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Stoichiometry

Q1:

The vapor pressure of liquids (having similar chemical nature) at any specified temperature __________ with increasing molecular weight.

A increases

B decreases

C remains unchanged

D increases linearly

ANS:B - decreases

The vapor pressure of liquids (with similar chemical nature) generally decreases with increasing molecular weight. This is because molecules with higher molecular weight tend to have stronger intermolecular forces, which makes it harder for them to escape the liquid phase and enter the vapor phase. Therefore, the correct answer is: (b) decreases



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