Question

Which of the following is the best example of law of conservation of mass?

[n and m are the masses of reactants and p and q are the masses of products formed.]

• A. $n-m=p-q$
• B. $n+m=p+q$
• C. $n=m$
• D. $p=q$

Answer 1

The correct option is B $n+m=p+q$

Law of conservation of mass:- Mass is neither created nor destroyed it just from one compound to other.

$n+m\to$ $p+q$

Hence, the mass of reactants is equal to the mass of products formed.

Option $B$ is correct.