The question describes several properties of a solution, and we need to identify which type of mixture these properties correspond to. We will analyze each property and match it with the characteristics of true solutions, colloidal solutions, and suspensions.
C) A true solution. All the given properties—uniform composition, particle size less than 1 nm, no Tyndall effect, stability (does not settle), and inability to be filtered—are characteristic features of a true solution.
The question asks about the general trend of solubility of solid solutes in water as temperature changes. This is a fundamental concept in chemistry related to thermodynamics and intermolecular forces.
Correct Option: C) Solubility of most solid solutes increases with increase in temperature
This statement accurately describes the general behavior of solid solutes in water. The increased kinetic energy of both solute and solvent particles at higher temperatures facilitates the breaking of solute-solute bonds and the formation of solute-solvent interactions, leading to greater dissolution.
The question asks for the correct formula to calculate 'mass by volume percentage' concentration. This is a common way to express the concentration of a solution, especially in pharmaceutical and medical contexts. It relates the mass of the solute to the total volume of the solution.
B) Mass by Volume % = (Mass of solute in grams / Volume of solution in mL) × 100. This formula correctly represents the definition of mass by volume percentage, using the standard units of grams for solute mass and milliliters for solution volume, and multiplying by 100 to express it as a percentage.
The question asks about the difference between colloidal solutions and true solutions regarding the Tyndall effect. Understanding the nature of particles in each type of solution and how they interact with light is key to answering this question.
Correct Option: B) A colloidal solution SHOWS the Tyndall effect (particles scatter light, making the beam visible) while a true solution does NOT show it (particles too small to scatter light). This option accurately describes the difference in the Tyndall effect between colloidal and true solutions.
To identify the pair with different types of colloidal systems, we need to recall the classification of colloids based on the dispersed phase and dispersion medium. A colloidal system is defined by the state of matter of its dispersed phase and dispersion medium.
Correct Option: A) Milk (emulsion: liquid dispersed in liquid) and Fog (aerosol: liquid dispersed in gas) represent different types of colloidal systems.
This question tests understanding of colloids, specifically the classification of smoke. In a colloidal system, the dispersed phase refers to the substance present in smaller proportion and distributed throughout the other substance, while the dispersion medium is the substance present in a larger proportion in which the dispersed phase is distributed.
Correct Option: A) Dispersed phase: solid particles (carbon, ash); Dispersion medium: gas (air)