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

A lustrous non-metal which is soluble in alcohol is iodine. It reacts with the metallic element silver to form silver iodide which is used in cloud seeding or artificial rain. So, X is iodine, Y is silver, Z is silver iodide. Artificial rain is very much useful in agriculture at the time of drought or water scarcity. Silver nitrate and dry ice (solid carbon dioxide) can also be used for artificial rain.