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Stoichiometry - Engineering

Q1:

Pick out the wrong statement.

A Raoult's law holds good for the solubility of polar gases in non-polar liquids.

B Molecules with symmetrical arrangement (e.g., CH4 and CCl4) are non-polar.

C Most of the hydrocarbons are nonpolar.

D Generally, nonpolar compounds are chemically inactive, conduct electricity poorly and do not ionise.

ANS:A - Raoult's law holds good for the solubility of polar gases in non-polar liquids.

The wrong statement is: Raoult's law holds good for the solubility of polar gases in non-polar liquids. Raoult's law actually holds good for the solubility of non-volatile solutes in volatile solvents, regardless of whether they are polar or non-polar. It is not specific to the solubility of polar gases in non-polar liquids. Instead, Raoult's law describes the behavior of ideal solutions, where the vapor pressure of a solution is directly proportional to the mole fraction of solvent present. So, the correct statement is: Raoult's law holds good for the solubility of polar gases in non-polar liquids.