Waec Chemistry 2001 Past Questions and Answers

Question 41:

• WAEC 2001

What volume of hydrogen will be produced if 100cm³ of ammonia is completely decomposed at constant temperature and pressure? The equation for the reaction is 2NH_3(g) → N_2(g) + 3H_2(g)

A. 50cm³
B. 150cm³
C. 200cm³
D. 300cm³

Question 42:

• WAEC 2001

The gas given off when NH₄Cl is heated with an alkali is

A. H₂
B. CI₂
C. N ₂
D. NH ₃

Question 43:

• WAEC 2001

A major factor coonsidered in selecting a suitable method for preparing a simple salt is its

A. Crystalline form
B. Melting point
C. Reactivity with dilute acids
D. Solubility in water

Question 44:

• WAEC 2001

Which of the following acids forms normal salts only?

A. Tetraoxosulphate (VI) acid
B. Trioxosulphate (IV) acid
C. Tetraoxophosphate (V) acid
D. Trioxonitrate (V) acid

Question 45:

• WAEC 2001

A subtance is said to be hygroscopic if it absorbs

A. Water from the atmosphere to form a solution
B. Heat from the surrounding
C. Carbon (IV) oxide from the atmosphere
D. Moisture from the atmosphere without dissolving