In Which Reaction Does the Oxidation Number of Oxygen Increase

question 67

Multiple Choice

In which reaction does the oxidation number of oxygen increase?

• A)Ba(NO₃)₂ (aq)+ K₂SO₄ (aq)→ BaSO₄ (s)+ 2KNO₃ (aq)
• B)HCl (aq)+ NaOH (aq)→ NaCl (aq)+ H₂O (l)
• C)MgO (s)+ H₂O (l)→ Mg(OH)₂ (s)
• D)2SO₂ (g)+ O₂ (g)→ 2SO₃ (g)
• E)2H₂O (l)→ 2H₂ (g)+ O₂ (g)

---

Definitions:

Standard Deviation

A statistic that measures the dispersion or variability of a set of data points in relation to their mean, indicating how spread out the data points are.

Mean

The average of a set of numbers, calculated by adding all the numbers in a set together and then dividing by the count of those numbers.

Standard Deviation

A calculation that determines the extent of variability or dispersion in a series of values.

Normal Distribution

Normal distribution, also known as Gaussian distribution, is a continuous probability distribution that is symmetrical around the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.