CSS OPTIONAL SUBJECTS MCQs

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Here, you may find CSS Optional Subjects MCQs. If you want to prepare MCQs of optional subjects, CSS MCQs platform is here to serve you while preparing your MCQs portion of your CSS Exam. Please practice these CSS Optional Subjects MCQs on a daily basis.

If a particle of mass 0.1gram moves with a velocity of 10,000 m/s then the wavelength of the wave associated with this particle is

A. 6.626 x 10-34 m
B. 2.145 x 10-39 m
C. 3.313 x 10-21 m
D. 1.325 x 10-18 m

Show Answer…
Correct Answer: A. 6.626 x 10-34 m
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Second ionization energy

A. is always less than first ionization energy
B. is always greater than first ionization energy
C. is equal to the first ionization energy
D. may be greater or less than the first ionization energy depending on the nature of the element

Show Answer…
Correct Answer: B. is always greater than first ionization energy
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