Multiple Choice
In which reaction does the oxidation number of hydrogen change?
A) HCl (aq) + NaOH (aq) → NaCl (aq) + H2O (l)
B) 2Na (s) + 2H2O (l) → 2NaOH (aq) + H2 (g)
C) CaO (s) + H2O (l) → Ca(OH) 2 (s)
D) 2HClO4 (aq) + CaCO3 (s) → Ca(ClO4) 2 (aq) + H2O (l) + CO2 (g)
E) SO2 (g) + H2O (l) → H2SO3 (aq)
Correct Answer:
Verified
Correct Answer:
Verified
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