In Which Reaction Does the Oxidation Number of Hydrogen Change

question 132

Multiple Choice

In which reaction does the oxidation number of hydrogen change?

• A) CaO (s) + H₂O (l) -Ca(OH)₂ (s)
• B) HCl (aq) + NaOH (aq) -NaCl (aq) + H₂O (l)
• C) 2 Na (s) + 2 H₂O (l) -2 NaOH (aq) + H₂ (g)
• D) 2 HClO₄ (aq) + CaCO₃ (s) -Ca(ClO₄)₂ (aq) + H₂O (l) + CO₂ (g)
• E) SO₂(g) + H₂O (l) -H₂SO₃ (aq)

---

Definitions:

PVIF

Present Value Interest Factor, a factor used to calculate the present value of a sum of money to be received in the future.

Present Value Factors

Numerical factors used in the calculation of the present value of future cash flows, considering the time value of money.

Bond Premium

The amount by which the market price of a bond exceeds its par value, typically occurring when the bond's interest rate is higher than current market rates.

Bond Discount

The difference between the face value of a bond and its selling price when the bond is sold below its face value.