Which of the following reactions isnot correct according to the law of conservation of mass?

Options

A. `2Mg(s)+O_(2)(g) rarr 2MgO(s)`
B. `C_(3)H_(8)(g)+O_(2) rarr CO_(2)(g)+H_(2)O(g)`
C. `P_(4)(s) +5O_(2)(g)rarr P_(4)O_(10)(s)`
D. `CH_(4)(g)+2O_(2) (g) rarr CO_(2)(g) +2H_(2)O(g)`

Answer

B

Explanation

Mass of reactants = mass of prodcust
`{:(C_(3)H_(8)+,O_(2)rarr,CO_(2)+,H_(2)O),(44g,32g,44g,18g),(,76ne,62g,):}`