Question

Given below are the spectral lines for an atom of hydrogen. Mark the lines which are not correctly matched with the value of $n_1$ and $n_2$?

	Series	$n_1$	$n_2$	Region
(i)	Lyman	$1$	$2$, $3$, $....$	Ultraviolet
(ii)	Balmer	$2$	$3$, $4$, $....$	Infrared
(iii)	Paschen	$3$	$4$, $5$, $....$	Infrared
(iv)	Pfund	$4$	$5$, $6$, $....$	Infrared

• A. (i) and (ii)
• B. (i) and (iii)
• C. (ii) and (iv)
• D. (i) and (iv)

Answer 1

Answer: (C)

(ii) Balmer, $n_1= 2$; $n_2 = 3$,$4$; region - visible
(iv) $P$fund, $n_1 = 5$ ; $n_2 = 6$, $7$; region - infrared