- Messages
- 415
- Reaction score
- 252
- Points
- 53
Yaar I am not sure about 27. I mean i get confused between C and D.
Let me work it out and then i'll tell you too
help plz
We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
Click here to Donate Now (View Announcement)
Yaar I am not sure about 27. I mean i get confused between C and D.
Let me work it out and then i'll tell you too
help plz
which paper is this from?
The question says that there are 0.02 moles of Al not Al2O3.Can someone explain this to me? I have done all the calculation but answer is coming different.
Summer 2011, Variant 13, Q12.
My calculation
Al2O3 + 6HCl = 2AlCl3 + 3H20
As 1 mol of Al2O3 reacts with 6 mol of HCl, 0.02 mol react with 0.12 mol.
0.12/2= 0.06 dm3 of HCl 60 cm3. Whats wrong with this?
View attachment 28685
The question says that there are 0.02 moles of Al not Al2O3.
My calculation:
4Al+3O2--->2Al2O3
AL2O3+6HCl---->2AlCl3
Since 4 moles of Al is equal to 2 moles of Al2O3, 0.02 moles of Al will be equal to 0.01 mole of Al2O3.
According to equation,
Moleos of HCl=6xmoles of Al2O3
i.e moles of Hcl=0.06.
since conc=mol/vol,
vol=mole/conc
=0.06/2=0.03 dm^3= 30 cm^3
The answer is C.
For Q.9:mj 2007 q. 34 & 9
For Q.9:
For reaction 1:
Kc=[X2Y]^2/[X2]^2[Y2]
for reaction 2:
Kc={[X2][Y2]^1/2}/[X2Y]
=1/[{(X2Y)^2/(X2)^2(Y2)}
the answer is A when you work it out further.
Thanks!The question says that there are 0.02 moles of Al not Al2O3.
My calculation:
4Al+3O2--->2Al2O3
AL2O3+6HCl---->2AlCl3
Since 4 moles of Al is equal to 2 moles of Al2O3, 0.02 moles of Al will be equal to 0.01 mole of Al2O3.
According to equation,
Moleos of HCl=6xmoles of Al2O3
i.e moles of Hcl=0.06.
since conc=mol/vol,
vol=mole/conc
=0.06/2=0.03 dm^3= 30 cm^3
The answer is C.
In which species does the underlined atom have an incomplete outer shell?
A Al 2Cl 6 B CH3+
C Cl 2O D H2Cl C•
thnx..ques 27 also?
Yaar I am not sure about 27. I mean i get confused between C and D.
Let me work it out and then i'll tell you too
I think it has something to do with tertiary alcohal....there is possibility of tertiary alcohal in D which cannot be oxidised
agreedsince the C:H ratio is high, we can predict that benzene is present.
Since it is not readily oxidised by mild oxidising agents, we say that it is a tertiary alcohol. draw the structures and the only compound which produced by the dehydration of X is D.
Can you plz mention the year and the question no plz!
1 cannot be as molecules have to join. The molecules can join in any fashion so it can be any number less than 1.
For almost 10 years, the site XtremePapers has been trying very hard to serve its users.
However, we are now struggling to cover its operational costs due to unforeseen circumstances. If we helped you in any way, kindly contribute and be the part of this effort. No act of kindness, no matter how small, is ever wasted.
Click here to Donate Now