So how was chemistry P12 today?

[Snowysangel]

One had hydrogen bonding other had van-der Waals forces so would the hydrogen bond one be more viscous
That was the last statement

According to the Internet hydrogen bonding does affect viscosity

 

[Omar Haider]

I guess some people put 315 for the bond energy because in the Data booklet, the value of the C-C bond is 350, and because of energy losses the bond energy would probably decrease too.

 

[Kamihus]

What did you guys put for the Ag+ and Nh3 question? I put A (all three options) and for the PVC one I put the bacteria and fungi option.

Ag and NH3 I did D it was either A or B I think
And PVC one I did ethene would not be formed

 

[Afzal1]

Ag and NH3 I did D it was either A or B I think
And PVC one I did ethene would not be formed

the Pvc one was A bcoz the option was that bacteria and fungi cannot decompose it since it is non - bio degradable

 

[Kamihus]

The catalyst one statement 3 was wrong catalyst does not increase average kinetic energy of particles, right?

 

[Snowysangel]

Ag and NH3 I did D it was either A or B I think
And PVC one I did ethene would not be formed

It was D cause option 2 said that nh3 acts as a base but it doesn't cause the final product is Ag(NH3)2 and it hasn't accepted a proton

 

[Kamihus]

the Pvc one was A bcoz the option was that bacteria and fungi cannot decompose it since it is non - bio degradable

So how would ethene be formed in it?

 

[Princess Raven]

I think the PVC one was a repeated question not sure though.. And the ag one was D coz nh3 doesn't act as a base

 

[Kamihus]

Also section B catalytic converter one D was right I think it was repeated like increase the speed and more reduce would be wrong

 

[Kamihus]

I think the PVC one was a repeated question not sure though.. And the ag one was D coz nh3 doesn't act as a base

Yeah now I get how ethene would also be formed and answer was A

 

[Princess Raven]

The catalyst one statement 3 was wrong catalyst does not increase average kinetic energy of particles, right?

Ya 3 was wrong what were the other 2 options and the one that will be oxidized into carboxylic acid was 3-methyl-hex something

 

[Princess Raven]

Which ans is A?

Yeah now I get how ethene would also be formed and answer was A

 

[Kamihus]

Ya 3 was wrong what were the other 2 options and the one that will be oxidized into carboxylic acid was 3-methyl-hex something

Dont remember the first two but they were correct I'm sure
which one was it the one in butanal would be oxidised?

 

[Kamihus]

Which ans is A?

Will not be decomposed by bacteria and fungi

 

[Omar Haider]

I see, and which organic compounds cannot be dehydrated? I picked Ch3OH and the tertiary alcohol. you guys?

 

[Kamihus]

I see, and which organic compounds cannot be dehydrated? I picked Ch3OH and the tertiary alcohol. you guys?

Correct

 

[Snowysangel]

Will not be decomposed by bacteria and fungi

What question was that? The one which asked which of the following effects of burning hydrocarbons does not have a handful effect on the environment?

 

[Snowysangel]

I see, and which organic compounds cannot be dehydrated? I picked Ch3OH and the tertiary alcohol. you guys?

Can't tertiary alcohols be dehydrated?! The carbon would be able to firm a double bond with any if the three alkyl groups...no? All my answers are different from everyone else's here :/

 

[Kamihus]

What question was that? The one which asked which of the following effects of burning hydrocarbons does not have a handful effect on the environment?

Which of these statement is wrong about PVC
Decomposed by bacteria and fungi
Decomposed by sunlight
Ethene produced when broken
HCl or something like this produced when broken

Can't tertiary alcohols be dehydrated?! The carbon would be able to firm a double bond with any if the three alkyl groups...no? All my answers are different from everyone else's here :/

Well I think you're actually right. Tertiary alcohols cannot be oxidised and dehydration needs any neighbouring carbon to have an H atom attached to it. Or was it not a tertiary alcohol and something which actually cannot be?

 

[Snowysangel]

Which of these statement is wrong about PVC
Decomposed by bacteria and fungi
Decomposed by sunlight
Ethene produced when broken
HCl or something like this produced when broken

Well I think you're actually right. Tertiary alcohols cannot be oxidised and dehydration needs any neighbouring carbon to have an H atom attached to it. Or was it not a tertiary alcohol and something which actually cannot be?

Was that the question? :/ I got 4 answers wrong so far and in p2, I got the whole of the last question wrong cause I forgot that hot conc kmno4 breaks the double bond, so if there's no ECF, I lost 12 marks in one question