Methyl orange shows yellow colour in alkaline solutions.

Answer

### Step-by-Step Solution:

1. **Understanding Methyl Orange**:
- Methyl orange is a pH indicator that changes color depending on the acidity or alkalinity of the solution. It is a weak acid and is denoted as MeOH.

2. **Identifying the pH Range**:
- Methyl orange is effective in a pH range of approximately 3 to 5. Within this range, it can change color, which is crucial for its function as an indicator.

3. **Color Change Mechanism**:
- In acidic solutions (pH < 3), methyl orange exists primarily in its protonated form (Me+), which appears red.
- In alkaline solutions (pH > 5), it exists in its deprotonated form (MeOH), which appears yellow.

4. **Equilibrium Dynamics**:
- The equilibrium can be represented as:
\[ \text{MeOH} \rightleftharpoons \text{Me}^+ + \text{OH}^- \]
- In alkaline solutions, the concentration of hydroxide ions (OH-) increases. According to Le Chatelier's principle, the equilibrium will shift to the left to counteract the increase in OH- concentration.

5. **Resulting Color in Alkaline Solutions**:
- As the equilibrium shifts to the left, more of the undissociated methyl orange (MeOH) is formed, leading to a yellow color in the solution.

6. **Conclusion**:
- Therefore, the statement "Methyl orange shows yellow color in alkaline solutions" is correct because the increased concentration of hydroxide ions causes the equilibrium to favor the yellow form of methyl orange.