Roshan took a small amount of hydrochloric acid in a test tube and heated it. He
dipped a glass rod in ammonia solution and hold it on the top of the test tube. He
observed a white smoke emanating from the tip of the glass rod.
1. What must have happened? Explain.
2. Write balanced chemical equation for the reaction.
3. Name the type of reaction
Answers
Answer:
1. i. Due to heating HCl vapours started coming out from the test tube, and NH,
gas came out from the solution on the glass rod.
ii. The ammonia gas and hydrogen chloride gas reacted to from the salt ammonium
chloride in gaseous state first, but immediately due to the condensation
process at room temperature it got transformed into the solid state.
2. As a result, white smoke was formed.
NH2(g) + HCl(g) → NH,Cl(s)
Hydrogen Chloride Ammonium Chloride
3. It is a combination reaction.
Ammonia.
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Answer:
1. i. Due to heating HCl vapours started coming out from the test tube, and NH,
gas came out from the solution on the glass rod.
ii. The ammonia gas and hydrogen chloride gas reacted to from the salt ammonium
chloride in gaseous state first, but immediately due to the condensation
process at room temperature it got transformed into the solid state.
2. As a result, white smoke was formed.
NH2(g) + HCl(g) → NH,Cl(s)
Hydrogen Chloride Ammonium Chloride
3. It is a combination reaction.
Ammonia.