According to NASA on which planet purple rocks are found?
A. Jupitar
B. Mars
C. Earth
D. Neptune
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.
How many valence electrons are in chlorine(cl) atom?
A. Chlorine has 1 valence electrons
B. Chlorine has 2 valence electrons
C. Chlorine has 7 valence electrons
D. Chlorine has 6 valence electrons (more…)
Hailey’s comet becomes visible after every_________?
A. 86 years
B. 76 years
C. 1000 years
D. 365 years
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