Which of the Following Changes Represents a Physical Change, Rather

question 15

Multiple Choice

Which of the following changes represents a physical change, rather than evidence of a chemical reaction?

• A)When water and a yellow solution of antifreeze are mixed, the resulting solution is a lighter shade of yellow than the original antifreeze solution.
• B)When concentrated HNO₃ is placed in contact with copper metal, a brown gas is formed, the copper dissolves, and a green solution is formed.
• C)When an egg is fried, the clear part becomes white, and the egg becomes a solid.
• D)When a piece of zinc metal is placed in a blue solution of copper sulfate, the solution turns from blue to colorless, the zinc dissolves, and copper metal is formed.
• E)When solutions of AgNO₃ and NaCl are mixed, a white solid forms.

---

Definitions:

Equity Model

A theory that suggests fairness in the workplace is achieved when the ratio of inputs to outcomes is balanced among employees.

Positives

Positives refer to the favorable aspects or outcomes associated with a situation, decision, or action.

Negatives

Aspects, characteristics, or factors that are considered undesirable, harmful, or detrimental.

Expectancy Model

A theory that describes the motivational force behind an individual's actions as a function of their expectations about outcomes and the values they place on those outcomes.