Question

Q— which of the following reactions is not correct according to the law of conservation of mass ?

(a). 2Mg(s) + O2 (g) — 2MgO(s)
(b). 2C2H2 + 5O2 — 4CO2
(c). S(s) + O2(g) — SoO2(g)
(d). CH4(g) + O2(g) — CO2(g) + H2O(g)
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Answer 1

C 3 H 3 (g)+O2 (g)→CO2 (g)+H O(g)

No. of atoms in the reactant side is not equal to the no. of atoms in the product side. Hence, (B) is not a correct reaction.

Answer 2

Answer:

Q— which of the following reactions is not correct according to the law of conservation of mass ?

(a). 2Mg(s) + O2 (g) — 2MgO(s)

(b). 2C2H2 + 5O2 — 4CO2

(c). S(s) + O2(g) — SoO2(g)

(d). CH4(g) + O2(g) — CO2(g) + H2O(g)

→d). CH4(g) + O2(g) — CO2(g) + H2O(g)