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Which of the following does not repsond positively to the iodoform test ?
- a)Ethanol
- b)Ethanal
- c)Benzophenone
- d)Acetophenone
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
Which of the following does not repsond positively to the iodoform tes...
Explanation:
The iodoform test is a chemical test used to detect the presence of a methyl ketone or an alcohol with a methyl group attached to a carbonyl group. When iodine and sodium hydroxide are added to the compound being tested, iodoform is produced if a methyl ketone or an alcohol with a methyl group attached to a carbonyl group is present. Iodoform is a yellow precipitate with a distinctive odor.
Out of the given options, only benzophenone and acetophenone have a methyl group attached to a carbonyl group, making them capable of producing iodoform. Ethanol and ethanal do not have a methyl group attached to a carbonyl group, so they cannot produce iodoform.
Option C, benzophenone, cannot produce iodoform because it does not have a hydrogen atom attached to the carbonyl group, which is required for the reaction to occur.
Therefore, the correct answer is option C, benzophenone.
The iodoform test is a chemical test used to detect the presence of a methyl ketone or an alcohol with a methyl group attached to a carbonyl group. When iodine and sodium hydroxide are added to the compound being tested, iodoform is produced if a methyl ketone or an alcohol with a methyl group attached to a carbonyl group is present. Iodoform is a yellow precipitate with a distinctive odor.
Out of the given options, only benzophenone and acetophenone have a methyl group attached to a carbonyl group, making them capable of producing iodoform. Ethanol and ethanal do not have a methyl group attached to a carbonyl group, so they cannot produce iodoform.
Option C, benzophenone, cannot produce iodoform because it does not have a hydrogen atom attached to the carbonyl group, which is required for the reaction to occur.
Therefore, the correct answer is option C, benzophenone.
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Community Answer
Which of the following does not repsond positively to the iodoform tes...
The compound should have CH3 CO-group to show the iodoform test. benzophenone does not contain this group and hence does not give iodoform test.
C6 H5 COC6H5 + I2 + NaOH → No reaction
C6 H5 COC6H5 + I2 + NaOH → No reaction
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Which of the following does not repsond positively to the iodoform test ?a)Ethanol b) Ethanalc)Benzophenoned)AcetophenoneCorrect answer is option 'C'. Can you explain this answer?
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