Home
Class 11
CHEMISTRY
The shortest wavelength of H-atom in Lym...

The shortest wavelength of H-atom in Lyman series is x, then longest wavelength in Balmer series of `He^(+)` is

A

`(9x)/(5)`

B

`(36x)/(5)`

C

`(x)/(4)`

D

`(5x)/(9)`

Text Solution

Verified by Experts

The correct Answer is:
A
`bar(nu) = (1)/(lambda) = R'Z^(2)[(1)/(n_(1)^(2))-(1)/(n_(2)^(2))]`
For shortest wavelength (maximum energy) in Lyman series of hydrogen Z = 1, `n_(2) = 1, n_(2) rarr oo` and
`lambda = x`
`(1)/(x) = R'`
For longest wavelength (minimum energy) in Balmer series of `He^(+), Z = 2` and `n_(1) = 2, n_(2) = 3`.
`(1)/(lambda) = R'2^(2)[(1)/(2^(2))-(1)/(3^(2))]`
`(1)/(lambda) = (4)/(x)[(1)/(4)-(1)/(9)]`
`(1)/(lambda) = (4)/(x)(5)/(36)`
`lambda = (9x)/(5)`
Promotional Banner

Topper's Solved these Questions

  • ATOMIC STRUCTURE

    DINESH PUBLICATION|Exercise Revision Questions|258 Videos

  • ATOMIC STRUCTURE

    DINESH PUBLICATION|Exercise Selected Straight Objective Type MCQs|70 Videos

  • APPENDIX

    DINESH PUBLICATION|Exercise Completion Reactions|15 Videos

  • BIOMOLECULES

    DINESH PUBLICATION|Exercise Reason|1 Videos

Similar Questions

Explore conceptually related problems

If the shortest wavelength of H-atom in Lyman series is x , then longest wavelnght in Balmer series of HE^(2+) is :

If the shortest wavelength of H atom in Lyman series is x, then longest wavelength in Balmer series of H–atom is

The shortest wavelength of He^(+) in Balmer series is x . Then longest wavelength in the Paschene series of Li^(+2) is :-

The shoretest wavelength in Lyman series is 91.2 nm. The longest wavelength of the series is

The shortest wavelength in Lyman series is 912 Å. The shortest wavalength in Paschen series is

If the shortest wavelength in Lyman series of hydrogen atom is A, then the longest wavelength in Paschen series of He^(+) is: