1.
What are solutions made up of?
Correct Answer
A. Solutes and a solvent
Explanation
Solutions are made up of solutes and a solvent. A solute is a substance that is dissolved in a solvent, while a solvent is a substance that dissolves the solute. The solute particles are dispersed throughout the solvent, resulting in a homogeneous mixture. This allows the solute to be evenly distributed and dissolved in the solvent, forming a solution.
2.
What will happen to a saturated solution if we increase its temperature?
Correct Answer
A. The saturation will become unsaturated.
Explanation
When the temperature of a saturated solution is increased, the solubility of the solute generally increases. This means that more solute can dissolve in the solution. As a result, the solution becomes unsaturated because it can now dissolve more solute than before.
3.
What is an example of a saturated solution?
Correct Answer
D. All of the above
Explanation
All of the options mentioned (soda, carbonated water, and seawater) are examples of saturated solutions. A saturated solution is a solution in which the maximum amount of solute has been dissolved at a given temperature and pressure. In the case of soda, carbonated water, and seawater, these solutions contain dissolved gases (such as carbon dioxide in carbonated water) or dissolved solids (such as salts in seawater) at their maximum solubility levels. Therefore, all of these options represent examples of saturated solutions.
4.
A solution that contains more dissolved substance than a saturated solution is called
Correct Answer
B. Supersaturated Solution
Explanation
A supersaturated solution is a solution that contains more dissolved substance than a saturated solution. In a saturated solution, the maximum amount of solute has dissolved in the solvent at a given temperature. However, in a supersaturated solution, an excess amount of solute is dissolved, usually by heating the solution and then slowly cooling it down. This results in a solution that is unstable and can easily crystallize if disturbed or seeded with a crystal of the solute. Therefore, the correct answer is Supersaturated Solution.
5.
What is the difference between saturated and unsaturated fatty acids?
Correct Answer
A. Saturated fatty acids lack double bonds with individual carbon atoms, whereas unsaturated fatty acids contain at least one double bond.
Explanation
Saturated fatty acids lack double bonds with individual carbon atoms, whereas unsaturated fatty acids contain at least one double bond. This means that the structure of saturated fatty acids consists of single bonds between all carbon atoms, while unsaturated fatty acids have at least one double bond between carbon atoms. This difference in structure affects the physical properties and health effects of these types of fatty acids. Saturated fats are typically solid at room temperature and are associated with an increased risk of heart disease, while unsaturated fats are usually liquid at room temperature and can have various health benefits when consumed in moderation.
6.
A saturated solution converts into _______ on the increase of temperature.
Correct Answer
C. Unsaturated solution
Explanation
As the temperature of a saturated solution increases, it becomes less saturated and more solute can dissolve in it. This means that the solution is no longer saturated and is now classified as an unsaturated solution. Therefore, the correct answer is unsaturated solution.
7.
The maximum amount of salt that can be dissolved in 100ml of water is:
Correct Answer
B. 36 grams
Explanation
The correct answer is 36 grams because it is the highest amount among the given options. It is the maximum amount of salt that can be dissolved in 100ml of water.
8.
What is the amount of solute in a given amount of solvent or solution called?
Correct Answer
C. Concentration
Explanation
Concentration refers to the amount of solute dissolved in a given amount of solvent or solution. It is a measure of the strength or density of a solution. The concentration of a solution can be expressed in various units such as molarity, mass/volume percent, or parts per million. By knowing the concentration, one can determine the amount of solute present in a specific volume or mass of the solvent or solution.
9.
A solid solute is added to a solvent, some solute dissolves, and its concentration increases in the solution. This process is known as:
Correct Answer
C. Dissolution
Explanation
Dissolution refers to the process in which a solid solute is added to a solvent, resulting in the solute particles dispersing and mixing evenly throughout the solvent. As a result, the concentration of the solute increases in the solution. This process is commonly observed when sugar or salt is added to water, for example. It is important to note that dissolution is different from sublimation, which refers to the direct transition of a solid to a gas without passing through the liquid phase, and from crystallization, which is the formation of crystals from a solution.
10.
The substance dissolved in a solution is called
Correct Answer
A. Solute
Explanation
The substance dissolved in a solution is called the solute. In a solution, the solute is the component that is present in lesser amount and gets dissolved in the solvent. The solute can be a solid, liquid, or gas that is uniformly distributed throughout the solvent. It is responsible for giving the solution its characteristic properties and can be separated from the solvent through processes like evaporation or filtration.