4Na + O₂ → 2Na₂O is balanced equation.
Hence, Option (B) is correct answer.
The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.
Now check all the options one by one:
Option (A): 2H₂ + O₂ → 4H₂O
Reactant Side Product Side
H = 4 H = 8
O = 2 O = 4
Here number of atoms of H on the reactant side is 4 and number of atom on product side is 8. H atoms are not balanced in this equation. Hence the given equation is not balanced.
Option (B): 4Na + O₂ → 2Na₂O
Reactant Side Product Side
Na = 4 Na = 4
O = 2 O = 2
Here all the atom on reactant side and product side are equal. Hence the given equation is balanced.
Option (C): Fe₂O₃ + H₂ → 2Fe + 3H₂O
Reactant Side Product Side
Fe = 2 Fe = 2
O = 3 O = 3
H = 2 H = 6
Here number of atoms of H on the reactant side is 2 and number of atom on product side is 6. H atoms are not balanced in this equation. Hence the given equation is not balanced.
Option (D): CH₄ + O₂ → CO₂ + H₂O
Reactant Side Product Side
C = 1 C = 1
H = 4 H = 2
O = 2 O = 3
Here H atoms on the reactant and product side is not equal and O atoms are also not equal on the reactant side and product side. Hence, the given equation is not balanced.
Thus from the above conclusion we can say that The balanced equation from the given options is 4Na + O₂ → 2Na₂O
Hence, Option (B) is correct answer.
Disclaimer: The question was given incomplete on the portal. Here is the complete question.
Question: Which of the following equations is balanced?
(A) 2H₂ + O₂ → 4H₂O
(B) 4Na + O₂ → 2Na₂O
(C) Fe₂O₃ + H₂ → 2Fe + 3H₂O
(D) CH₄ + O₂ → CO₂ + H₂O
Learn more about the Balanced Chemical Equation here: https://brainly.com/question/26694427
#SPJ1
