Answer : The correct option is, (b) balanced
Explanation:
Law of conservation of mass : It states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form.
The balanced chemical reaction always follow the law of conservation of mass.
Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.
For example: The chemical reaction is,
This reaction is a balanced chemical reaction in which number of atoms of hydrogen and oxygen are equal on the both side of the reaction. So, this reaction obey the law of conservation of mass.
Acid-base reaction : It is a reaction in which an acid react with a base to give salt and water as a product.
Spontaneous reaction : It is a reaction that favors the formation of products at the given set of conditions.
Non-spontaneous reaction : It is a reaction that does not favor the formation of products at the given set of conditions.
Hence, The correct option is, (b) balanced