Which of the following is an example of precipitation reaction?Group of answer choicesDissolving sugar in waterBoiling silver chloride in waterMixing silver nitrate and sodium chloride solutionsBurning wood in air

The example of a precipitation reaction from the given choices is "Mixing silver nitrate and sodium chloride solutions".

Here's the step by step explanation:

1. A precipitation reaction refers to a chemical reaction in which two soluble salts in aqueous solution combine to form an insoluble salt, the precipitate.

2. When silver nitrate (AgNO3) solution is mixed with sodium chloride (NaCl) solution, a chemical reaction occurs.

3. The reaction is: AgNO3(aq) + NaCl(aq) -> AgCl(s) + NaNO3(aq)

4. In this reaction, silver chloride (AgCl) is the precipitate that forms, which is an insoluble salt.

5. Therefore, mixing silver nitrate and sodium chloride solutions is an example of a precipitation reaction.

The other options (dissolving sugar in water, boiling silver chloride in water, burning wood in air) do not result in the formation of a precipitate, so they are not examples of precipitation reactions.