Question

multiple choice questions

1. what defines a mixture in chemistry?

a) two or more materials chemically combined with new chemical bonds
b) two or more materials combined without breaking or forming chemical bonds
c) a pure substance with a fixed composition
d) a reaction forming new substances

1. which of the following is an example of a heterogeneous mixture?

a) air
b) maple syrup
c) lava lamp (water and wax)
d) salt dissolved in water

1. what is the main difference between a solution and a colloid?

a) solutions scatter light; colloids do not

Explanation:

1. In chemistry, a mixture is defined as two or more materials combined without breaking or forming chemical bonds. A is a description of a compound formed by chemical reactions, C is a pure - substance not a mixture, and D is a chemical reaction.
2. A heterogeneous mixture has visibly different parts. In a lava lamp with water and wax, the wax and water are distinct phases and can be seen as separate entities. Air is a homogeneous gas - phase mixture, maple syrup is a homogeneous liquid, and salt dissolved in water is a homogeneous solution.
3. The question seems incomplete, but the main difference between a solution and a colloid is that colloids scatter light (Tyndall effect) and solutions do not.

Answer:

1. B. Two or more materials combined without breaking or forming chemical bonds
2. C. Lava lamp (water and wax)
3. (Incomplete question, but if based on the known part of the difference, the correct statement is that colloids scatter light and solutions do not)