AN AQUEOUS SOLUTION IS ACIDIC IF

A. its pH value is high

B. it s corrosive

C. it changes the colour of litmus

D. it has a bitter taste

E. it contains more H₃O- than OH-

The following oxides react with water except

A. Na₂O

B. SO₃

C. NO₂

D. CO₂

E. CuO

Which of the following is not a property of trioxonitrate (V) salts?

A. Positive reaction to the brown ring test

B. Ability to dissolve in cold water

C. Decomposition on being strongly heated

D. Production of effervescence with saturated Na₂CO₃ solution

E. Evolution of gas with concentrated H₂SO₄ and copper turnings

Which of the following methods is suitable for the preparation of an insoluble salt?

A. Action of an acid on a metal

B. Double decomposition

C. Neutralisation

D. Action of an acid on a trioxocarbonate (IV)

E. Action of an acid on an oxide

What is the function of sulphur (IV) oxide in the reaction represented by the following equation? SO _2(aq) + 2H₂S_(g) → 3S _(s) + 2H ₂O _(l)

A. Dehydrating agent

B. Oxidising agent

C. Bleaching agent

D. Acid

E. Precipitant

Which of the following will produce oxygen and hydrogen during its electrolysis using platinum electrode?

A. Glucose solution

B. Aqueous copper (ll) tetraoxosulphate (IV)

C. Dilute sodium chloride solution

D. Concentrated hydrochloric acid

E. Dilute copper (ll) chloride solution