Which of the compound is least soluble in waterAgFAgClAgBrAgI

To determine which compound is least soluble in water, we need to consider the solubility rules for common ionic compounds.

The solubility rules state that most salts containing Group 1 metals (such as Ag+) and nitrate (NO3-) ions are soluble in water. However, there are exceptions for some compounds.

Let's analyze each compound:

1. AgF: According to the solubility rules, fluorides (F-) are generally soluble in water. Therefore, AgF is likely to be soluble.

2. AgCl: Chlorides (Cl-) are also generally soluble in water, but there are exceptions for some compounds. Silver chloride (AgCl) is one of these exceptions and is considered insoluble in water.

3. AgBr: Bromides (Br-) are generally soluble in water, but like AgCl, silver bromide (AgBr) is an exception and is considered insoluble.

4. AgI: Iodides (I-) are generally soluble in water, but once again, silver iodide (AgI) is an exception and is considered insoluble.

Based on the solubility rules and exceptions, we can conclude that AgCl is the least soluble compound in water among the given options.