Get Answers to all your Questions

header-bg qa

Which of the following reactions is not correct according to the law of conservation of mass.

(i)2Mg(s) + O_{2} (g) \rightarrow 2MgO(s)

(ii) C_{2} H_{8} (g) + O_{2} (g) \rightarrow CO_{2} (g) + H_{2}O(g)

(iii) P_{4}(s) + 5O_{2}(g) \rightarrow P_{4}O_{10}(s)

(iv) CH_{4}(g) + 2O_{2}(g) \rightarrow CO_{2}(g) + 2H_{2}O(g)


Answers (1)

The answer is the option (ii) C_{2} H_{8} (g) + O_{2} (g) \rightarrow CO_{2} (g) + H_{2}O(g)


Again, following the Law of energy, the number of atoms on the reactant side should be equal to the product side. Option (ii) does not follow the rule.

Posted by


View full answer