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  1. X

    Chemistry Paper 4-theory- doubts =D

    If its not answer yet here you go: Bismillah! the point to know is it denatures the enzyme in acidic condidion enzyme get Nh3+ ions in alkaline Condition enzyme get COO- ions
  2. X

    Chemistry Paper 4-theory- doubts =D

    no i mentioned the compoundss which it can be use for also for app just go through the text book or post it here specific issue/concept and i'll try to help!!
  3. X

    Chemistry Paper 4-theory- doubts =D

    If u are asking about G2 Solubility trend: it decreases down the group due to two factors: a)solubility inc as hydration inc as hydration gives out energy good for breaking lattic down the group hydration decreases as G2 elements form weak water bonds! means less energy available now for lattice...
  4. X

    Chemistry Paper 4-theory- doubts =D

    get specific what u want specifically maybe i can help !
  5. X

    Chemistry Paper 4-theory- doubts =D

    yup thats the case just u need to balance it!
  6. X

    Chemistry: Post your doubts here!

    sorry but colorimetry is different its used to identify the intensity of light being absorbed and emitted when measuring the Rate of Reaction when increasing concentrations!! I can help further if you like too!
  7. X

    Chemistry Paper 4-theory- doubts =D

    we well i was thinking the same but in ms hums are without those products
  8. X

    Chemistry Paper 4-theory- doubts =D

    no no bahi its not ChI3 which is attatched ChI3 is the side product giving yellow ppt the products are: NaI3 + h20 + ChI3 + (C6H5Oh)-COONa+ its TriIodo methane test: u warm the X Compound with NaOh and I2 X compound can only be following a) Ethanol b) all secondry alcohols c) only aldehyde...
  9. X

    Chemistry Paper 4-theory- doubts =D

    lol dont say sorry overload the questions on me:P i would love that look due to other functional groups the 2 4 (and 6) position of ring is activated so u don't need any further reagants to Bromonize rings
  10. X

    Chemistry Paper 4-theory- doubts =D

    It decreases down the group!! LD(lattice dissociation) decreases down the group (good for solubility) hyd(hyd) dec down the group(bond length inc) bad for solubility hydration factors dominates the Lattice dissociation factor hence solubility decreases down the group!!
  11. X

    Chemistry Paper 4-theory- doubts =D

    MashAllah !! lol ph=(-log([conc ofH+ or OH-]) ksp= solubility product = [product A][Product B] For Buffers pH= pka + log([salt]/[acid]) --> its same as finding normal pH but a more simpilified term pka= -log(Ka) for ka: HA <=> H+ + A+ ka= [H+][A+]/[HA] @ eqilibrium [H+]=[A+] so u figure out rest...
  12. X

    Chemistry Paper 4-theory- doubts =D

    yup yup Exactly, feel prety shy to collide :P Tips: study Environmental chemistry, Analytical Chemistry and Design and Material :P
  13. X

    Chemistry Paper 4-theory- doubts =D

    4 marks for each example 1 mark for example 1 mark for telling which type of catalysis it is 1 mark for reaction equation 1 mark for what Cat is doing (except meeeow :P ) u got the first three i hope so for the last mark in both example: a(Iron here is used as increasing the surface area where...
  14. X

    Chemistry Paper 4-theory- doubts =D

    well i did! :P its like the same reaction as with alkene with nickel above 160 - 200*C 70-80 atm Benzene blows offff now it turns to cyclohexane ==> c6H12
  15. X

    Chemistry Paper 4-theory- doubts =D

    one Haber Process Reaction Heteregenous Catalysis example(Fe is used as adsorption ) other one is for Sulfide and iodide reaction (fe used for Redox reaction in a same state)
  16. X

    Chemistry Paper 4-theory- doubts =D

    aren't they getting converted in 4H+ one equation ??
  17. X

    Mathematics: Post your doubts here!

    Q10 iii working with little explanation plz, anyone! http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_s12_qp_32.pdf
  18. X

    Chemistry Paper 4-theory- doubts =D

    Q1b1 i used MnO4- + 4h+ +3e ... equation and in ms it uses 8H equation how to know what to use ?? anyone plz! http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w12_qp_42.pdf...
  19. X

    Mathematics: Post your doubts here!

    https://docs.google.com/file/d/0Bzq5n8R79M6_bEFMLWFERFBVdW8/edit?usp=sharing Check this up what i meant!!
  20. X

    Mathematics: Post your doubts here!

    Thanks lol its not messy but neither the Q10 of w12 31 :) but thanks again
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