Q

Which of the following is a balanced chemical equation?

RRB Group D, 22-Sep-18 S-2 2018
✓ Answer: A 2Mg + O2 → 2MgO
In option (a), both sides of the equation have the same number of atoms: magnesium (Mg) and 2 oxygen (O) atoms on the left side (LHS) are balanced with magnesium (Mg) and 2 oxygen (O) atoms in 2MgO on the right side (RHS). The equation 2Mg + O2 → 2MgO is balanced.
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