Waec Chemistry 1995 Past Questions and Answers

Question 6:

• WAEC 1995

A WEAK ACID IS ONE WHICH

A. IS NOT CORROSIVE
B. IS SLIGHTLY IONIZIED IN WATER
C. DOES NOT PRODUCE SALTS WITH ALKALIS
D. DOES NOT CONDUCT AN ELECTRIC CURRENT IN AQUEOUS SOLUTION
E. FORMS ACID SALTS WITH BASES

Question 7:

• WAEC 1995

Which of the following species is always present in acidified water?

A. NH⁺₄
B. O ^2-
C. HCI
D. H³O⁺
E. HNO₃

Question 8:

• WAEC 1995

The most suitable method for preparing lead (ll) chloride is by

A. Action of dilute HCI on PbSO ₄
B. Acts of dilute HCI on lead
C. Action of dilute HCI on PbCO₃
D. Bubbling chlorine into a solution of Pb(NO₃)₂
E. Mixing aqueous solutions Pb(NO₃)₂ and NaCI.

Question 9:

• WAEC 1995

A positive brown ring test indicates the presence of

A. NO ₃
B. Fe ³⁺
C. SO ^2-₃
D. CU⁺
E. NO^-₂

Question 10:

• WAEC 1995

Consider the reaction represented by the equation below: XO + YO → X + YO₂ In the reaction, YO acts as

A. An acidic oxide
B. A basic oxide
C. A reducing agent
D. A weak base
E. An oxidizing agent