OXIDATION REDUCTION

Reduction is the ___________ of electrons.

• loss

• gain

• transfer

• share

Tags

NGSS.HS-PS1-7

What is the oxidation number of iodine in KIO₃?

• 5

• 1

• 0

• -1

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

• 5

• 6

• 4

• 2

Which statement is true:

Mg → Mg²⁺ + 2e^–

• Mg gains 2 electrons

• Mg²⁺ loses 2 electron

• Mg loses 1 electron

• Mg loses 2 electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

NGSS.HS-PS1-7

A decrease in oxidation number.

• Oxidation

• combination

• reduction

Substance that oxidizes another substance by accepting its electrons.

• oxidising agent

• reducing agent

• combustion

Which of the following is the balanced half -reaction for the oxidation of Cu to Cu^+2?

• Cu --> Cu⁺²

• Cu + 2 e- --> Cu⁺²

• Cu - 2e- --> Cu⁺²

• Cu --> Cu⁺² + 2 e-

Tags

NGSS.HS-PS1-7

In a redox reaction, the species reduced

• gains electrons and is the oxidizing agent

• loses electrons and is the oxidizing agent

• gains electrons and is the reducing agen

• loses electrons and is the reducing agent

Substance that oxidizes another substance by accepting its electrons.

• oxidation number

• reducing agent

• oxidizing agent

What is the oxidation number assigned to manganese in KMnO₄?

• 7

• 5

• 4

• 0