Question 1:

According to the Arrhenius definition, an acid is a substance that:

Explanation: According to the Arrhenius definition, an acid is a substance that donates protons (H+ ions) when dissolved in water.

Question 2:

According to the Bronsted-Lowry definition, an acid is a substance that:

Explanation: According to the Bronsted-Lowry definition, an acid is a substance that donates protons (H+ ions) to another substance in a chemical reaction.

Question 3:

According to the Lewis definition, an acid is a substance that:

Explanation: According to the Lewis definition, an acid is a substance that accepts electron pairs during a chemical reaction.

Question 4:

According to the Arrhenius definition, a base is a substance that:

Explanation: According to the Arrhenius definition, a base is a substance that donates hydroxide ions (OH-) when dissolved in water.

Question 5:

According to the Bronsted-Lowry definition, a base is a substance that:

Explanation: According to the Bronsted-Lowry definition, a base is a substance that accepts protons (H+ ions) from another substance in a chemical reaction.