A non-metal 'X' is lustrous, insoluble in water but soluble in alcohol, when it reacts with another metallic element 'Y' , it forms a substance 'Z' which are used in cloud seeding or artificial rain. Identify X, Y and Z. What are the advantages of artificial rain? Is there any substances other than Z than Z that can be used for artificial rain? If so, what are they?

Explanation

To solve the question step-by-step, we will identify the non-metal 'X', the metallic element 'Y', and the substance 'Z' used in cloud seeding. Then, we will discuss the advantages of artificial rain and other substances that can also be used for this purpose.

### Step 1: Identify Non-metal 'X'
- The non-metal 'X' is described as lustrous (shiny), insoluble in water, and soluble in alcohol.
- The only non-metal that fits this description is **iodine (I)**.

### Step 2: Identify Metallic Element 'Y'
- The metallic element 'Y' must react with iodine to form a compound used in cloud seeding.
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