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Chemistry: Post your doubts here!

A

awesomaholic101

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Sinzzzz said:
heyy!
can someone explain this please
Alkane X has molecular formula C4H10. X reacts with Cl 2(g) in the presence of sunlight to produce only two different monochloroalkanes, C4H9Cl. Both of these monochloroalkanes produce the same alkene Y, and no other organic products, when they are treated with hot ethanolic KOH. What is produced when Y is treated with hot concentrated acidified KMnO4?
A CO2 and CH3CH2CO2H
B CO2 and CH3COCH3
C HCO2H and CH3COCH3
D CH3CO2H only
The answer is B, why not A?
Click to expand...
The chloroalkenes formed will have 2 methyl branches, only then alkenes formed by both isomers will be same.
 
The Sarcastic Retard

The Sarcastic Retard

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Sinzzzz said:
heyy!
can someone explain this please
Alkane X has molecular formula C4H10. X reacts with Cl 2(g) in the presence of sunlight to produce only two different monochloroalkanes, C4H9Cl. Both of these monochloroalkanes produce the same alkene Y, and no other organic products, when they are treated with hot ethanolic KOH. What is produced when Y is treated with hot concentrated acidified KMnO4?
A CO2 and CH3CH2CO2H
B CO2 and CH3COCH3
C HCO2H and CH3COCH3
D CH3CO2H only
The answer is B, why not A?
Click to expand...
THere are two posiblities of forming alkenes in primary Halogenoalkane.
There is only one posiblity of forming alkene in tertiary.
Hence:
WIN_20151104_20_05_02_Pro.jpg
 
The Sarcastic Retard

The Sarcastic Retard

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donewithtime80 said:
Can u please explain your working? It's going over my head :p
Click to expand...
I used trial and error.
I tried option A, didnt satisfied the answer, but B did. Sth like this;
Initial moles of 2P : 2
IM of 2Q and R : 0
Equilibrium moles of R : x
EM of 2Q is x/2 (1:2 ratio)
EM of 2P is 2 - x/2 (1:2 ratio and IM was 2 so we will subtrct x/2)
So addition of EM = 2 - x/2 + x/2 + x = 2 + x
 
D

donewithtime80

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The Sarcastic Retard said:
I used trial and error.
I tried option A, didnt satisfied the answer, but B did. Sth like this;
Initial moles of 2P : 2
IM of 2Q and R : 0
Equilibrium moles of R : x
EM of 2Q is x/2 (1:2 ratio)
EM of 2P is 2 - x/2 (1:2 ratio and IM was 2 so we will subtrct x/2)
So addition of EM = 2 - x/2 + x/2 + x = 2 + x
Click to expand...
kayy!! thanks bro!
 
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