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CUET
Chemistry
Organic: Alcohols, Phenols and Ethers
A compound (X) containing C,H and O is unreactive towards sodium. It also does not react with Schiff's reagent. On refluxing with an excess of hydroiodic acid, (X) yields only one organic product (Y). On hydrolysis, (Y) yields a new compound (Z) which can be converted into (Y) by reaction with red phosphorus and iodine. The compound (Z) on oxidation with potassium permanganate gives a carboxylic acid. The equivalent weight of the acid is 60. |
What is the name of the compound (Z)? |
methanol ethanol propanol butanol |
ethanol |
The correct answer is option 2. ethanol. Given, A compound X containing C, H and O is not reactive towards sodium, so, it cannot be an acid or an alcohol. The compound X also does not react with Br2 and Schiff's base. So, it cannot be an aldehyde or a ketone. On refluxing with an excess of hydroiodic acid, (\X\) yields only one organic product (Y), so it is a symmetrical ether. The compound (Z) on oxidation with potassium permanganate gives a carboxylic acid and the equivalent weight of the acid is 60. Hence it can be ethanoic acid (atomic weight = 60), which is produced from the compound Z on reaction with KMnO4. So the compound Z is ethanol. Z reacts with I2/P4(red) to give the compound Y whic is ethyl iodidde. From these facts we can identify the compound X as diethyl ether. Thus, the name of the compound Z is ethanol. |