CHEM F4 (ACID, BASE & SALT)

Which of the following chemical equations are suitable to prepare the salt?

• I & II

• I & III

• II & IV

• III & IV

What are the reagents can used to test the presence of cation and anion in salt solution Y?

• Cation : Ammonia solution , Anion : Dilute nitric acid and silver nitrate solutio

• Cation : Sodium hydroxide solution , Anion : Dilute nitric acid and barium nitrate solution

• Cation : Sodium hydroxide solution , Anion : Dilute nitric acid and silver nitrate solution

• Cation : Ammonia solution , Anion : Dilute nitric acid and barium nitrate solution

Which of the following is correct about weak acid solution?

• Partially ionised in water

• Completely ionised in water

• Concentration of the solution is high

• Solution does not react with alkali

Which of the following is a soluble salt?

• Barium sulphate

• Calcium sulphate

• Sodium carbonate

• Magnesium carbonate

What is the yellow precipitate formed when sodium thiosulphate, Na25203 solution reacts with sulphuric acid, H2SO4?

• Sulphur dioxide

• Sodium sulphate

• Sulphur trioxide

• Sulphur

Determine the pH value of a solution of barium hydroxide, Ba(OH) at a concentration of 0.05 mol dm-3.

• 12

• 13

• 12.7

• 3.7

What is solution Y ?

• Hydrochloric acid

• Sodium hydroxide solution

• Ammonia solution

• Sodium chloride solution

Which of the following statement is true about acid X and acid Y?

• Acid X has higher concentration of hydrogen ion than acid Y

• Acid X ionises partially in water while acid Y ionises completely in water

• Acid X reacts with metal carbonate while acid Y does not react with metal carbonate

Based on the conversation in Diagram 11, which of the following substance is suitable to overcame problem faced by the farmer?

• Barium sulphate

• Calcium oxide

• Sodium oxide

What is the molarity of sodium hydroxide solution, NaOH with pH value is 12.0?

• 0.01 mol dm-3

• 0.02 mol dm-3

• 0.03 mol dm-3

• 0.04 mol dm-3