Question 18

which of the following does not increase the rate of dissolving?

stirring

insulated container

temperature

surface area

The change of surface area does not affect the speed of dissolving.  Hence the correct answer is option D.

Explanation:

Temperature has an effect on dissolving speed of the solute. If the temperature is raised high then dissolving rate becomes high and if the temperature is low the dissolving speed become slow. Steering also helps in increasing the dissolving speed of the solute.

Insulated container also allows to increase the temperature of dissolving the solute into the solvent. But the surface area is only a phenomenon which does not affect the rate of dissolving of a solute. Therefore, we can see that surface area has no effect on the dissolving speed.

the titanic would be the correct answer