Water - Jamb Chemistry Past Questions and Answers

Question 46:

• JAMB 2001

Pure solvents are obtained by

A. Distillation
B. Condensation
C. Extraction
D. Evaporation

Question 47:

• JAMB 2001

The chemical used for coagulation in water purification is

A. Aluminium tetraoxosulphate (VI)
B. Copper tetraoxosulphate (VI)
C. Sodium tetraoxosulphate (VI)
D. Calcium tetraoxosulphate (VI)

Question 48:

• JAMB 2001

Phosphorus is stored under water to prevent it from

A. Dehydrating
B. Becoming inert
C. Smelling
D. Catching fire

Question 49:

• JAMB 2001

A burning candle produces water and

A. Carbon (II) oxide
B. Carbon (IV) oxide
C. Oxygen
D. Hydrogen

Question 50:

• JAMB 2001

When sodium reacts with water, the resulting solution is

A. Weakly acidic
B. Neutral
C. Acidic
D. Alkaline