Dioxane used as a solvent is obtained by distilling ………with…….

Options

A. Glycerol, conc. `H_(2)SO_(4)`
B. Glycerol, conc. `H_(3)PO_(4)`
C. Glycol, conc. `H_(2)SO_(4)`
D. Glycol, conc. `H_(3)PO_(4)`

Explanation

To solve the question regarding the production of dioxane as a solvent, we need to identify the correct reactants involved in the distillation process. Here’s a step-by-step breakdown of the solution:

### Step 1: Identify the compounds involved
Dioxane is a cyclic ether that can be synthesized from glycol. Glycol, specifically ethylene glycol, is a diol with the formula C2H6O2.

**Hint:** Look for compounds that can undergo dehydration to form cyclic structures.

### Step 2: Understand the dehydration process
The formation of dioxane involves the acid-catalyzed dehydration of glycol. This process typically requires a strong acid to facilitate the removal of water (H2O) and promote the formation of the ether linkages.

**Hint:** Strong acids like sulfuric acid or phosphoric acid are commonly used for dehydration reactions.

### Step 3: Determine the acid used
Among the options provided, we need to choose the correct acid that is commonly used for this dehydration process. Concentrated sulfuric acid (H2SO4) is known to be a strong dehydrating agent.

**Hint:** Concentrated sulfuric acid is often used in organic synthesis for dehydration reactions.

### Step 4: Combine the reactants
The correct combination for producing dioxane through distillation is glycol (ethylene glycol) with concentrated sulfuric acid. This combination leads to the dehydration of glycol, resulting in the formation of dioxane.

**Hint:** Look for the combination that includes glycol and a strong acid for dehydration.

### Conclusion
The correct answer to the question is: Dioxane used as a solvent is obtained by distilling **glycol with concentrated H2SO4**.

### Final Answer
**Glycol Concentrated H2SO4**

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