Acids quiz (with PDF)

Which of the following is a weak acid?

• Hydrochloric acid (HCl)

• Sulfuric acid (H₂SO₄)

• Nitric acid (HNO₃)

• Ethanoic acid (CH₃COOH)

What happens when a strong acid is dissolved in water?

• It slightly dissociates

• It completely dissociates

• It forms a base

• It remains unchanged

What is formed when an acid reacts with a base according to the neutralisation reaction?

According to the Brønsted-Lowry definition, a base is a proton (H+) ___.

• Donor

• Receiver

• Neutralizer

• Acceptor

What is the observation when an acid reacts with a carbonate?

• Precipitation

• Color change

• Effervescence due to CO₂ gas evolved

• Temperature decrease

Which of the following is a common base?

• Sodium hydroxide (NaOH)

• Hydrochloric acid (HCl)

• Ethanoic acid (CH₃COOH)

• Carbon dioxide (CO₂)

What is the purpose of adding a few drops of indicator in a titration?

• To neutralize the acid and base

• To observe the color change at the end point

• To increase the volume of the solution

• To clean the equipment

Which of the following is not a correct endpoint color change for the given indicator during a titration?

• Phenolphthalein (alkali to acid): pink to colorless

• Methyl orange (alkali to acid): yellow to red

• Methyl orange (acid to alkali): red to yellow

• Phenolphthalein (acid to alkali): colorless to pink

Why is a white tile used during a titration?

• To prevent the flask from breaking

• To measure the volume of acid added

• To help observe the color change

• To mix the reagents more effectively

What is the criterion for titration results to be considered concordant?

• If 2 or 3 values are within 0.10cm³

• If 2 or 3 values are within 1.00cm³

• If all values are exactly the same

• If the values are within 0.05cm³