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.

Which of the following statements is incorrect?

A. dispersion force is the weakest type of intermolecular interactions
B. the strong intermolecular attractions in H2O result from hydrogen bonding
C. boiling point of H2S is less than H2O
D. boiling point of non-polar substances tends to decrease with increasing molecular weight

Show Answer…
Correct Answer: D. boiling point of non-polar substances tends to decrease with increasing molecular weight
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The increasing vapor pressure caused by heating a liquid is due to

A. increase intermolecular interactions
B. increasing potential energy of molecules
C. increasing kinetic energy of molecules
D. decreasing surface tension

Show Answer…
Correct Answer: C. increasing kinetic energy of molecules
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