Question

The chemical equation $BaC{l_2} + N{a_2}S{O_4} \to BaS{O_4} + 2NaCl$ represents the following type of chemical reaction
A.Displacement
B.Combination
C.Decomposition
D.Double-displacement

Answer 1

Hint: Basically a chemical reaction is a reaction in which the bonds are broken within reactant molecules and new bonds are formed with the product molecules in order to form a new substance. In the given reaction, the two compounds are reacting consequently and their anions and cations have switched the places in order to form new products.

Complete step by step answer:
Chemical reactions are seen all around the world. It is basically a process that occurs when two or more molecules interact to form a new product. The compounds that interact to produce new compounds are known as reactants whereas the newly formed compounds are known as products. Now, there are different kinds of chemical reactions. Let’s study each type in detail and determine what kind of reaction is given in the question.
Some of the types are:
1.Displacement reaction- This is a chemical reaction in which a more reactive element displaces a less reactive element from its aqueous salt solution. It is also known as substitution reaction. An example is as shown:
 $Zn + CuS{O_4} \to ZnS{O_4} + Cu$
2.Combination reaction-It is a reaction in which two or more reactants combine to form a single product. For example:
 $2Na + C{l_2} \to 2NaCl$
3.Decomposition reaction-In this type of reaction, a single compound breaks into two or more simpler compounds. It is just the opposite of a combination reaction. An example of this type of reaction is as shown:
 $CaC{O_3} \to CaO + C{O_2}$
4.Double displacement reaction-In this type of reaction, the ions get exchanged between two reactants which further result in the formation of new products. For example:
 $BaC{l_2} + N{a_{}}S{O_4} \to BaS{O_4} + 2NaCl$
Therefore, it is clear that $BaC{l_2} + N{a_{}}S{O_4} \to BaS{O_4} + 2NaCl$ is a double displacement reaction.
Hence, option D is correct.

Note:Always remember that in a chemical change, a new compound is formed whereas in a physical change, the substance changes its state of existence. Moreover, a chemical reaction follows the law of conservation of mass, which states that an atom is neither created nor destroyed but only a new product is formed from the reactants.