Questions: Which of the following demonstrates a chemical reaction of water? - Water dissolves sugar. - Water produces gas with sodium metal. - Water boils to produce steam at 100 degrees Celsius (212 degrees Fahrenheit). - Water and oil separate when combined.

Which of the following demonstrates a chemical reaction of water? - Water dissolves sugar. - Water produces gas with sodium metal. - Water boils to produce steam at 100 degrees Celsius (212 degrees Fahrenheit). - Water and oil separate when combined.
Transcript text: Question: 9 of 50 Time Remaining: 00:54:14 FLAG Which of the following demonstrates a chemical reaction of water? Water dissolves sugar. Water produces gas with sodium metal. Water boils to produce steam at $100^{\circ} \mathrm{C}\left(212^{\circ} \mathrm{F}\right)$. Water and oil separate when combined. PREVIOUS COMTINUE Full screen mode is in effect during your proctored testing. Please Note: Attempting to exit out of full screen mode or pressing the escape button will result in an alert message sent to the proctor and may result in the termination of the assessment. Copyright © 2025 Assessment Technologies Institute, L.L.C. All rights reserved.
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Solution

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Solution Steps

Step 1: Understanding Chemical Reactions

A chemical reaction involves the transformation of substances into new substances with different chemical properties. This typically involves breaking and forming chemical bonds.

Step 2: Analyzing Each Option

  1. Water dissolves sugar: This is a physical change where sugar molecules are dispersed in water, but no new substances are formed.

  2. Water produces gas with sodium metal: When water reacts with sodium metal, it forms sodium hydroxide and hydrogen gas. This is a chemical reaction because new substances are formed.

  3. Water boils to produce steam at \(100^{\circ} \mathrm{C}\left(212^{\circ} \mathrm{F}\right)\): This is a physical change where water changes from liquid to gas, but the chemical composition remains the same.

  4. Water and oil separate when combined: This is a physical change due to the immiscibility of water and oil, with no new substances formed.

Step 3: Identifying the Chemical Reaction

Among the options, the reaction of water with sodium metal is the only one that results in the formation of new substances, indicating a chemical reaction.

Final Answer

\(\boxed{\text{Water produces gas with sodium metal.}}\)

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