Search results

  1. O

    Need key book/solution book for Pure Mathematics.

    Bro, I visited the link but there is not the new edition that I am looking for.
  2. O

    all cie full textbooks available in pdf format

    Could anybody please upload the following books in pdf : 1. Cambridge International AS & A Level Mathematics: Probability & Statistics 2 COURSEBOOK 2. Cambridge International AS & A Level Mathematics: Mechanics WORKED SOLUTIONS MANUAL Thank you in advance.
  3. O

    Need key book/solution book for Pure Mathematics.

    Could anybody please upload the following books in pdf : 1. Cambridge International AS & A Level Mathematics: Probability & Statistics 2 COURSEBOOK 2. Cambridge International AS & A Level Mathematics: Mechanics WORKED SOLUTIONS MANUAL Thank you in advance.
  4. O

    all cie full textbooks available in pdf format

    Does anybody have CIE Pure Mats 1 Coursebook?
  5. O

    Need key book/solution book for Pure Mathematics.

    I also need it. please upload if anybody has. Thank you.
  6. O

    Maths Notes (P1, P2, M1, M2 and S1)

    P1: http://www.sendspace.com/file/3sgv9o P2: P3 http://www.mathsrevision.net/alevel/pure/ http://studyguide.pk/?page_id=116 M1: http://www.mathsrevision.net/alevel/mechanics/index.php http://www.sendspace.com/file/h1l7qb (this one is very good) M2: S1: I am really sorry to inform you...
  7. O

    Save My Exams classified Answers (FREE)

    Can you send me CIE O Level Physics, Chemistry and Biology answers please fro Paper 1, 2, 4 for Physics and chemistry and Paper 1, 2, 6 for Biology My email: [email protected]
  8. O

    Edexcel IGCSE | IAL January 2017 Question Papers

    Can anybody give me Edexcel IGCSE and IAL January 2019 Question Papers and Mark Schemes?
  9. O

    Chemistry, Physics, Biology: Post your doubts here!

    Thank you for your reply. Firstly, why LiAlH4 behaves like this? Secondly, what's the difference between its mode of action and that of NaBH4?
  10. O

    Chemistry, Physics, Biology: Post your doubts here!

    Can LiAlH4 reduce both C=O and C=C? Why or why not? Can you please explain? Thank you in advance.
  11. O

    Chemistry: Post your doubts here!

    Can you please send me the notes? Thank you in advance.
  12. O

    Chemistry: Post your doubts here!

    -------------------------------------------------------------------------------------------------------------------- I think there is a mistake in the above answer: The total volume will be 0.035 L (0.02 L + 0.015 L) Concentration of H+ = 0.0010/0.035 = 0.02857 M pH = -log (0.02857) = 1.54 (Ans)
  13. O

    Chemistry: Post your doubts here!

    n(KOH) = 0.001 mol; n(CH3COOH)=0.01025 mol. They react in 1:1 ratio, so after neutralisation moles of ethanoic acid left = 0.01025 - 0.001=0.00925 mol. So [ethanoic acid] = 1000*0.00925/35 = 0.2643 mol/dm3. After reaction, moles of CH3COOK produced is 0.001 mol. So [CH3COOK] = 1000*0.001/35 =...
  14. O

    Chemistry: Post your doubts here!

    9701/41/M/J/17 Q6(d)(i) In the Proton NMR spectrum of 1-phenyl-ethan-1-ol, C6H5CH(OH)CH3 would the -CH- have a peak at 2.7 ppm or at 4.1 ppm? In this compound -CH- is bonded to an aromatic ring at one end and to an electronegative O atom at the other end. So if -CH- is considered as an alkyl...
  15. O

    Chemistry: Post your doubts here!

    In the nucleophilic addition of HCN to C=O, what should be the conditions and reagents? For the reagents, should we write NaCN and dilute H2SO4 or should we write HCN + NaCN as written in the mark scheme of 9701/42/M/J/17 Q8 (a)(iii) Step-2?
  16. O

    Chemistry: Post your doubts here!

    9701/42/M/J/17 Q3(b)(iii) Calculate the number of moles of RCO2H that produced the SO2 and HCl. In neutralising SO2 with NaOH, two moles of NaOH were needed for each mole of SO2. So should it affect the mole ratio of RCO2H : NaOH when calculating the number of moles of RCO2H that produced the...
  17. O

    February March 2019 papers

    Can you please give me Chemistry P4 and P5?
Top