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In hydrogen atom spectrum, (R Rydberg's constant ) A. the maximum wavelength of the radiation of Lyman series is 4 3 R B. the Balmer series lies in the visible region of the spectrum C. the minimum wavelength of the radiation of Paschen series is 9 R D. the minimum wavelength of Lyman series is 5 4 R Choose the correct answer from the options given below :

Options

  1. AB, D Only
  2. BA, B and C Only
  3. CA, B and D Only
  4. DA, B Only

Correct answer

B. A, B and C Only

Step-by-step solution

A. Maximum wavelength of Lyman series ( n=1 to n=2 ): 1 = R (1 - 1 4 ) = 3R 4 = 4 3R TRUE B. The Balmer series lies in the visible region of the spectrum. TRUE C. Minimum wavelength of Paschen series ( n=3 to n= ): 1 ' = R ( 1 9 ) ' = 9 R TRUE D. Minimum wavelength of Lyman series ( n=1 to n= ): 1 = R (1 ) = 1 R , NOT 5 4R FALSE So A, B and C are correct.

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