Solid ammonium carbamate dissociate to give ammonia and carbon dioxide as follows
`NH_(2)COONH_(4)(s)hArr2NH_(3)(g)+CO_(2)(g)`
which of the following graph correctly represents the equilibrium.

Options

A.
B.
C.
D.

Answer

To solve the question regarding the dissociation of solid ammonium carbamate into ammonia and carbon dioxide, we will analyze the equilibrium process and how it can be represented graphically.

### Step-by-Step Solution:

1. **Understanding the Reaction**:
The reaction given is:
\[ NH_2COONH_4(s) \rightleftharpoons 2NH_3(g) + CO_2(g) \]
Here, solid ammonium carbamate dissociates into gaseous ammonia and carbon dioxide.

2. **Identifying the Phases**:
- Ammonium carbamate is a solid, which means its concentration does not change over time as it does not enter the equilibrium expression.
- Ammonia (NH₃) and carbon dioxide (CO₂) are gases, and their concentrations will change as the reaction progresses.

3. **Graphical Representation**:
- On a graph where the y-axis represents concentration and the x-axis represents time:
- The concentration of solid ammonium carbamate will remain constant (a horizontal line).
- The concentration of ammonia will start at zero and increase until it reaches a constant value at equilibrium.
- The concentration of carbon dioxide will also start at zero and increase until it reaches a constant value at equilibrium.

4. **Drawing the Graph**:
- For ammonium carbamate (solid), draw a horizontal line at a constant concentration.
- For ammonia, draw a curve that starts at zero, rises steeply, and then levels off as it approaches its equilibrium concentration.
- For carbon dioxide, draw a similar curve to ammonia, starting at zero, rising, and then leveling off at its equilibrium concentration.

5. **Identifying the Correct Graph**:
- Among the provided options (graphs A, B, C, D), look for a graph that shows:
- A constant line for the solid (ammonium carbamate).
- An increasing curve for ammonia that levels off.
- An increasing curve for carbon dioxide that also levels off.
- Based on the description, graph C corresponds to this behavior.

### Conclusion:
The correct graph that represents the equilibrium of the dissociation of solid ammonium carbamate into ammonia and carbon dioxide is **Graph C**.

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