Consider the following:I. The electron spin q | vedclass

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(A) Statement $I$ is incorrect because the electron spin quantum number describes the orientation of the spin of the electron, not the nucleus.Stateme

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$II$ $\&$ $IV$ only

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(A) Statement $I$ is incorrect because the electron spin quantum number describes the orientation of the spin of the electron, not the nucleus.Statement $II$ is correct because orbitals with the same $n$ and $l$ values (degenerate orbitals) have the same energy in the absence of an external magnetic field.Statement $III$ is incorrect because the energy of a photon $(E = h
u = \frac{hc}{\lambda})$ is inversely proportional to the wavelength $(\lambda)$ and directly proportional to the wave number $(\bar{
u} = \frac{1}{\lambda})$.Statement $IV$ is correct because the Lyman series corresponds to electronic transitions to the $n=1$ energy level, which emits radiation in the ultra-violet region.Therefore, statements $II$ and $IV$ are correct.

Column-$A$	Column-$B$
$(1)$ Dalton	$(A)$ Photoelectric effect
$(2)$ Maxwell	$(B)$ Wave theory
$(3)$ Huygens	$(C)$ Atomic theory
	$(D)$ Electromagnetic radiation

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Match the items in Column-$A$ with the items in Column-$B$.

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$(1)$ Dalton $(A)$ Photoelectric effect

$(2)$ Maxwell $(B)$ Wave theory

$(3)$ Huygens $(C)$ Atomic theory

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