Which reagent(s) distinguish(es) ethylene from acetylene?Hot alk. KMnO4Cl2 dissolved in CCl4Ammonical Cu2Cl2Amm. AgNO3
Question
Which reagent(s) distinguish(es) ethylene from acetylene?Hot alk. KMnO4Cl2 dissolved in CCl4Ammonical Cu2Cl2Amm. AgNO3
Solution
The reagent that distinguishes ethylene from acetylene is Ammonical Cu2Cl2.
Here's the step by step process:
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Ethylene (C2H4) and Acetylene (C2H2) are both hydrocarbons, but they differ in their structure and reactivity. Ethylene is an alkene with a carbon-carbon double bond, while acetylene is an alkyne with a carbon-carbon triple bond.
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When treated with Ammonical Cu2Cl2 (also known as ammoniacal cuprous chloride), acetylene forms a red precipitate of copper acetylide (Cu2C2), while ethylene does not react.
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Therefore, the formation of a red precipitate indicates the presence of acetylene, allowing us to distinguish it from ethylene.
The other reagents mentioned (Hot alk. KMnO4, Cl2 dissolved in CCl4, Amm. AgNO3) do not specifically distinguish between ethylene and acetylene.
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