Understanding Oxidation and Reduction Reactions

What does the mnemonic 'OIL RIG' stand for in the context of oxidation and reduction?

• Oxidation is loss of hydrogen, Reduction is gain of oxygen

• Oxidation is loss, Reduction is gain

• Oxidation is gain, Reduction is loss

• Oxidation involves oxygen, Reduction involves hydrogen

In the reaction between sodium and chlorine, what happens to sodium?

• It gains an electron and is reduced

• It loses an electron and is oxidized

• It gains a proton and is oxidized

• It loses a proton and is reduced

Which element is reduced in the reaction between potassium and hydrogen?

• Potassium

• Hydrogen

• Both are reduced

• Neither is reduced

What is the oxidation number of magnesium in magnesium ion?

• +1

• -1

• 0

• +2

According to the 'Hundred Door' mnemonic, what does an increase in oxidation number signify?

• Oxidation

• Both oxidation and reduction

• Reduction

• No change

In the reaction forming carbon dioxide, what happens to the oxidation number of carbon?

• It decreases from 0 to -4

• It increases from 0 to +4

• It remains the same

• It decreases from +4 to 0

In the formation of ammonia, what happens to the oxidation number of nitrogen?

• It increases from 0 to +3

• It decreases from 0 to -3

• It remains the same

• It increases from -3 to 0

What is the oxidation number of oxygen in mercury oxide?

• 0

• -1

• -2

• +2

Why is the traditional definition of reduction as the gain of hydrogen considered confusing?

• It is not scientifically accurate

• It contradicts the definition of oxidation

• It does not apply to all reactions

• It can lead to incorrect conclusions in some reactions

In the reaction where magnesium gains hydrogen, what happens to magnesium?

• It gains electrons

• It is oxidized

• It is reduced

• It remains unchanged