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The number of the given compounds, which...

The number of the given compounds, which can form iodoform with alkali and iodine Diethyl ketone, Acetone, Ethyl chloride, Catechol, Resorcinol, Isopropyl alcohol, Acetophenone, Butanone, Laactic acid (`{:(COOH),("|"),(CH-OH),("|"),(CH_(3)):}`) and salicylic acid.

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To determine the number of compounds that can form iodoform with alkali and iodine from the given list, we need to identify which compounds contain the necessary functional groups. The iodoform test is positive for compounds that have either a methyl ketone (RCOCH3) or a secondary alcohol that can be oxidized to a methyl ketone. ### Step-by-Step Solution: 1. **Identify the Compounds**: The compounds given are: - Diethyl ketone - Acetone - Ethyl chloride - Catechol - Resorcinol - Isopropyl alcohol - Acetophenone - Butanone - Lactic acid - Salicylic acid 2. **Check Each Compound**: - **Diethyl ketone (C2H5COC2H5)**: Does not have a methyl group adjacent to the carbonyl (C=O). **Does not form iodoform**. - **Acetone (CH3COCH3)**: Has a methyl group adjacent to the carbonyl. **Forms iodoform**. - **Ethyl chloride (C2H5Cl)**: Does not have a carbonyl or alcohol group. **Does not form iodoform**. - **Catechol (C6H4(OH)2)**: Does not have a methyl ketone or can be oxidized to one. **Does not form iodoform**. - **Resorcinol (C6H4(OH)2)**: Similar to catechol, does not have the required structure. **Does not form iodoform**. - **Isopropyl alcohol (CH3CHOHCH3)**: Can be oxidized to acetone (a methyl ketone). **Forms iodoform**. - **Acetophenone (C6H5COCH3)**: Has a methyl group adjacent to the carbonyl. **Forms iodoform**. - **Butanone (CH3COCH2CH3)**: Has a methyl group adjacent to the carbonyl. **Forms iodoform**. - **Lactic acid (C3H6O3)**: Contains a hydroxyl group adjacent to a carbonyl (can be oxidized to acetone). **Forms iodoform**. - **Salicylic acid (C7H6O3)**: Does not have the required methyl ketone or secondary alcohol structure. **Does not form iodoform**. 3. **Count the Positive Results**: The compounds that can form iodoform are: - Acetone - Isopropyl alcohol - Acetophenone - Butanone - Lactic acid Thus, the total number of compounds that can form iodoform is **5**. ### Final Answer: **5 compounds can form iodoform with alkali and iodine.**
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