Chemistry: Post your doubts here!

[princess Anu]

 

[Farhad221]

Does anybody know where can i find A2 topical papers for chemistry and if someone has softcopy of them i will be really glad if you can upload them?

 

[Xaptor16]

https://www.xtremepapers.com/community/threads/as-chemistry-topical-finally-here.23520/
these are the ones i found, there's a link on that page to A2 topicals as well if you're looking for those

 

[Iris Dylan Lane]

View attachment 53962

The 13th one. Is it C?

 

[Farhad221]

t

https://www.xtremepapers.com/community/threads/as-chemistry-topical-finally-here.23520/
these are the ones i found, there's a link on that page to A2 topicals as well if you're looking for those

Thank you

 

[♣♠ Magnanimous ♣♠]

View attachment 53962

I think it's C
It ain't A coz Al2O3 is an "amphoteric oxide" and MgO is an "basic oxide" so it will not lead to neutralization reaction!

 

[♣♠ Magnanimous ♣♠]

View attachment 53962

Fully not sure but I think it may be like that ---->

Increasing temperature by 10 degree increases the energy of molecules no doubt but this results in effective collision between molecules leading to increase in rate of reaction

 

[princess Anu]

I think it's C
It ain't A coz Al2O3 is an "amphoteric oxide" and MgO is an "basic oxide" so it will not lead to neutralization reaction!

but won't they still form a salt & water leading to a Approximately NEUTRAL sol? because al2o3 wud behave as an acid?

 

[♣♠ Magnanimous ♣♠]

but won't they still form a salt & water leading to a Approximately NEUTRAL sol? because al2o3 wud behave as an acid?

Hmm yeah
RoOkaYya G help us!

 

[BhaiArshad]

View attachment 53962

Look at the origin:

 

[Metanoia]

I think it's C
It ain't A coz Al2O3 is an "amphoteric oxide" and MgO is an "basic oxide" so it will not lead to neutralization reaction!

Al2O3 is insoluble in water. MgO dissolves slightly in water to form an alkaline solution. That itself is not alkaline enough to react with Al2O3.

 

[Metanoia]

CCl2=CH-CH3
CHCl=CClCH3 (This can form a cis and trans isomer)
CH2=CClCH2
CH2=CHCHCl2

Two more
CHCl=CHCH2Cl (Cis-trans)

 

[♣♠ Magnanimous ♣♠]

Al2O3 is insoluble in water. MgO dissolves slightly in water to form an alkaline solution. That itself is not alkaline enough to react with Al2O3.

Thanks a lot =)
princess Anu

 

[princess Anu]

 

[princess Anu]

the answer is A
but I don't understand the fact that if all of the given compounds are formed in COMBINATION ( as stated by the question) v wud end up with a total of 12 carbons.. whereas octane has 8. So how will they form in a Combinaton? shouldn't it be B? because in combination the total number of C's shud be 8, no?

 

[princess Anu]

is there a difference between Oxidation Number & oxidation state?

 

[Metanoia]

the answer is A
but I don't understand the fact that if all of the given compounds are formed in COMBINATION ( as stated by the question) v wud end up with a total of 12 carbons.. whereas octane has 8. So how will they form in a Combinaton? shouldn't it be B? because in combination the total number of C's shud be 8, no?

Keep in mind we are not just cracking a single molecule. Countless molecules are being broken down. Any molecule that has less carbon than the original molecule is a possible product.

 

[♣♠ Magnanimous ♣♠]

Keep in mind we are not just cracking a single molecule. Countless molecules are being broken down. Any molecule that has less carbon than the original molecule is a possible product.

Can you elaborate please!

 

[Metanoia]

View attachment 54001

Under increased pressure, the total pressure of the system increases.

Although the mole faction of HI does not change, the partial pressure of HI increases as partial pressure = mole fraction X total pressure

 

[Metanoia]

Can you elaborate please!

Cracking of octene produces molecules that have less carbons than octene.

W, X, Y and Z are thus all possible products of cracking of octene.