Question

Define unbalanced equation.
(a) A balanced chemical equation has the number of atoms of each element equal on both sides of the reaction.
(b) Reactants and products have different physical forms.
(c)The number of atoms of each element or molecule in reactants is not equal to the number of atoms of each element present in the product.
(d) Reaction is irreversible.

Answer 1

Hint: Representation of the chemical reaction in the symbolic form is called as the chemical equation. And the chemical equation containing equal no of moles of all the atoms of the reacting species and that of the products is known as the balanced chemical equation and vice -versa.

Complete step by step answer:
First, we should know that what is a chemical equation is. The chemical equation is the representation of the chemical reaction in the symbolic form. The reactants are written on the left hand side and the products are written on the right-hand side and there is an arrow from left to the right symbolizing a complete chemical equation. In this, the reactants and the products are expressed in their chemical formulas. It is a way to represent the chemical equation in an easier and more understandable way. Example: consider the general reaction as:
\[\text{A+B} \to \text{C+D} \]
Here, A and B are the reactants and C and D are the products and the arrow indicates the direction in the chemical reaction occurs.
In this, the chemical equation is said to be balanced, when it has the equal no of atoms of each element on both the sides i.e. on the reactant and the products side.
On the other hand, the chemical equation is said to be unbalanced, when it has the unequal no of atoms of each element on both the sides i.e. on the reactant and the products side and it doesn’t satisfy the law of the conservation of mass.

So, from the above given statements, option (c) is correct.

Note: A chemical equation is based on the law of the conservation of the mass which states that the mass can neither be created nor be destroyed but can be transformed from one form to another i.e. the mass of the reactants should be equal to the mass of the products.