State whether the following statements are true or false :
Indicator is a substance which shows different colours in acidic and basic solutions.

Answer

**Step-by-Step Solution:**

1. **Understanding the Definition of an Indicator:**
- An indicator is a substance that changes color when it comes into contact with an acid or a base. This property allows indicators to signal whether a solution is acidic, basic, or neutral.

2. **Examples of Indicators:**
- Common indicators include litmus paper and methyl orange.
- Litmus paper turns red in acidic solutions and blue in basic solutions.
- Methyl orange turns red in acidic solutions and yellow in basic solutions.

3. **Color Change in Different Solutions:**
- In acidic solutions, indicators typically show a color change that signifies acidity (e.g., blue litmus turns red).
- In basic solutions, indicators will show a different color (e.g., red litmus turns blue).
- Neutral solutions (like distilled water) do not cause a color change in these indicators.

4. **Conclusion:**
- Since indicators do show different colors in acidic and basic solutions, the statement "Indicator is a substance which shows different colours in acidic and basic solutions" is indeed true.

**Final Answer:**
- The statement is **True**.

---