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Read the passage given below and answer the following questions:
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 this acid is $60.$
The following questions are multiple choice questions. Choose the most appropriate answer:

1. The compound $(X)$ is an:

1. Acid.
2. Aldehyde.
3. Alcohol.
4. Ether.

2. The $\text{IUPAC}$ name of the acid formed is:

1. Methanoic acid.
2. Ethanoic acid.
3. Propanoic acid.
4. Butanoic acid.

3. Compound $(Y)$ is:

1. Ethyl iodide.
2. Methyl iodide.
3. Propyl iodide.
4. Mixture of $(a)$ and $(b).$

4. Compound $(Z)$ is:

1. Methanol.
2. Ethanol.
3. Propanol.
4. Butanol.

5. Compound $(X)$ on treatment with excess of $Cl_2$ in presence of tight gives:

1. $\propto-$ Chlorodiethyl ether.
2. $\propto,\propto\ '-$ Dichlorodiethyl ether.
3. Perchlorodiethyl ether.
4. None of these.