Waec Chemistry 2003 Past Questions and Answers

Question 6:

• WAEC 2003

Which of the following quantities is the same for one mole of Br_2(l) and one mole of He_(g)?

A. Number of molecules
B. Number of atoms
C. Total mass of the particles
D. Volume occupied at s.t.p

Question 7:

• WAEC 2003

Which of the following acids is dibasic?

A. Hydrochloric acid
B. Trioxosulphate (IV) acid
C. Dioxonitrate (lll) acid
D. Ethanoic acid

Question 8:

• WAEC 2003

Bees inject an acidic substance when they sting. Which of the following chemical could be used to treat bee stings?

A. CH₃COOH
B. NaHCO₃
C. C₂H₅OH
D. H₂O₂

Question 9:

• WAEC 2003

Which of the following salts can be prepared by reacting the metal with dilute H₂SO₄?

A. CuSO₄
B. MgSO₄
C. BaSO₄
D. PbSO₄

Question 10:

• WAEC 2003

Which of the following solutions will give a precipitate with dilute tetraoxosulphate (V) acid? l. Lead (ll) trioxonitrate (V) solution ll. Barium chloride solution lll. Sodium chloride solution

A. L only
B. Ll only
C. L and ll only
D. Ll and lll only