Assertion: The molality of the solution does not change with change intemperature.Reason: The molality if expressed in units of moles per 1000 gm of solvent.a) Both Aand Rare true and Ris correct explanation of A.b) Both Aand Rare true but Ris not the correct explanation ofA.QUESTIONSSECTIONAA is true but Ris false.d) Both Aand Rare false
Question
Assertion: The molality of the solution does not change with change intemperature.Reason: The molality if expressed in units of moles per 1000 gm of solvent.a) Both Aand Rare true and Ris correct explanation of A.b) Both Aand Rare true but Ris not the correct explanation ofA.QUESTIONSSECTIONAA is true but Ris false.d) Both Aand Rare false
Solution
The assertion is true. Molality is a measure of the concentration of a solute in a solution in terms of amount of substance in a specified amount of mass of the solvent. This measure is not affected by changes in temperature because it is based on the mass of the solvent, which does not change with temperature.
The reason is false. Molality is not expressed in units of moles per 1000 gm of solvent. Instead, it is defined as the number of moles of solute per kilogram of solvent.
So, the correct answer is: A is true but R is false.
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