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The reagent (s) which can be used to distinguish acetophenone from benzophenone is (are):
- a)2,4- Dinitrophenylhydrazine
- b)Aqueous solution of NaHSO3
- c)Benedict reagent
- d)I2 and NaOH.
Correct answer is option 'D'. Can you explain this answer?
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The reagent (s) which can be used to distinguish acetophenone from be...
I2 and NaOH react with acetophenone (C6H5COCH3) to give yellow ppt. of CHI3 but benzophenone (C6H5COC6H5) does not and hence can be used to distinguish between them. Oxidation of methyl ketones with sodium Hypoiodite (NaOI) or (I2 + NaOH) gives iodoform (CHI3) but not in case of benzophenone.
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The reagent (s) which can be used to distinguish acetophenone from be...
Introduction:
Acetophenone and benzophenone are two different compounds with similar functional groups (ketones). To distinguish between these two compounds, we can use specific reagents that react differently with each compound. Among the given options, option D (I2 and NaOH) is the correct answer. Let's discuss the reason behind this choice.
Explanation:
Iodine (I2) and Sodium Hydroxide (NaOH):
When acetophenone and benzophenone are treated with iodine (I2) in the presence of sodium hydroxide (NaOH), they show different reactions.
- Acetophenone: Acetophenone reacts with iodine and NaOH to form a yellow precipitate of iodoform (CHI3). The reaction involves the formation of a carboxylate ion, which then undergoes further reaction to produce iodoform.
CH3COC6H5 + 3I2 + 4NaOH → CHI3 + CH3COONa + 3NaI + 2H2O
The formation of iodoform confirms the presence of acetophenone.
- Benzophenone: On the other hand, benzophenone does not react with iodine and NaOH. It remains unchanged under these conditions.
Therefore, the reaction of iodine and NaOH can distinguish between acetophenone and benzophenone.
Other reagents:
Let's briefly discuss the other reagents mentioned in the options and why they are not suitable for distinguishing between acetophenone and benzophenone.
- 2,4-Dinitrophenylhydrazine: This reagent is used for the identification of carbonyl compounds, but it does not specifically differentiate between acetophenone and benzophenone.
- Aqueous solution of NaHSO3: This reagent is commonly used for the reduction of carbonyl compounds. It can reduce both acetophenone and benzophenone, but it does not provide a specific distinction between the two.
- Benedict reagent: Benedict reagent is used for the detection of reducing sugars. It is not suitable for distinguishing between acetophenone and benzophenone.
Conclusion:
Among the given options, option D (I2 and NaOH) is the correct reagent for distinguishing between acetophenone and benzophenone. Acetophenone reacts with I2 and NaOH to form iodoform, while benzophenone remains unchanged.
Acetophenone and benzophenone are two different compounds with similar functional groups (ketones). To distinguish between these two compounds, we can use specific reagents that react differently with each compound. Among the given options, option D (I2 and NaOH) is the correct answer. Let's discuss the reason behind this choice.
Explanation:
Iodine (I2) and Sodium Hydroxide (NaOH):
When acetophenone and benzophenone are treated with iodine (I2) in the presence of sodium hydroxide (NaOH), they show different reactions.
- Acetophenone: Acetophenone reacts with iodine and NaOH to form a yellow precipitate of iodoform (CHI3). The reaction involves the formation of a carboxylate ion, which then undergoes further reaction to produce iodoform.
CH3COC6H5 + 3I2 + 4NaOH → CHI3 + CH3COONa + 3NaI + 2H2O
The formation of iodoform confirms the presence of acetophenone.
- Benzophenone: On the other hand, benzophenone does not react with iodine and NaOH. It remains unchanged under these conditions.
Therefore, the reaction of iodine and NaOH can distinguish between acetophenone and benzophenone.
Other reagents:
Let's briefly discuss the other reagents mentioned in the options and why they are not suitable for distinguishing between acetophenone and benzophenone.
- 2,4-Dinitrophenylhydrazine: This reagent is used for the identification of carbonyl compounds, but it does not specifically differentiate between acetophenone and benzophenone.
- Aqueous solution of NaHSO3: This reagent is commonly used for the reduction of carbonyl compounds. It can reduce both acetophenone and benzophenone, but it does not provide a specific distinction between the two.
- Benedict reagent: Benedict reagent is used for the detection of reducing sugars. It is not suitable for distinguishing between acetophenone and benzophenone.
Conclusion:
Among the given options, option D (I2 and NaOH) is the correct reagent for distinguishing between acetophenone and benzophenone. Acetophenone reacts with I2 and NaOH to form iodoform, while benzophenone remains unchanged.
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The reagent (s) which can be used to distinguish acetophenone from benzophenone is (are):a)2,4- Dinitrophenylhydrazineb)Aqueous solution of NaHSO3c)Benedict reagentd)I2 and NaOH.Correct answer is option 'D'. Can you explain this answer?
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