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Q.

Which of the following is a balanced chemical equation? $Pb {({NO}_{3})}_{2} \to PbO + {NO}_{2} + O_{2}$ is _______.

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a

$Pb {({NO}_{3})}_{2} \to 2 PbO + 4 {NO}_{2} + O_{2}$

b

$2Pb {({NO}_{3})}_{2} \to 2 PbO + {NO}_{2} + O_{2}$

c

$Pb {({NO}_{3})}_{2} \to 2 PbO + {NO}_{2} + O_{2}$

d

$2Pb {({NO}_{3})}_{2} \to 2 PbO + 4 {NO}_{2} + O_{2}$

answer is D.

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Detailed Solution

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The number of atoms on the reactant side and the product side must be equal in a balanced chemical equation.
A standard balanced chemical equation must also contain the least possible whole number coefficients.
The balanced chemical equation out of the given 4 options is: 2 Pb(NO₃)₂→ 2PbO + 4NO₂ + O₂

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