Question

1. Rate of vaporization of a liquid II. Surface tension of a liquid III. Molarity of an aqueous salt solution Which of the given above decrease(s) when temperature is raised? Your answer: Only! Only 11 Only is 1 and 11 Olland III

Answer 1

which of the given below decrease (s) below decrease (s) when temp. is raised i] Rate of vaporization of liquid. ii] surface tension of liquid ii) Molarity of an aqueous sault solution: surface tension of liquid.cfmojanty of an aqueous salt solution decreases with increase in temp. ::option vis correct.i.e.. I and II Ansit in temp. Explanation: - As the tempreture increase the kinetic energy of the liquid molecules are also increases it increases the rate of evaporation of liquid with temperature. But surface tension of liquid decreases with încrease in temp. because with increase the cohesive forces beth liquid molecules becomes weak & due to that the surface tension of liquid decreases Also molosity is exepressed in no. of moles of solute per lite volume of the solution but when poluose temp.increases then intermolecular forces becomes weak f due to that the volume of solution increases slightly therefore molarity of soin decreases Hence, molarity of soin & surface tension are the quantities that decreases with temp. while rate of vaporization increases with temp.