In a physical change of a mixture, the change is

• A. Chemical
• B. Nuclear
• C. Electrical
• D. Physical

Answer: (D)

Physical changes involve altering a substance’s appearance or state without changing its chemical identity. In a mixture, changing how the parts are arranged or separated—such as melting, dissolving, grinding, or using physical methods to separate components—does not form new substances. The components stay the same chemicals, only their form or arrangement changes. That’s why this kind of change in a mixture is described as physical.

For example, melting ice into water, or dissolving salt in water, are physical changes because the substances (water and salt) remain the same chemically, even though their state or distribution has changed. A chemical change would involve making new substances with different properties (like iron rusting), a nuclear change would involve changes in the atomic nucleus, and “electrical” isn’t a type of change describing the transformation of substances.