Question

Identify the correct matched lists

	List I		List II
i	Total number of lines in H-spectrum for a transition 5 -> 1	A	Decreases
ii	Intensity of spectral line in the spectrum, as	B	H-spectrum
iii	n value increases	C	10
iv	Band spectrum is due to	D	Rotations and vibrations of atoms in molecules in addition to electronic transition
	The proof for the presence of energy levels in an atom	E	lncreases

• A. i-A, ii-E, iii-D, iv-B
• B. i-E, ii-E, iii-D, iv-D
• C. i-C, ii-A, iii-D, iv-B
• D. i-C, ii-E, iii-D, iv-B

Answer 1

The correct option is C i-C, ii-A, iii-D, iv-B

(i) Total number of lines in H-spectrum for a transition $5\to 1$ is 10.
$\frac{(n_2-n_1)(n_2-n_1+1)}{2}=\frac{(5-1)(5-1+1)}{2}=\frac{4\times 5}{2}=10$
(ii) Intensity of spectral line in the spectrum decreases, as n value increases.
(iii) Band spectrum is due to rotations and vibrations of atoms in molecules in addition to electronic transition.
(iv) The proof for the presence of energy levels in an atom is obtained from $H$-spectrum. The space between two lines corresponds to the energy gap between two energy levels.