Question

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

Answer 1

Part I - Identifying the element

• Artificial rain is induced by the compound silver iodide$\left(\mathrm{AgI}\right)$ , Hence ‘Z’ is silver iodide
• X is iodine because iodine is water insoluble and soluble in alcohol.
• Y is silver (Ag)

Part II - Advantages of artificial rain and other substance which can be used for cloud seeding

• Artificial rain is helpful for drought area so that vegetation can be done.
• Silver nitrate$\left({\mathrm{AgNO}}_3\right)$ and dry ice can also be used for cloud seeding