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Recent content by PixelsLevls

  1. PixelsLevls

    Chemistry: Post your doubts here!

    Does anyone remember the empirical formula of organic undergoing combustion? It was one of the earlier questions
  2. PixelsLevls

    Chemistry: Post your doubts here!

    Yeah, they asked how does the catalyst for acid reform. The catalyst is NO2. NO2 reacts with SO2 to form SO3. NO2 becomes NO in turn and is oxidized by the atmospheric oxygen back to NO2
  3. PixelsLevls

    Chemistry: Post your doubts here!

    It was the the number of unpaired electrons and the number of valence electrons.
  4. PixelsLevls

    Chemistry: Post your doubts here!

    The Uncertainty should be half of the smallest reading on your burette. So if the smallest reading is 0.1cm3, you uncertainty will +/- 0.05cm^3 So if you have a uncertainty of 0.15cm^3 then your smallest reading must've been 0.30cm^3! which is very unlikely. Hope this helped
  5. PixelsLevls

    Chemistry: Post your doubts here!

    There is definitely a reaction with Hydrogen Halides, and they are also acids. HCl reacts with Alkenes in gaseous state or mixed in water as a concentrated solution, which is basically hydrochloric acid. This is because the hydrogen will act as a electrophile, as it already has a slightly...
  6. PixelsLevls

    Chemistry: Post your doubts here!

    Phenol is very reactive because a lone pair from oxygen over laps with the delocalised pi system in the benzene ring. Usually for benzene to react with Bromine we require bromine as a pure liquid and a catalyst But with phenol an aqueous solution works! As it is more reactive and has a higher...
  7. PixelsLevls

    Physics: Post your doubts here!

    No bad idea, they are actually present as one whole question. It's fairly simple I suggest you go through it.
  8. PixelsLevls

    Physics: Post your doubts here!

    This is about your 2nd question first part (i) We have a lot of information in the question itself. We have been given a: Gold Nucleus Alpha Particle! Lets list the Data for Gold Nucleus: Charge : 79e Convert to coloumbs: 79 * (1.6 * 10^-19) Answer: 1.264 * 10^-17 Lets list Data for Alpha...
  9. PixelsLevls

    Physics: Post your doubts here!

    Hi gary I've drawn a relay in my recent reply to armeena Do exactly the same thing but don't forget the switch for the lamp
  10. PixelsLevls

    Physics: Post your doubts here!

    Here. The first diode is the rectifier diode. This will make sure your relay switches on only when there is a positive cycle of voltage. Now some Electromagnetism comes into picture. A relay is an electromagnet, if there is a current in the coil it will act as a magnet, but if there is a large...
  11. PixelsLevls

    Organic chemistry reactions. ALL REACTIONS! Pleaseeeeeeee - DESPERATE

    After 4 years :LOL: CN the cyanide is a good way adding a carbon in a hydrocarbon chain. So if you see cyanide, a carbon is present, so it is added to the chain, creating CH2NH2. I hope i haven't made any mistake. Thank you.
  12. PixelsLevls

    Physics: Good books for download

    Thank you these are great. Will be writing my as level exam soon. ^_^
  13. PixelsLevls

    Physics P1, P2 & P4 past papers chapter wise! :D

    Guys the Link is the password itself
  14. PixelsLevls

    Physics P1, P2 & P4 past papers chapter wise! :D

    There is no first post, absolutley nothing... what is the pass? can someone post a screenshot if not copy paste
  15. PixelsLevls

    *UPDATE *EDEXCEL MATHS ACTIVE BOOKS C1 C2 C3 C4 M1 M2 M3 M4 M5 S1 FP2 FP3 UPDATE:ALL BOOKS AVAILABLE

    Hi! The M1 textbook does not seem to available on server :(
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