Question
Chemistry Question on coordination compounds
The longest wavelength in Ao in the Balmer series of singly ionised helium ion, He+ is
A
(A) 6565 Ao
B
(B) 912 Ao
C
(C) 60932.2 Ao
D
(D) 1641 Ao
Answer
(D) 1641 Ao
Explanation
Solution
Explanation:
1λ=RH[1n12−1n22]z2 [For Balmer series n1=2, For minimum energy n2=3}=10678[122−132]22=10678[14−19]×4=10678[9−436]=10678×59λ=1641.1×10−8cm=1641.1A∘Hence, it is the correct answer.