ACID& BASE

Choose the incorrect statement regarding acetic acid, CH₃COOH.

• It ionizes completely in aqueous solution.

• It changes the litmus paper from blue to red.

• It has a pH value closer to 7.

• It releases hydrogen ions, H⁺, when it dissociates.

Select the products obtained when sulphuric acid, H₂SO₄, reacts with sodium hydroxide, NaOH.

• acid and base

• Water and oxygen

• Carbon dioxide and salt

• Salt and water

In an acid-base titration, an indicator is often added to show the end point during neutralization. Choose an example of an indicator

• Palladium

• Platinum

• Phenol red

• Potassium permanganate

Select the correct physical properties of an acid

• They are bitter in taste

• Change the colour of the litmus paper from red to blue

• Change the colour of the litmus paper from blue to red

• Feel slippery or soapy

Find the CORRECT statement related to the degree of ionization of an acid or base.

• The greater the degree of ionization of the base, the higher the amount of OH ion produced in the solution

• The greater the degree of ionization of an acid, the lower the amount of H⁺ ion produced in the solution

• The greater the degree of ionization of the base, the lesser the strength of the base

• The greater the degree of ionization of acid, the lesser the strength of acid

The percentage of dissociation of aqueous sodium hydroxide, NaOH, is less than 100%.

• TRUE

• FALSE

Phosphoric acid is an example of diprotic acid

• TRUE

• FALSE

A strong acid will have a pH value closer to 7

• TRUE

• FALSE

Salt and water are obtained when an acid reacts with a base.

• TRUE

• FALSE

The double arrow pointing towards ions indicates partial ionization of an acid.

• TRUE

• FALSE