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  1. A

    ChemP22 a question

    we only heated it strongly... passed it thru a catalyst which turned black.. no sense of carbon formation i think :s
  2. A

    ChemP22 a question

    ANd the catalyst couldnt be sulfuric acid.. it was a solid :/
  3. A

    ChemP22 a question

    OMG no.. how can combustion take place.. combustion hoti to propene kahan se banti ???
  4. A

    CHEMISTRY 22. HOW IS IT??

    I have seen somewhere in marking scheme,.. thy mark even the aldehyde correct.. anyways U only had to write the organic product not co2 and h20
  5. A

    ChemP22 a question

    Well i am confused on that one... I read it somewheree that it was copper cuz copper(ii)oxide is black.. I am confused as to how carbon could form when we were not combusitng the alcohol :/
  6. A

    CHEM PAPER-22

    lol ! i was calm enuff :P ! and i have left it too ..It wasnt worth this much discussion :o
  7. A

    CHEM PAPER-22

    Umm i am fine with my answers :P !!! Let the examiners decide :D
  8. A

    CHEM PAPER-22

    I dnt have the question.. but my teacher confirmed it too .. abt CuO
  9. A

    CHEM PAPER-22

    hmm yes it can be.. i also wrote that then crossed out.. !! but SiO2 is used to make alcohal from alkene not alkene frm alcohol :/
  10. A

    CHEM PAPER-22

    It said "THE SOLID X TURNED BLACK" not "SOMETHING BLACK DEPOSITED ON SOLID X"
  11. A

    CHEM PAPER-22

    I have checked it on net.. !!! If carbon had to be formed it wouldnt form midway !!! It was cooper turned to copper(ii)oxide on reaction with air !
  12. A

    CHEMISTRY 22. HOW IS IT??

    Yap it was C3H6O2. same Mr:74 ! Nah.. Only aldehyde was a product of oxidation with Hot conc.KMnO4.. U could write either an aldehyde or carboxylic acid.. u will get the marks !
  13. A

    CHEMISTRY 22. HOW IS IT??

    SiO2 doesnt conduct elektricity !
  14. A

    CHEM PAPER-22

    Polymerization condition : Presecnce of a double bond !
  15. A

    CHEM PAPER-22

    And u dint have to write pumice .. U had to name the compound which was AL2O3
  16. A

    CHEM PAPER-22

    Well it could be either acid or NaoH.. !!! they said specify a NECESSARY REAGENT (not reagents) for the hydrolysis..
  17. A

    CHEM PAPER-22

    And it just wasnt carbon... Lol How can it be carbon.. it was a catalyst.. If carbon had to be deposited it should have been deposited at eh bottom of the tube where the alcohol was not the middle.. it couldnt be H2SO4. it was a solid It couldnt be Al2O3 because it dosnt go further reaction...
  18. A

    CHEM PAPER-22

    OK guyz... !!! The black solid was COPPER(ii)OXIDE for sure !!!! Copper reacts with air to give black CuO and i am damn sure about this one !! :D
  19. A

    please anyone who finishes the exam post chem p2 questions?

    Re: please anyone who finishes the exam post chem p2 questio OmG u got 15 hrs.. !!! No sharing then and no discussing !
  20. A

    This is why should never work on Predictions

    DITTO !!! I have been posting the same thing in all the topic regarding guess papers...Good that u made this TOPIC.. Studying along guesspaper guidelines is pure stupidity.. Paper was easy otw it wud have been a bad day for those who relied on guesspapers !! P.S: The Paper was waaaaaayyyyyy...
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