Given below are two statements: Statement I: When an electric discharge is passed through gaseous hydrogen, the hydrogen molecules dissociate and the energetically excited hydrogen atoms produce elect

Question

Given below are two statements: Statement I: When an electric discharge is passed through gaseous hydrogen, the hydrogen molecules dissociate and the energetically excited hydrogen atoms produce electromagnetic radiation of discrete frequencies. Statement II: The frequency of second line of Balmer series obtained from He + is equal to that of first line of Lyman series obtained from hydrogen atom. In the light of the above statements, choose the correct answer from the options given below:

(A) Both Statement I and Statement II are true
(B) Both Statement I and Statement II are false
(C) Statement I is false but Statement II is true
(D) Statement I is true but Statement II is false

Prashant Kotian · Accepted Answer

Correct answer: A. 2 1 1 1 RZ n n          For Ist line of lyman series in H-atom 2 1 1 R(1) 2          3R   for 2 nd line of Balmer series of He + 2 1 1 R(2) ' 4          3R '   As  and ’ is equal so frequency of these lines will be also equal. SECTION-B

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