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Among the following hydrocarbons which decolourise bromine water, but does not give precipitate with ammonical AgNO3 is
- a)CH4
- b)C2H4
- c)C2H2
- d)C2H6
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Among the following hydrocarbons which decolourise bromine water, but ...
Decolourisation of Bromine water indicates the presence of unsaturation in the hydrocarbon. Precipitation with ammonical AgNO3 indicates the presence of a terminal alkyne.
Explanation:
• CH4 is a saturated hydrocarbon with no unsaturation and therefore it does not decolourize bromine water.
• C2H2 is an unsaturated hydrocarbon with a triple bond between the two carbon atoms. It decolourizes bromine water and also forms a white precipitate with ammonical AgNO3 indicating the presence of a terminal alkyne.
• C2H6 is a saturated hydrocarbon with no unsaturation and therefore it does not decolourize bromine water or give a precipitate with ammonical AgNO3.
• C2H4 is an unsaturated hydrocarbon with a double bond between the two carbon atoms. It decolourizes bromine water but does not give a precipitate with ammonical AgNO3 indicating the absence of a terminal alkyne.
Therefore, the correct answer is option B - C2H4.
Explanation:
• CH4 is a saturated hydrocarbon with no unsaturation and therefore it does not decolourize bromine water.
• C2H2 is an unsaturated hydrocarbon with a triple bond between the two carbon atoms. It decolourizes bromine water and also forms a white precipitate with ammonical AgNO3 indicating the presence of a terminal alkyne.
• C2H6 is a saturated hydrocarbon with no unsaturation and therefore it does not decolourize bromine water or give a precipitate with ammonical AgNO3.
• C2H4 is an unsaturated hydrocarbon with a double bond between the two carbon atoms. It decolourizes bromine water but does not give a precipitate with ammonical AgNO3 indicating the absence of a terminal alkyne.
Therefore, the correct answer is option B - C2H4.
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Among the following hydrocarbons which decolourise bromine water, but does not give precipitate with ammonical AgNO3 isa)CH4b)C2H4c)C2H2d)C2H6Correct answer is option 'B'. Can you explain this answer?
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