Question

Find the odd one out

• A. Effervescence
• B. Precipitate
• C. Color change
• D. Oxidation

Answer 1

The correct option is D

Oxidation

The explanation for the correct option:

Option (D)

• Oxidation is the process of the addition of oxygen or the removal of hydrogen from a substance.

The explanation for the correct option:

Option (A)

• During certain reactions one of the products formed may be a gas and it bubbles out.
• This is known as effervescence.
• This is a characteristic of some chemical reactions.

Option (B)

• In some reactions, the product may be an insoluble substance that settles at the bottom of the reaction mixture.
• These insoluble substances are known as precipitates.
• This is a characteristic of some chemical reactions.

Option (C)

• The reaction mixture sometimes changes its color and this is considered an indication of the occurrence of a chemical reaction.

Thus, oxidation is a reaction process while others are characteristics of the occurrence of a reaction.