Question

Which of the following is not a balance equation?
a) Fe+Cl2→→→→→→ FeCl3
b) Mg+CuSO4→→→→→→ MgSO4+Cu
c) NaOH+HCl→→→→→→→ NaCl+H2O
d) Zn+S→→→→→→→ ZnS

Answer 1

Which of the following is not a balance equation?

a) Fe+Cl2→→→→→→ FeCl3

b) Mg+CuSO4→→→→→→ MgSO4+Cu

c) NaOH+HCl→→→→→→→ NaCl+H2O

d) Zn+S→→→→→→→ ZnS

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Option [A]

Fe + Cl2 -----------> FeCl3

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Reason:-

LHS (Left hand side) of equation is not equal to the RHS (Right hand side) of chemical equation according to number of atoms.

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Answer 2

Answer:

The chemical equation: Fe + Cl₂ → FeCl₃ is not balanced.

Therefore, the option (a) is correct.

Explanation:

The chemical reaction between iron and chlorine gas gives ferric chloride as product. The given reaction is:

Fe + Cl₂ $\longrightarrow$ FeCl₃

The number of chlorine atoms are not equal on both sides . Therefore the reaction is not balanced. The balanced chemical reaction is :

2 Fe + 3 Cl₂ $\longrightarrow$  2 FeCl₃

The all other reaction are balanced  because the number of atoms and charge on both sides are equal.

Mg + CuSO₄  $\longrightarrow$  MgSO₄ + Cu

NaOH + HCl  $\longrightarrow$   NaCl + H2O

Zn  +  S  $\longrightarrow$  ZnS

Therefore, the reaction given in the option (a) is only unbalanced reaction among all.