A compound which is strong oxidizing angent and has orange coloured crystal. It is used in the preparation of azo compounds. Identify the compound.

Options

A. Hydrogen peroxide
B. potassium permaganate
C. sodium chromate
D. potassium dichromate

Answer

**Step-by-Step Solution:**

1. **Identify the Characteristics of the Compound:**
- The compound is described as a strong oxidizing agent.
- It has orange-colored crystals.
- It is used in the preparation of azo compounds.

2. **Recall Common Strong Oxidizing Agents:**
- Some common strong oxidizing agents include potassium permanganate (KMnO4), potassium dichromate (K2Cr2O7), and nitric acid (HNO3). However, we need to focus on the color and specific usage.

3. **Consider the Color of the Compound:**
- Among the strong oxidizing agents, potassium dichromate (K2Cr2O7) is known to have an orange color in its crystalline form.

4. **Check the Usage in Azo Compound Preparation:**
- Azo compounds are typically prepared through diazotization reactions. Potassium dichromate is often used in various organic synthesis reactions, including those leading to azo compounds.

5. **Conclusion:**
- Based on the characteristics provided in the question, the compound that fits all the criteria is **Potassium Dichromate (K2Cr2O7)**.

**Final Answer: Potassium Dichromate (K2Cr2O7)**

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