The chemical equation doesn't change if all its coefficients are multiplied by a common natural number.
True
The statement 'The Chemical equation doesn't change if all its coefficients are multiplied by a common natural number' is true.
Example: Consider the following equations which has the coefficients of Zn, HCl, ZnCl2 and H2 respectively as 1, 2, 1, and 1 respectively.
Zn+2HCl→ZnCl2+H2
If we multiply all the coefficients by a number 3, the equation remains balanced.
3Zn+6HCl→3ZnCl2+3H2
The chemical reaction doesn't change, only the molecules involved in the reaction increase by three times.