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  1. W

    AS Physics - Doubts eh?

    This should help u...........page 4 and 5
  2. W

    chemical bonding concept urgent help required

    Sorry about the other concept but i think u are right.......Sorry....:( I made the changes in my post above....:/
  3. W

    chemical bonding concept urgent help required

    It is not the bonds that are responsible coz for e.g......when you heat I2 it vaporizes right....???? When you are supplying heat you are only overcoming the intermolecular forces not breaking the covalent bond.........The I-I bond will still be there in the gaseous state(it wont...
  4. W

    AS Chemistry Doubts

    X2H6 has a one X-X bond and 6 X-H bonds.The eqn given above is thatenthalpy change of formation meaning all these bonds were formed.......The energy released during bond formation is equal in magnitude but with a negative sign to the bond energy(coz its exothermic).........So we have 2775 = 6...
  5. W

    AS Chemistry Doubts

    bcoz deltaH=Enthlpy of Products - Enthalpy of Reactants.................As the enthalpy of (Y+Z) is less than (W+X) so the answer is bound to come +ve.....:)
  6. W

    chemical bonding concept urgent help required

    Well u are juggling too many concepts simultaneously...... Lets handle them one by one...... 1.Shorter the bond,the stronger it is....(Correct) 2.bond energy is directly propotional to bond strength.........(your reasoning is correct) 3.bond strength is indeed inversely propotional to bond...
  7. W

    AS Chemistry Doubts

    The answer is 8........... In order to identify the no of cistrans isomers u need to first identify the stereocentres.If a compound has a C-C double bond and each of the C in the double bond is bonded to seperate groups then the compound has a stereocentre.In the above case there are 3 such...
  8. W

    AS and A Level Physics Coursebook [CD-ROM] (download)

    the password is vicboss............
  9. W

    I used to score As in my skul mostly.I messed up my chem atp but still got an a*(guess coz the...

    I used to score As in my skul mostly.I messed up my chem atp but still got an a*(guess coz the weightage was low) .why do u ask?
  10. W

    I gave them last year......got A*s in all........Thank God!!!

    I gave them last year......got A*s in all........Thank God!!!
  11. W

    AS and A Level Physics Coursebook [CD-ROM] (download)

    Thank u......boss!!!!(y)
  12. W

    Chemistry: Post your doubts here!

    i dont get why we use excess air when converting SO2 to SO3 in the contact process......i know it shifts the equilibirium shifts to the right but i dont get why...??????:confused:
  13. W

    Anyone Appearin' for AS Level ??

    Yeah.......there should be a separate threads for As and A2s........it gets too confusing otherwise.....good work fasih58(y) I got chem,phy,computing and math(p1 and s1) this session............hope the papers go well for all of us.....;)
  14. W

    A* ............. CALCULATIONS

    Well it aint necessary that 2 As make up an A*. Last year I got two As in both components of Pakstds still they didnt make an A* overall..... :x
  15. W

    Subjects for A Levels... Need good advice...

    Well Usman the same case is with me......... So anybody plz help.
  16. W

    A levels subjects??

    Well you dont require Chem for software engineering. It wont come in handy...... However you can only drop Chemistry if you wanna go abroad and study. I dont think in Pak youll be able to get into engineering without Chem.Many of my friends who wanna do SE have dropped Chem from their list. Keep...
  17. W

    Add Maths Paper 22 Discussion

    Thnx guyz even if i get 3 outta 6 Im happy...... I deserved none for making such a stupid mistake.... :oops:
  18. W

    Add Maths Paper 22 Discussion

    Well guys plz answer this query... How many marks is the examiner gonna deduct in a 6mark qst if u copied the qst wrong.. I misinterpreted 16 as a 6 therefore all my answers are coming wrong. HOwever if it had been a 6 then my answers are correcet.Am I going to losse all marks?
  19. W

    Add maths paper 1 discussion.

    Well I diffrenciated wrong in the 1st step in the either qst. Cant hope for more than 5 outa 10 in it... Why is it that the only qst dnt check turns out to be wrong??????Happenned in Maths, Phy also :x :no: Rest paperer was easy
  20. W

    Chemistry P2 :)

    Well ure right there... I replaced two H with Cl in the butane atom.
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