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NEET UG CHEMISTRY MCQ: STRUCTURE OF ATOM
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Statement - I: For Hydrogen spectrum all Balmer lines in the emission spectrum have longer
wavelengths than that of any line of Lyman series.
Statement - II: Transition energy is always greater when electrons come to an orbit with
lower orbit number than an electron come to an orbit with higher orbit number, irrespective to
higher orbit from which electron is coming.
wavelengths than that of any line of Lyman series.
Statement - II: Transition energy is always greater when electrons come to an orbit with
lower orbit number than an electron come to an orbit with higher orbit number, irrespective to
higher orbit from which electron is coming.
View answer and explanation
Correct option: A
If both Statement-I and Statement-II are true, and Statement-II is the correct
explanation of Statement-I
explanation of Statement-I
Option A (If both Statement-I and Statement-II are true, and Statement-II is the correct explanation of Statement-I) is correct because the transition energy determines the wavelength, and transitions to lower orbits have higher energy and thus shorter wavelengths.
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Reason: The oscillating electric and magnetic fields produced by oscillating charged particles are parallel to each other and both are perpendicular to the direction of propagation of the wave. S-I: The orbital has maximum electron density along the y axis and its nodal plane is xz plane.
S-II : For a given atom, for all values of , the -orbitals have the same shape, but the overall size decreases as '' increases. S-I: Elements like and were discovered when their minerals were analysed by spectroscopic methods.
S-II: The element helium was discovered in the sun by spectroscopic method. In which one of the following, the number of protons is greater than number of neutrons but number of protons is less than the number of electrons?