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Engineering Exams RRB-JE CMA (Chemical and Metallurgical Assistant) General Abilities 2025 22.04.25 Paper-2 Shift-2 Medium +1 -0.33
What happens when an acid reacts with a metal oxide?
Correct Answer: A. A salt and water are formed.
Explanation: When a metal oxide reacts with an acid, the resulting products are a salt and water. This process is a neutralization reaction because most metal oxides are basic in nature. For instance, if copper(II) oxide is treated with hydrochloric acid, it produces copper(II) chloride (the salt) and water. The general chemical equation for this interaction is: Metal Oxide + Acid -> Salt + Water.
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