Correct Answer: Option A

Explanation

In the laboratory, nitrogen monoxide (NO), also known as nitric oxide, is commonly prepared by the reduction of dilute nitric acid with copper, resulting in the formation of copper(II) nitrate, water, and nitrogen monoxide gas. 

• The chemical equation for this reaction is: 4HNO\(_3\)  +  Cu → Cu(NO\(_3\))\(_2\)  +  2NO + 4H\(_2\)O

There is an explanation video available below.

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