y12 redox

What is the oxidation number of chlorine in HClO?

• 0

• -1

• +1

• +5

What is the oxidation number of nitrogen in N₂?

• -3

• 0

• +4

• -1

The sum of the oxidation numbers in SCN^- is equivalent to

• 0

• -1

• +1

• +3

What is the oxidation number of iodine in KIO₃?

• 0

• -1

• +5

• +1

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Determine the oxidation number of chromate in CrO₄^2-.

• +6

• 0

• +2

• +3

Which of the following represents oxidation?

• C → CH₄

• Fe³⁺ → Fe²⁺

• Cl₂ → 2Cl^-

• Zn → ZnO

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which statement is true:
Mg → Mg²⁺ + 2e^–

• Mg gains 2 electrons
• Mg_²⁺ loses 2 electrons
• Mg loses 1 electron
• Mg loses 2 electrons

Tags

NGSS.HS-PS1-2

Which of the following half reactions correctly represents a reduction half reaction?

• Fe →Fe²⁺ + 2e^-
• Pb⁴⁺ + 2e^- →Pb²⁺
• 2O^-2 →O₂ + 4e^-
• Fe + 3e^- →Fe³⁺

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is oxidation number of O in O₂ ?

• 0
• -2
• +1
• +2

What is oxidation number of Cr in Cr₂O_7^2-?

• -2
• +2
• +6
• +12

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2