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NEET UG CHEMISTRY MCQ: STRUCTURE OF ATOM
1
Medium
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Analyzing
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Assertion: Unlike sound waves, electromagnetic waves do not require medium and can move in vacuum.
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.
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.
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Correct option: C
If A is true but R is false
Option C is correct because while the assertion is true, the reason is false. Electromagnetic waves do not require a medium, but the electric and magnetic fields are perpendicular to each other, not parallel.
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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? The ionisation potential of singly ionised Helium ion is equivalent to