Balanced chemical equations imply which of the following?
$I$ . Numbers of molecules are conserved in chemical change
$I I$ . Numbers of atoms are conserved in chemical change.
$I I I$ . Mass is conserved in chemical change.

I

only

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I I

only

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I

and

I I I

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I I

and

I I I

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Solution

The correct option is D $I I$ and $I I I$
Because A balance equation
$F e S O_{4} + Z n ⟶ Z n S O_{4} + F e$
Hence number of atoms are conserved in chemical change and mass is conserved in chemical change.

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