alleryStart learning →Which of the following is correctly balanced?
AH2 + 2 O2 -> 2 H2O in this form
BH2 + O2 -> H2O in this form
C2 H2 + O2 -> 2 H2O
D3 H2 + O2 -> 2 H2O in this form
Answer & Solution
Correct answer: C. 2 H2 + O2 -> 2 H2O
1. Balanced means equal atoms of each element on both sides.
2. Left: 4 H and 2 O. Right: 4 H and 2 O. Match.
3. Other options have unequal counts of H or O.
4. So option A is correctly balanced.
_Source: Selina Concise Chemistry Class 9, Ch 4 The Language of Chemistry (Mistral OCR'd PDF), section on balancing equations_
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