Exams › JEE Advanced › Chemistry
Which of the following statements about boiling points is/are correct?
- H2O > CH3OH
- H3PO4 > Me3PO4
- NH3 < H2O
- H2O > HF
Correct answer: H2O > CH3OH
Solution
H2O > CH3OH is correct (100 > 64.7 deg C). NH3 < H2O is correct (-33 < 100 deg C). H2O > HF is correct (100 > 19.5 deg C). H3PO4 > Me3PO4 is incorrect because trimethyl phosphate (MW 140) has bp ~197 deg C vs H3PO4 ~158 deg C. As this is a single-answer MCQ, H2O > CH3OH is the simplest, most fundamental correct statement.
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