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Iodoform test is not given by [1999]
- a)2-Pentanone
- b)Ethanol
- c)Ethanal
- d)3-Pentanone
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
Iodoform test is not given by [1999]a)2-Pentanoneb)Ethanolc)Ethanald)3...
Iodoform test is exhibited by ethyl alcohol acetaldehyde, acetone methyl ketones and those alcohols which possess CH3CH(OH)- group. As 3-pentanone does not contain
CH3CO-group as therefore it does not give iodoform test.
CH3CO-group as therefore it does not give iodoform test.
Most Upvoted Answer
Iodoform test is not given by [1999]a)2-Pentanoneb)Ethanolc)Ethanald)3...
Give the structure of compounds which give a positive iodoform test and have the following characteristics (an aldehyde or ketone which has a methyl group adjecent to the carbonyl group will give a positive test) 3-pentanone has a methyl & carbonyl group still does not give a positive iodoform test.l
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Community Answer
Iodoform test is not given by [1999]a)2-Pentanoneb)Ethanolc)Ethanald)3...
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Iodoform Test Explanation:
The iodoform test is a chemical reaction used to detect the presence of methyl ketones (compounds with the structure RCOR'). When a methyl ketone is treated with iodine in the presence of a base like sodium hydroxide, a yellow precipitate of iodoform is formed.
Explanation of Correct Answer:
Option D: 3-Pentanone
3-Pentanone is a methyl ketone with the structure CH3COCH2CH2CH3. When 3-Pentanone undergoes the iodoform test, it forms a yellow precipitate of iodoform due to the presence of the methyl ketone group.
Explanation of Incorrect Options:
Option A: 2-Pentanone
2-Pentanone is also a methyl ketone but does not give a positive iodoform test as it lacks the necessary structural features.
Option B: Ethanol
Ethanol is not a methyl ketone and hence does not give a positive iodoform test.
Option C: Ethanal
Ethanal is an aldehyde and does not contain the methyl ketone group required for the iodoform test to occur.
In conclusion, option D (3-Pentanone) is the correct answer as it is a methyl ketone that gives a positive iodoform test, while the other options do not possess the necessary structural features for this test to occur.
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Iodoform test is not given by [1999]a)2-Pentanoneb)Ethanolc)Ethanald)3-PentanoneCorrect answer is option 'D'. Can you explain this answer?
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