Chemistry 2004 Waec Past Questions and Answers

Question 11 :

• WAEC 2004

The method of collection of gases prepared in the laboratory depend on their

A. Odour and atomicity
B. Colour and odour
C. Atomicity and density
D. Solubility and density

Question 12 :

• WAEC 2004

Which of the following pairs of salts undergo hydrolysis?

A. AlCI₃ and NH₄CI
B. AICI₃ and NaCI
C. FeCI₃ and KCI
D. Na₂SO₄ and K₂ SO₄

Question 13 :

• WAEC 2004

The alloy used extensively in the building industry is

A. Steel
B. Bronze
C. Duralumin
D. Type metal

Question 14 :

• WAEC 2004

Which of the following salts is not prepared by precipitation?

A. Lead (ll) trioxocarbonate (lV)
B. Barium trioxocarbonate (IV)
C. Sodium trioxocarbnate (IV)
D. Calcium trioxocarbonate (IV)

Question 15 :

• WAEC 2004

What volume of hydrogen would be left over when 300cm³ of oxygen and 1000cm of hydrogen are exploded in a sealed tube? [2H_2(g) + O_2(g) → 2H₂ O_g]

A. 200 cm³
B. 400 cm³
C. 600cm³
D. 700cm³