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.
Which of the following has the largest wavelength?
A. visible light
B. x-rays
C. infrared light
D. ultraviolet radiation
Show Answer…...Hide AnswerCorrect Answer: C. infrared light
» Read More…
Green light has a wavelength of 5200A. Calculate the energy of one photon of green light.
A. 3.4 x 10-40 J
B. 3.4 x 10-30 J
C. 3.8 x 10-26 J
D. 3.8 x 10-19 J
Show Answer…...Hide AnswerCorrect Answer: D. 3.8 x 10-19 J
» Read More…
The size of an atomic orbital is associated with
A. principal quantum number (n)
B. angular momentum quantum number (I)
C. magnetic quantum number (mI)
D. spin quantum number (ms)
Show Answer…...Hide AnswerCorrect Answer: A. principal quantum number (n)
» Read More…
In the quantum mechanical treatment of the hydrogen atom, which one of the following combinations of quantum numbers is not allowed?
A. 3, 1, -1
B. 3, 2, 2
C. 3, 2, -1
D. 3, 3, 2
Show Answer…...Hide AnswerCorrect Answer: D. 3, 3, 2
» Read More…
“Each electron in an atom must have its own unique set of quantum numbers” is a statement of
A. Aufbau principle
B. Pauli exclusion principle
C. Hund’s rule
D. Periodic law
Show Answer…...Hide AnswerCorrect Answer: B. Pauli exclusion principle
» Read More…
All of the following statements are correct for atomic structure and quantum numbers except
A. In a given atom, the maximum number of electrons having principal quantum
number n = 3, is 18
B. The number of orbitals in a given f subshell is 7
C. For n=4, the largest possible value of I is 3
D. For n=4, the largest possible value of mI is 2
Show Answer…...Hide AnswerCorrect Answer: D. For n=4, the largest possible value of mI is 2
» Read More…
In a Millikan oil-drop experiment, the charges on several different oil drops were as follows: -5.92; -4.44; -2.96; -8.88. The units are arbitrary. What is the likely value of the electronic charge in these arbitrary units?
A. -1.11
B. -1.48
C. -2.22
D. -2.96
Show Answer…...Hide AnswerCorrect Answer: B. -1.48
» Read More…