All of the following are electromagnetic radiations except
A red light
B. sound waves
C. x-rays
D. photon
Correct Answer: B. sound waves
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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.
This shape of a 2s orbital resembles:
A. a hockey puck
B. an (American) football
C. an ellipse
D. a sphere
Correct Answer: D. a sphere
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Which orbital of the following has a principal quantum number of 3 and an angular momentum quantum number of 27
A. 3s
B. 3d
C. 4f
D. 3f
Correct Answer: B. 3d
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Which of the following has the highest energy?
A. gamma rays
B. X-rays
C. Ultra-violet radiation
D. radio waves
Correct Answer: A. gamma rays
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All of the following elements are correct for atomic orbitals except
A. p-sub energy level has 3 orbitals
B. s-orbital has spherical shape
C. energy of 4s is less than that of 4d
D. All d orbitals have 4 lobes
Correct Answer: D. All d orbitals have 4 lobes
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How many orbitals are allowed for principal quantum number (n) of 3?
A. 9
B. 8
C. 6
D. 4
Correct Answer: A. 9
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Which of the following orbitals are degenerate in a multielectron atom?
A. 3d orbitals
B. 3s, 3p, 3d orbitals
C. 1s, 2s orbitals
D. 2d orbitals
Correct Answer: A. 3d orbitals
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