Year :
1989
Title :
Chemistry
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
31 - 33 of 33 Questions
| # | Question | Ans |
|---|---|---|
| 31. |
50cm 3 of a saturated solution of potassium trioxonitrate (V)at 40°C contains 5.05g of the salt. What is the solubility of potassium trioxonitrate (V) at 40°C? (KNO3 = 101) A. 1.0 mol dm-3 B. 1.5 mol dm-3 C. 2.0 mol dm-3 D. 2.5mol dm-3 E. 5.0mol dm-3 |
A |
| 32. |
The oxidation number of chlorine is + 1 in A. KCIO 3 B. CI 2O 7 C. ZnCI2 D. HCI E. NaCIO |
E |
| 33. |
What is the voltage of the cell represented at Zn(s) Zn 2+(aq) /Cu2+(aq) /Cu(s) given that for Cu 2+(aq)/ Cu (s) Eo = 0.337V and for Zn2+(aq) /Zn(s)' E o = -0.763V? A. +0.426V B. -0.426V C. -0.337V D. -1.10V E. +1.10V |
E |
| 31. |
50cm 3 of a saturated solution of potassium trioxonitrate (V)at 40°C contains 5.05g of the salt. What is the solubility of potassium trioxonitrate (V) at 40°C? (KNO3 = 101) A. 1.0 mol dm-3 B. 1.5 mol dm-3 C. 2.0 mol dm-3 D. 2.5mol dm-3 E. 5.0mol dm-3 |
A |
| 32. |
The oxidation number of chlorine is + 1 in A. KCIO 3 B. CI 2O 7 C. ZnCI2 D. HCI E. NaCIO |
E |
| 33. |
What is the voltage of the cell represented at Zn(s) Zn 2+(aq) /Cu2+(aq) /Cu(s) given that for Cu 2+(aq)/ Cu (s) Eo = 0.337V and for Zn2+(aq) /Zn(s)' E o = -0.763V? A. +0.426V B. -0.426V C. -0.337V D. -1.10V E. +1.10V |
E |