Practicing Success
The study of hydrogen atom spectrum has mainly five series. Choose the correct sequence of these series in increasing order of their shortest wavelength. A. Lyman Series B. Pfund Series C. Paschen Series D. Bracket Series E. Balmer Series Choose the correct answer from the options given below: |
B, A, D, C, E B, C, D, E, A A, E, C, D, B A, C, E, B, D |
A, E, C, D, B |
Spectral series in hydrogen atoms corresponds to A. Lyman Series{ n1 = 1 , n2 = 2,3,4.....} – Ultraviolet E. Balmer Series { n1 = 2 , n2 = 3,4,5 .....} – Visible C. Paschen Series – { n1 = 3 , n2 = 4,5,6.....}Infra-red D. Bracket Series – { n1 = 4 , n2 = 5,6,7.....} Infra-red B. Pfund Series – { n1 = 5 , n2 = 6,7,8.....}Far infra-red With increase in number of n1 the gap between two consecutive level decreases and hence wavelength increases. Correct sequence of increasing order of their wavelength is A, E, C, D, B. |