Which of the Following Changes Represents a Physical Change, Rather

question 20

Multiple Choice

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

• A)When a piece of zinc metal is placed in a solution of HCl, bubbles begin to form, and the zinc begins to dissolve.
• B)When solid ammonium carbonate, (NH₄)₂CO₃, is heated, the solid disappears, and gaseous ammonia (NH₃), carbon dioxide (CO₂), and water (H₂O) are formed.
• C)When dry ice (solid CO₂) is allowed to stand at room temperature, a white cloud and gaseous CO₂ are formed.
• D)When a solution of KI is mixed with a solution of Pb(NO₃)₂, a yellow solid is formed.
• E)When a piece of copper wire is placed in a solution of AgNO₃, a silvery solid begins to form on the surface of the wire, and the solution turns blue.

Know the functionality and purpose of different ports and expansion cards in computer systems.

Understand the significance and implementation of data duplication and redundancy for data security.

Comprehend the standards and technology advancements in USB ports and optical disc capacities.

Understand the distinction between dominant and servient parcels in the context of property rights.

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Definitions:

Exorcism

A religious or spiritual practice of evicting demons or other spiritual entities from a person or area believed to be possessed.

Diagnostic and Statistical Manual

A comprehensive classification of officially recognized psychiatric disorders, published by the American Psychiatric Association, used by clinicians for diagnosis and research.

International Statistical Classification

A system used globally to categorize diseases, disorders, health conditions, and related health problems for statistical and epidemiological purposes.

American Medical Association

A professional association for physicians and medical students in the United States that aims to promote the art and science of medicine for the betterment of public health.