64 thoughts on “Answer Key CSIR NET Chemical Sciences June 2012”

  2. sir i am not able to download the answer key of csir-ugc net chemical science question paper june 2012. please mail this copy in my email id jh.shakeel@gmail.com.
    it ill be your st kindness.

  10. Question No: 119 .. The answer is 1 (not 4) . The number average molar mass and weight average molar mass are obtained by osmometry and light scattering measurements

  13. there are so many mistakes in ans key, for 141 option (4) is rite,for 136 option( 2) is rite,for119 option(1) is rite,and for 67 option (1),for 69 option( 3) rite not 2 , for 7 opt(2), plz tell me about my doubts email id is vishva0000@gmail.com

  19. oxidation state of iron in metal himoglobin fe+2 is correct

    71 question is strenth of E-O p pi and d pi (si, p,s,o)
    ans is si>o,p>o s>o, cl>o is correct (1)
    si-o bond enargy is 452 and cl-o bond enargy is 256

    • u r wrong …………
      bond strength depends upon M-O Pi back bonding……..as3d orbital size order si>p>s>Cl ,back bonding order should be reverse ……….so ans is 4 not 1

  20. 137 question simon smit reaction (1) is correct ans
    A:is ch2 I2 and B: is a me3s+I- NaH (me3s+ I- is strong methyalated agent than me3s=0 NaH)

    130. question is 1 correct ans

  22. ya kranthi u are right.first protection of keto group then adding tebbes reagent is the correct answer.answer is 1 only.

  23. thanks tirumal please send me 130 question is 1 is correct ans my expetation in photo chemistry ans 1 is final product of intermediat starting is a 3 ans but intermediat to final produt possible my expetation
    send me corrct ans
    71 question is the sterenth of ppi an d dpi (si,p,s,cl)
    my ans is 1 is correct ans but only strenth of ppi and dpi given question not back bong question not given

    tirumal ple see the 122 question correct ans sent me
    my expet ans is 2 may sharing chemistry for you my cell no.8374422530 ple your email id

  26. the answer given for q.no 136 by Dr.Uma Sharan Singh is 4 i think it is wrong it should be 2 actually the base will attack at the alpha carbon center which gives carbanion this carbanaion will not directly attack at C-Br bond via SN2 type reaction because here we have an allylic type of system and the C=C bond is anti periplanar to the sigma C-Br bond which will weakends the C-Br bond at first so the nuclephile should attack at the C=C center rather than C-Br center leads to give a cyclopropanone type of ring and it will be opened by the attack of base (-OMe) leading to give the product 2.

  30. 33 question the correct statement for aggregating nature of alkyle lithium (RLi) reagent is
    ans : The carbanion nucliophilicity increses with aggregation

    37.question least basic amomg the following is
    ans: Al(oH)3 Al is p blok elment ampoteric charector

  31. I am not able to open the chemical sciences question paper and answer key . Can u please mail it to me.

  33. 139 question see the Suzuki coupling (cross-coupling with boron reagents 1,2,3,4)
    Pd(PPh3)4 and K3PO4 Trans product is possible. not Cis

    Cis product is possible L4Pd, PhH
    NaOEt / EtOH

  35. Please sir send me aswer key csir net chemical science series [A]une 2012 On my mail add. Please……….

  36. Please sir send me aswer key csir net chemical science series [A] june 2012 On my mail add. Please……….

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