Gun-cotton is obtained when conc. Nitric acid reacts with

Options

A. Glycerine
B. Glycol
C. Cellulose
D. Starch

Answer

To solve the question, "Gun-cotton is obtained when conc. Nitric acid reacts with...", we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**: We know that gun-cotton is a product formed from a chemical reaction. The key reactant mentioned in the question is concentrated nitric acid (HNO3).

2. **Understand the Process**: Gun-cotton is a type of nitrocellulose, which is created through a process known as nitration. Nitration involves the introduction of nitro groups (-NO2) into a compound.

3. **Identify the Other Reactant**: The compound that is nitrated to produce gun-cotton is cellulose. Cellulose is a natural polymer made up of glucose units and is found in the cell walls of plants.

4. **Write the Reaction**: The reaction can be summarized as:
\[ \text{Cellulose} + \text{Concentrated Nitric Acid} \rightarrow \text{Gun-Cotton (Nitrocellulose)} \]

5. **Conclusion**: Therefore, gun-cotton is obtained when concentrated nitric acid reacts with cellulose.

### Final Answer:
Gun-cotton is obtained when concentrated nitric acid reacts with cellulose.

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