Debanjana adhikari Asked a Question
May 15, 2020 1:19 pmpts 30 pts
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 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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  • Chandra dhawan
    see attached file it's very helpful for you dear.. it's simple method to find this type of prob.
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  • Vaishnavi rajora
    you can find out then with the formula
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  • Vaishnavi rajora
    first three wave length of isotope , hydrogen , deutrium and tritium are respectively 656.28 , 656.10 , 656.04
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  • Vaishnavi rajora
    this wave length is for isotope of tritium so the impurity is tritium.
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  • Abhishek singh thankyou
    I would strongly encourage to remember these three values. This will help you in exam, if they give a similar question.
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  • 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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