Question

What kind of reaction is represented by $2K + {I_2} \to 2KI$?

Answer 1

This reaction discharges energy as warmth and light, so they are exothermic. An illustration of synthesis reaction is the development of water from hydrogen and oxygen.

Complete step by step answer:
We can define synthesis reaction as a kind of chemical reaction where different reactants consolidate to form a single product.
In the given reaction two moles of potassium and one moles of iodine molecules react together to give potassium iodide as a product. Thus as by the above definition the given reaction is a synthesis reaction.
Some of other reactions are discussed below,
Now we can discuss about the displacement reaction as,
We say one reaction as a displacement reaction when one atom or one or more atoms are displaced by another atom.
The general equation for the displacement reaction is,
$A + B - C \to A - C + B$
Let us see the definition of single displacement reaction first,
A single displacement reaction which is likewise called a single substitution reaction is a sort of oxidation-decrease synthetic reaction when a particle or component moves out of a compound, i.e., one component is supplanted by the other in a compound.
Let’s we see about the combustion reaction as,
A reaction with a burnable material with an oxidizer to give an oxidized item is called a combustion reaction. An oxidizer is a substance a fuel needs to consume, by and large oxygen. Consider the case of burning of magnesium metal.

Note: A synthesis reaction is quite possibly the most essential sorts of response wherein numerous straightforward mixtures join under certain states of being giving out an intricate item. The product will consistently be a compound. Allow us to consider the Synthesis reaction of sodium chloride with reactants strong sodium and chloride gas.