Which of the following statement is incorrect.
(i) Entropy is measure of disorder.
(ii) Entropy is not a state function.
(iii) Entropy is expressed in the units of J/K/mol.
(iv) The spontaneous process always accompanies the decrease in free energy.

Explanation

To determine which statement is incorrect among the given options, we will analyze each statement one by one.

### Step 1: Analyze Statement (i)
**Statement:** "Entropy is a measure of disorder."
- **Explanation:** Entropy is indeed a measure of disorder or randomness in a system. It quantifies the number of microscopic configurations that correspond to a thermodynamic system's macroscopic state. Therefore, this statement is **correct**.

### Step 2: Analyze Statement (ii)
**Statement:** "Entropy is not a state function."
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