. Which of the following is a homogeneous mixture?
A)
gasoline
B)
vegetable oil and water
C)
sugar dissolved in water
D)
A and C
E)
A, B, and C
The Correct Answer and Explanation is:
The correct answer is:
D) A and C
Explanation:
To determine which of the options are homogeneous mixtures, we first need to understand what a homogeneous mixture is.
Definition:
A homogeneous mixture is a mixture in which the composition is uniform throughout. The different components are not visibly distinguishable, and the mixture appears as a single phase (solid, liquid, or gas). Examples include air, saltwater, and vinegar.
In contrast, a heterogeneous mixture has visibly distinct components or phases. The composition is not uniform throughout the sample. Examples include sand and water or oil and vinegar.
Analysis of Each Option:
A) Gasoline
Gasoline is a homogeneous mixture. It is a blend of hydrocarbons and sometimes additives, all thoroughly mixed to form a uniform liquid. You cannot distinguish the different compounds in gasoline with the naked eye or through simple separation.
B) Vegetable oil and water
This is a heterogeneous mixture. Oil and water do not mix uniformly. They form two separate layers because oil is non-polar and water is polar. You can easily distinguish the two components, which means this is not a homogeneous mixture.
C) Sugar dissolved in water
This is a homogeneous mixture. Once the sugar dissolves completely, it forms a uniform solution. You can no longer see the sugar, and the solution appears the same throughout, even though it contains two substances (sugar and water).
Correct Answer: D) A and C
- A (Gasoline) and C (Sugar dissolved in water) are both homogeneous mixtures.
- B (Vegetable oil and water) is a heterogeneous mixture because the components remain physically separate and do not mix uniformly.
Understanding the nature of mixtures is essential in chemistry and practical applications like cooking, fuel formulation, and pharmaceuticals, where uniformity is often critical.
