Acids and Bases Quiz

Which of the following is not classified as a base?

• Calcium hydroxide

• Ammonium hydroxide

• Potassium hydroxide

• Sulfuric acid

Arrange these solutions in increasing pH value:

a) Soap solution
b) Vinegar
c) Lemon juice
d) Baking soda solution

• c < b < d < a

• b < c < a < d

• a < d < b < c

• d < a < c < b

Assertion (A): Acids turn blue litmus paper red. Reason (R): Acids increase the OH⁻ ion concentration in solution.

• Both A and R are true, and R is the correct explanation of A

• Both A and R are true, but R is not the correct explanation

• A is true, R is false

• A is false, R is true

You accidentally spill dilute hydrochloric acid on your hand. What should you do immediately?

• Wipe it with a towel

• Wash with soap and water

• Rinse with plenty of water

• Neutralize with baking soda paste first

Which combination will result in salt and water being formed?

• Acid + Base

• Acid + Metal

• Acid + Carbonate

• Acid + Acid

Acid: Sour taste :: Base : ?

• Salty

• Bitter

• Sweet

• Metallic

A student adds a few drops of phenolphthalein to a colorless solution and observes it turns pink. What can you infer?

• The solution is acidic

• The solution is neutral

• The solution is basic

• Phenolphthalein is not working

Why is toothpaste slightly basic in nature?

• To make teeth white

• To neutralize mouth acids

• To soften food particles

• To react with fluoride

Why is lime (calcium hydroxide) often added to acidic soil?

• To make it fertile instantly

• To kill pests

• To neutralize the acidity

• To increase water retention

A graph shows three solutions with pH values 2, 7, and 12. Which solution could be soap solution?

• pH 2

• pH 7

• pH 12

• pH 5