Which of the following reactions is not correct according to the law of conservation of mass
(i) 2Mg(s) + O2(g) → 2MgO(s)
(ii) C3H8(g) + O2(g) → CO2(g) + H2O(g)
(iii) P4(s) + 5O2(g) → P4O10(s)
(iv) CH4(g) + 2O2(g) → CO2(g) + 2H2O (g)
Which of the following reactions is not correct according to the law of conservation of mass
(i) 2Mg(s) + O2(g) → 2MgO(s)
(ii) C3H8(g) + O2(g) → CO2(g) + H2O(g)
(iii) P4(s) + 5O2(g) → P4O10(s)
(iv) CH4(g) + 2O2(g) → CO2(g) + 2H2O (g)
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1 Answer
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This is a Multiple Choice Questions as classified in NCERT Exemplar
Option (B)
In a, c, and d options given reactions, all the elements are balanced and hence, following the law of conservation of mass.
In reaction (B), C3H8+ O2→ CO2+H20 elements are not balanced. Hence product are different. It is against the law of conservation of mass
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