffled...
OK, the last one, thanks guys for being so patient
The answer is A... But I feel D seems to be more correct. Potassium forms covalent bonding in most cases, thus it should show the greatest tendency... Not sure if I have misunderstood the question however.
Thanks so much! Though I still don't quiet understand what's meant by SP^2 and why it's 120 degree. Anyway I will find out.Thanks1st one -_- too lazy to read all tht sorry :S
2nd one is : the nitrogen, having a double bond to the adjacent carbon and a single bond to the methyl group, is sp^2 hybridized and, therefore, the C-N-C bond angle would be 120°.
3rd one : the HNO3 - acts as a base as it neutralises the H+ (acidic)
4th one : its aluminium since its cation is Al3+ it has 3 electrons free to make covalent bonds unlike Mg2+ Ne (noble gas) K+
rexsun
quite*Thanks so much! Though I still don't quiet understand what's meant by SP^2 and why it's 120 degree. Anyway I will find out.Thanks
I just reviewed my notes and you're right.Yes please..
Amine group is C-NH2,http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s06_qp_4.pdf
q 5 c.....hw is it amine...........
thanxx............
cn u pls show hw to do q2 c iii.....
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s12_qp_42.pdf
Reaction 1 is decomposition and decomposition reactions are always endothermic. That heating upto 1000 degrees Celcius was an absolute hint too.Why is the answer to this B and not A?
Reaction 1 is decomposition and decomposition reactions are always endothermic. That heating upto 1000 degrees Celcius was an absolute hint too.
Reaction 2 involves braking of a lattice and formation of Ca-OH bonds. 'If you use a data booklet, you will see that enthalpy of -OH ion is less than the enthalpy of -O'.
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