A dense white fume is formed when ammonia gas reacts with

Assessment: JAMB UTME - Chemistry - 2005 Subject: Chemistry

Question 1 Report

A dense white fume is formed when ammonia gas reacts with
Answer Details
When ammonia gas (NH3) reacts with hydrochloric acid (HCl), a dense white fume is formed, which is actually ammonium chloride (NH4Cl). This is because the ammonia reacts with the hydrogen chloride in the air to form ammonium chloride, which is a white solid that sublimes at room temperature, meaning it turns directly from a solid to a gas. Therefore, the correct answer would be "HCl".
Read lesson note on Acids, Bases And Salts (JAMB)
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