List of top Chemistry Questions on atomic spectra

Given below are two statements: 
Statement (I): A spectral line will be observed for a 2p\(_x\) \(\rightarrow\) 2p\(_y\) transition.
Statement (II): 2p\(_x\) and 2p\(_y\) are degenerate orbitals.
In the light of the above statements, choose the correct answer from the options given below:
The number of following statements which are incorrect line emission
The number of following statement/s which is/are\(\text{\underline{ incorrect}}\) is______  
(A) Line emission spectra are used to study the electronic structure  
(B) The emission spectra of atoms in the gas phase show a continuous spread of wavelength from red to violet  
(C) An absorption spectrum is like the photographic negative of an emission spectrum  
(D) The element helium was discovered in the sun by spectroscopic method.
The first emission line in the atomic spectrum of hydrogen in the Balmer series appears at:
If the series limit wavelength of Lyman series for the hydrogen atom is 912AA, then the series limit wavelength for Balmer series of hydrogen atoms is:
One of the lines in the emission spectrum of Li²+ has the same wavelength as that of the 2nd line of the Balmer series in hydrogen spectrum. The electronic transition corresponding to this line is n = 12 → n = x. Find the value of x.
The first emission line in the atomic spectrum of hydrogen in the Balmer series appears at:
If the series limit wavelength of the Lyman series for hydrogen atom is 912AA, then the series limit wavelength for the Balmer series of hydrogen atom is:
One of the lines in the emission spectrum of \(\text{Li}^{2+}\) has the same wavelength as that of the second line of the Balmer series in hydrogen spectrum. The Balmer transition corresponds to \(n=4\rightarrow2\). If the corresponding transition in \(\text{Li}^{2+}\) is \(n=12\rightarrow x\), find the value of \(x\).
The wave number of the limiting line in Lyman series of hydrogen is \(109678\,\text{cm}^{-1}\). The wave number of the limiting line in Balmer series of He\(^+\) would be:
Hydrogen atom in ground state is excited by a monochromatic radiation of λ=975. Number of spectral lines in the resulting spectrum emitted will be