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Debanjana Adhikari posted an Question
May 15, 2020 • 18:49 pm 30 points
  • CSIR NET
  • Physical Sciences

1.11. a sample of ordinary hydrogen (ih) gas in a discharge tube was seen to emit the usual balmar spectrum. on careful examina- tion, however, it was found tha

1.11. A sample of ordinary hydrogen (iH) gas in a discharge tube was seen to emit the usual Balmar spectrum. On careful examina- tion, however, it was found that the H. line in the spectrum was spit into two fine lines, one an intense line at 656.28 nm, and the other a faint line at 656.04 nm. From this, one can conclude that jahir.iitb@gmail.com physicsguide.in/net Sk Jahiruddin Atomic Molecular: June 2020 the gas sample had a small impurity of [TIFR 2015] (a) H (b) H (c) H (d) H20

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  • comment-profile-img>
    Chandra prakash

    see attached file it's very helpful for you dear.. it's simple method to find this type of prob.

    cropped869959335.jpg
    cropped-1838063355.jpg
  • comment-profile-img>
    Dhairya sharma

    first three wave length of isotope , hydrogen , deutrium and tritium are respectively 656.28 , 656.10 , 656.04

  • comment-profile-img>
    Dhairya sharma

    this wave length is for isotope of tritium so the impurity is tritium.

    cropped3452445911323332231.jpg
  • comment-profile-img>
    Abhishek singh best-answer

    I would strongly encourage to remember these three values. This will help you in exam, if they give a similar question.

    cropped6656197930192207253.jpg
  • comment-profile-img>
    Abhishek singh

    Option A is correct. Because H alpha line of Balmer series of Tritium(option A) is 656.04 nm. Hence, the impurity is Tritium.

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