Freundlich adsorption isotherm is

Options

A. `x/m=kp^(1//r)`
B. `x=mk^(1)`
C. `x//m^(T)`
D. All of these

Explanation

### Step-by-Step Solution:

1. **Understanding the Concept of Adsorption Isotherm**:
- An adsorption isotherm describes how the amount of adsorbate (substance being adsorbed) on the adsorbent (surface on which adsorption occurs) varies with pressure at a constant temperature.

2. **Introduction to Freundlich Adsorption Isotherm**:
- The Freundlich isotherm is one of the earliest and most commonly used models to describe adsorption. It was proposed by Herbert Freundlich in 1909.

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