A: Hexane and heptane forms ideal solution.
R: `DeltaH,DeltaS and DeltaG` are zero for such type of solution.

Answer

To solve the question regarding the assertion and reason provided, we will analyze both statements step by step.

### Step 1: Understanding the Assertion
The assertion states that hexane and heptane form an ideal solution.

- **Ideal Solution Definition**: An ideal solution is a mixture where the enthalpy of mixing (ΔH) is zero, and the volume change upon mixing (ΔV) is also zero. This means that the interactions between the molecules of the different components are similar to those in the pure components.

### Step 2: Validating the Assertion
Hexane (C6H14) and heptane (C7H16) are both alkanes with similar molecular structures and properties.

- **Conclusion**: Since they have similar properties and molecular interactions, it is correct to say that hexane and heptane form an ideal solution. Thus, the assertion is true.

### Step 3: Understanding the Reason
The reason provided states that ΔH, ΔS, and ΔG are zero for such types of solutions.

- **Analyzing ΔH**: For an ideal solution, the enthalpy change of mixing (ΔH) is indeed zero.
- **Analyzing ΔS**: The entropy change (ΔS) is not necessarily zero; it can be positive due to increased disorder when mixing.
- **Analyzing ΔG**: The Gibbs free energy change (ΔG) is not zero; it is related to the spontaneity of mixing and is typically negative for mixing processes.

### Step 4: Validating the Reason
The statement in the reason is incorrect because:
- While ΔH is zero for ideal solutions, ΔS and ΔG are not necessarily zero.

### Final Conclusion
- **Assertion (A)**: True (hexane and heptane form an ideal solution).
- **Reason (R)**: False (ΔH is zero, but ΔS and ΔG are not zero).

### Summary
The assertion is true, while the reason is false. Therefore, the correct answer would be that the assertion is true, but the reason is not.

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