Question

Which of the following reactions is not correct according to
the law of conservation of mass?
(a) 2Mg (s) + O₂ (g) → 2MgO (s)
(b) C₃H₈ (g) + O₂ (g) → CO₂ (g) + H₂O (g)
(c) P₄ (s) + 5O₂ (g) → P₄O₁₀ (s)
(d) CH₄ (g) + 2O₂ (g) → CO₂ (g) + 2H₂O (g)

Answer 1

I think the answer is option C

Answer 2

C₃H₈ (g) + O₂ (g) → CO₂ (g) + H₂O (g) is the correct option.

Explanation:

• The conservation of mass states that the mass can neither be created, nor be destroyed.

• Mass can only be changed from one form to other.

• In these chemical reactions, the mass on the reactant side of the reaction must be equal and similar to the product side.

• In the 1st reaction, there is equal mass on both the side of the reaction.

• In the 2nd reaction, the mass on one side of the reaction is not equal to the other side.

• In 3rd and 4th reaction, the mass on one side of the reaction is equal to that of the other side.

• So the correct option is reaction 2.

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https://brainly.in/question/3381825

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