Given below are two statements Statement I When an

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:

DivineJEE · Accepted Answer

(1 / lambda)=R Z^2(frac1n_1^2-frac1n_2^2) For Ist line of lyman series in H -atom \ (1 / lambda)= R(1)^2(frac11^2-frac12^2) \ (1 / lambda)=(3 R / 4) for 2^ nd line of Balmer series of He^+ frac1lambda^prime=R(2)^2(frac12^2-frac14^2) frac1lambda^prime=frac3 R4 As lambda and lambda^prime is equal so frequency of these lines will be also equal.

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