Answer : The correct option is, Place the coefficient 3 in front of the chlorine molecule.
Explanation :
Balanced chemical reaction : It is defined as the number of atoms of individual elements present on reactant side must be equal to the product side.
The given unbalanced chemical reaction is,
This chemical reaction is an unbalanced reaction because in this reaction, the number of atoms of chlorine molecule are not balanced on both the sides while all the atoms are balanced.
In order to balanced the chemical reaction, the coefficient 3 is put before the
molecule.
Thus, the balanced chemical reaction will be,