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The chemical equation 2 H₂ + O₂ → 2 H₂O is balanced because:
ASame atoms on both sides
BSame molecules on both sides
CHeat is released
DProducts are water only
Answer & Solution
Correct answer: A. Same atoms on both sides
1. Balanced means same number of each TYPE of atom on each side.
2. LHS: 4 H + 2 O. RHS: 2×2 H + 2×1 O = 4 H + 2 O.
3. Mass conservation is satisfied.
_Source: NCERT Class 10 Science Ch 1 §1.1.2 Balancing Chemical Equations_
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