Questions: Which of the following describes a chemical property of water? Water reacts violently with sodium metal. Water is liquid at room temperature. Water is a colorless liquid. Water boils at 100°C.

Which of the following describes a chemical property of water? Water reacts violently with sodium metal. Water is liquid at room temperature. Water is a colorless liquid. Water boils at 100°C.
Transcript text: QUESTION (i) ANSWER Chemistry involves two basic types of changes: physical and chemical. Associated with these changes are physical properties and chemical properties. Physical properties are characteristics used to describe the appearance of a substance. This includes observations like the state, color, size, and shape of matter. Chemical properties are characteristics used to describe the chemical behavior of a substance. This includes observations like reactivity, as well as the inability to react. Which of the following describes a chemical property of water? Water reacts violently with sodium metal. Water is liquid at room temperature. Water is a colorless liquid. Water boils at $100^{\circ} \mathrm{C}$.
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Solution

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Solution Steps

Step 1: Identify the Type of Properties

First, we need to distinguish between physical and chemical properties. Physical properties describe the appearance and state of a substance without changing its chemical composition. Examples include state, color, size, and boiling point. Chemical properties describe how a substance reacts with other substances, indicating a change in chemical composition.

Step 2: Analyze Each Option

Let's analyze each option to determine if it describes a physical or chemical property of water:

  1. Water reacts violently with sodium metal. This describes a chemical reaction, indicating a chemical property.
  2. Water is liquid at room temperature. This describes the state of water, which is a physical property.
  3. Water is a colorless liquid. This describes the appearance of water, which is a physical property.
  4. Water boils at $100^{\circ} \mathrm{C}$. This describes the boiling point of water, which is a physical property.

Final Answer

The option that describes a chemical property of water is: \[ \boxed{\text{Water reacts violently with sodium metal.}} \]

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