Salt (Trial SPM)

Which of the following pairs react to form water and salt only? (Melaka 2020, Q14)

• Dilute sulphuric acid and magnesium

• Dilute hydrochloric acid and calcium carbonate

• Dilute nitric acid and potassium chloride

• Dilute sulphuric acid and sodium hydroxide

Diagram 15 shows a pack of Epsom Salt which is used as a laxative. Which substances cannot be used to prepare Epsom Salt? (SPMRSM 2020, Q45)

• Magnesium chloride with dilute sulphuric acid

• Magnesium oxide with dilute sulphuric acid

• Magnesium carbonate with dilute sulphuric acid

• Magnesium metal with dilute sulphuric acid

Table 5 shows the observation from tests carried out on salt X. What is salt X? (SPMRSM 2020, Q44)

• Aluminium carbonate

• Lead(II) carbonate

• Lead(II) nitrate

• Zinc nitrate

Which salt is prepared using this method? (SBP 2020, Q18)

• Iron (II) nitrate

• Lead (II) carbonate

• Ammonium chloride

• Aluminium sulphate

What are solution J and solution L? (SBP 2020, Q44)

• J: K₂CO₃, L: NaCl

• J: Na₂CO₃, L: NaCl

• J: (NH₄)₂CO₃, L: HCl

• J: ZnCO₃, L: HCl

Which of the following is an insoluble coloured salt? (Johor 2020, Q7)

• Magnesium carbonate

• Copper (II) carbonate

• Lead (II) sulphate

• Silver chloride

Which of the following substances is Q? (SPMRSM 2020, Q31)

• Silver nitrate

• Barium nitrate

• Lead(II) nitrate

• Magnesium nitrate

Diagram shows the heating of lead(II) nitrate. Which of the following observations is correct? (N.Sembilan 2020, Q21)

• a greenish yellow gas with pungent smell is released

• a colourless gas which turns lime water chalky is released

• a residue which is yellow when hot and white when cold is formed.

• a residue which is brown when hot and yellow when cold is formed

5.0 cm3 of 0.5 mol dm-3 sodium sulphate solution was placed into eight different test tubes of the same size. Different volumes of 0.5 mol dm^-3 Z chloride solution was added to each test tube. The mixture was shaken, and the height of the precipitate formed was measured after one hour. The result is shown in Diagram.

What is the empirical formula of the precipitate formed? (Johor 2020, Q46)

• ZSO₄

• Z(SO₄)₂

• Z₂SO₄

• Z₂(SO₄)₃

What is the molarity of sodium hydroxide solution in the store? (N.Sembilan 2020, Q46)

• 8.00 mol dm^-3

• 0.80 mol dm^-3

• 0.04 mol dm^-3

• 0.02 mol dm^-3