Iso-propyl alcohol `underset(Delta)overset(Al_(2)O_(3))rarrBunderset(H_(2)SO_(4))overset("Conc")rarrCunderset("boil")overset("water")rarrD`. In this reaction D is:

Options

A. Iso - propyl alcohol
B. Propene
C. n - butyl alcohol
D. n - propyl alcohol

Explanation

To solve the problem step by step, we will analyze the reactions involving isopropyl alcohol (C3H8O) and identify the product D formed after the series of reactions.

### Step 1: Identify the starting compound
The starting compound is isopropyl alcohol, which is also known as 2-propanol. Its structure can be represented as:
\[ \text{CH}_3\text{CHOH}\text{CH}_3 \]

### Step 2: Reaction with Al2O3 and heat
When isopropyl alcohol is heated in the presence of aluminum oxide (Al2O3), it undergoes dehydration. This means that a water molecule (H2O) is removed from the alcohol. The reaction can be represented as:
\[ \text{CH}_3\text{CHOH}\text{CH}_3 \xrightarrow{\Delta, \text{Al}_2\text{O}_3} \text{C}_3\text{H}_6 + \text{H}_2\text{O} \]
This results in the formation of propene (C3H6), which is an alkene.

### Step 3: Reaction with concentrated H2SO4
Next, the propene formed reacts with concentrated sulfuric acid (H2SO4). According to Markovnikov's rule, the addition of H2SO4 to the alkene will lead to the formation of an alkyl hydrogen sulfate. The hydrogen from H2SO4 will add to the carbon with more hydrogen atoms, and the bisulfate ion (HSO4-) will add to the other carbon. The reaction can be represented as:
\[ \text{C}_3\text{H}_6 + \text{H}_2\text{SO}_4 \rightarrow \text{C}_3\text{H}_7\text{OSO}_3\text{H} \]
This product is isopropyl hydrogen sulfate.

### Step 4: Hydrolysis with water
When the isopropyl hydrogen sulfate is treated with water (boiling), hydrolysis occurs, resulting in the formation of isopropyl alcohol. The reaction can be represented as:
\[ \text{C}_3\text{H}_7\text{OSO}_3\text{H} + \text{H}_2\text{O} \rightarrow \text{C}_3\text{H}_8\text{O} + \text{H}_2\text{SO}_4 \]
Thus, the final product D is isopropyl alcohol (C3H8O).

### Conclusion
The final product D is isopropyl alcohol, also known as 2-propanol.

### Answer
D is isopropyl alcohol (2-propanol).

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