Question

What is a reagent example?

Answer 1

1. Reagents are chemical substances either organic or inorganic, that are used to perform a reaction or to test whether a reaction occurs.
2. It is also used many times to check the presence of any chemical substance based on the type of reaction that follows on being reacted with a reactant.
3. They play a major role in activating chemical reactions and directing the formation of products. These can be individual solids or liquids or can be a solvent that is used to dissolve the reactants.
4. Thus, reagents can be consumed during a reaction but not necessarily always like in the case of catalytic reactions where the catalyst is a reagent that is not consumed during the reaction.
5. 
6. In the given reaction, the reagent ${\mathrm{FeBr}}_3$ is a catalyst and is not consumed during the reaction.
7. Some examples of reagents used in chemical reactions are Grignard's reagent $\left(\mathrm{RMgX}\right)$ - in which $\mathrm{Mg}$ is simultaneously bonded with an alkyl group and a halide atom. It helps in the conversion of aldehydic or ketonic compounds to alcohol.