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Q.

Which of the following chemical equations represents a balanced chemical equation?

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a

2Zn + AgNO3 → 2Zn (NO3)2 + Ag

b

BaCl2 + H2SO4 → BaSO4 + 2HCl

c

2NaOH + H2SO4 → Na2SO4 + H2O

d

Al + 3CuCl2 → 2AlCl3 + Cu

answer is C.

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Detailed Solution

In a balanced chemical equation, the number of atoms of all elements present on both sides of the equation must be equal. Among the given equations,
BaCl2 (s)    +   H2SO4 (aq)   →  BaSO4 (aq)   +    2HCl (aq)
is a balanced chemical equation.

The given table shows the number of atoms of all elements present in the given chemical equation.

ElementNumber of atoms in reactantsNumber of atoms in products
Ba11
Cl22
S11
O44
H22

 

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