Year :
1995
Title :
Chemistry
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
1 - 10 of 29 Questions
| # | Question | Ans |
|---|---|---|
| 1. |
If a solid has a low melting point and dissolves readily in benzene, it would probably A. contain strong electrostatic forces of attraction B. conduct electricity in the molten state C. dissolve in water D. have covalent bonding E. absorb moisture on exposure to air |
D |
| 2. |
Which of the following molecules is linear in shape? A. CH4 B. H2O C. NH3 D. H2S E. CI2 |
E |
| 3. |
Which of the following cannot be deduced from the electronic configuration of a transition metal? A. Possession of magnetic property B. Ability to form complex ions C. Position in the Periodic Table D. Variable oxidation states E. Physical properties of the metal |
A |
| 4. |
What is the percentage by mass of copper in copper in copper (l) oxide (CU2O)? [O = 16; CU =64] A. 88.9% B. 80.0% C. 66.7% D. 20.0% E. 11.1% |
A |
| 5. |
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 |
B |
| 6. |
Which of the following species is always present in acidified water? A. NH+4 B. O 2- C. HCI D. H3O+ E. HNO3 |
D |
| 7. |
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. |
E |
| 8. |
A positive brown ring test indicates the presence of A. NO 3 B. Fe 3+ C. SO 2-3 D. CU+ E. NO- 2 Detailed SolutionBrown ring test is used for the detection of nitrate ions in a solution. As the name suggests it detects presence of nitrate ions by formation of brown ring |
|
| 9. |
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 |
C |
| 10. |
Alums are classified as A. simple salt B. acid salts C. anhydrous salts D. double salts E. basic salts |
D |
| 1. |
If a solid has a low melting point and dissolves readily in benzene, it would probably A. contain strong electrostatic forces of attraction B. conduct electricity in the molten state C. dissolve in water D. have covalent bonding E. absorb moisture on exposure to air |
D |
| 2. |
Which of the following molecules is linear in shape? A. CH4 B. H2O C. NH3 D. H2S E. CI2 |
E |
| 3. |
Which of the following cannot be deduced from the electronic configuration of a transition metal? A. Possession of magnetic property B. Ability to form complex ions C. Position in the Periodic Table D. Variable oxidation states E. Physical properties of the metal |
A |
| 4. |
What is the percentage by mass of copper in copper in copper (l) oxide (CU2O)? [O = 16; CU =64] A. 88.9% B. 80.0% C. 66.7% D. 20.0% E. 11.1% |
A |
| 5. |
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 |
B |
| 6. |
Which of the following species is always present in acidified water? A. NH+4 B. O 2- C. HCI D. H3O+ E. HNO3 |
D |
| 7. |
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. |
E |
| 8. |
A positive brown ring test indicates the presence of A. NO 3 B. Fe 3+ C. SO 2-3 D. CU+ E. NO- 2 Detailed SolutionBrown ring test is used for the detection of nitrate ions in a solution. As the name suggests it detects presence of nitrate ions by formation of brown ring |
|
| 9. |
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 |
C |
| 10. |
Alums are classified as A. simple salt B. acid salts C. anhydrous salts D. double salts E. basic salts |
D |