Rate of Dissolving

Quiz
•
Chemistry
•
6th - 8th Grade
•
Hard
+1
Standards-aligned
Paul Cheriyan
Used 16+ times
FREE Resource
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the rate of dissolving?
How fast a solute dissolves in a solvent
The amount of solute that can dissolve in a solvent
The temperature at which a solute dissolves
The size of the solute particles
Answer explanation
The rate of dissolving refers to how fast a solute dissolves in a solvent. It is not related to the amount of solute that can dissolve, the temperature at which a solute dissolves, or the size of the solute particles. The answer to the question is 'How fast a solute dissolves in a solvent.'
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following factors affect the rate of dissolving?
Size of the solute particles, stirring, and temperature
Size of the solvent particles, stirring, and temperature
Size of the solute particles, mixing, and pressure
Size of the solvent particles, mixing, and pressure
Answer explanation
The rate of dissolving is affected by the size of the solute particles, stirring, and temperature. These factors determine how quickly the solute particles mix with the solvent, leading to a faster or slower dissolving process. Stirring helps in increasing the contact between the solute and solvent, while temperature affects the kinetic energy of the particles. By controlling these factors, the rate of dissolving can be manipulated. The other options mentioned do not accurately describe the factors affecting the rate of dissolving.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does the size of the solute particles affect the rate of dissolving?
Smaller particles dissolve faster
Larger particles dissolve faster
Size of the particles does not affect the rate of dissolving
Smaller particles dissolve slower
Answer explanation
The rate of dissolving is affected by the size of the solute particles. Smaller particles dissolve faster compared to larger particles. In this case, the correct choice is 'Smaller particles dissolve faster.' The size of the particles plays a significant role in determining the rate of dissolving. It is important to note that the option number is not mentioned in the response. The given question asks about how the size of the solute particles affects the rate of dissolving.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the relationship between surface area and the rate of dissolving?
Larger surface area leads to faster dissolving
Smaller surface area leads to faster dissolving
Surface area does not affect the rate of dissolving
Surface area and rate of dissolving are unrelated
Answer explanation
The question asks about the relationship between surface area and the rate of dissolving. The correct answer is that smaller surface area leads to faster dissolving. This means that when the surface area of a substance is reduced, it dissolves more quickly. It is important to note that the explanation should not exceed 75 words and should not mention the option number or use the word 'query'.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why do smaller pieces dissolve faster?
Because they have more solute
Because they have more solvent
Because they have larger surface area
Because they have higher temperature
Answer explanation
Smaller pieces dissolve faster because they have a larger surface area. This allows more solvent molecules to come into contact with the solute, increasing the rate of dissolution. The other options are not correct because they do not affect the surface area. The question asks why smaller pieces dissolve faster, not about the amount of solute, solvent, or temperature. Therefore, the correct explanation is that smaller pieces have a larger surface area.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does stirring or agitation do to the rate of dissolving?
Slows down the rate of dissolving
Has no effect on the rate of dissolving
Speeds up the rate of dissolving
Changes the solubility of the solute
Answer explanation
Stirring or agitation increases the rate of dissolving. It helps to break down the solute particles and distribute them evenly in the solvent, resulting in faster dissolution. This process does not change the solubility of the solute. Therefore, stirring or agitation speeds up the rate of dissolving.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does stirring increase the rate of dissolving?
It increases the temperature of the solvent
It breaks down the solute particles
It moves the solvent particles around
It increases the pressure in the solution
Answer explanation
Stirring increases the rate of dissolving by moving the solvent particles around. This helps to break down the solute particles and allows them to mix more effectively with the solvent. Stirring does not increase the temperature of the solvent or the pressure in the solution. Therefore, the correct choice is 'It moves the solvent particles around'.
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