Which one of the following characteristics is not correct for physical adsorption?

Options

A. Adsorption on solids is reversible
B. Adsorption increases with increase in temperature
C. Adsorption is spontaneous
D. Both enthalpy and entropy of adsorption are negative

Explanation

To determine which characteristic is not correct for physical adsorption, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding Physical Adsorption**:
- Physical adsorption, also known as physisorption, occurs when molecules adhere to a surface through weak Van der Waals forces. This type of adsorption is characterized by its weak and non-specific nature.

2. **Analyzing Each Option**:
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