Year :
2008
Title :
Chemistry
Exam :
NECO - BECE
Paper 1 | Objectives
41 - 42 of 42 Questions
| # | Question | Ans |
|---|---|---|
| 41. |
In which of these groups will all the substances be insoluble in water? A. Na2CO3, KNO3,(NH4)2C03 B. NaHCO3, PbSO4, CaSO4 C. K2C03, CaSO4, AgNO3 D. PbCl2, NaCl, ZnCl2 E. ZnCO3, BaSO4,AgCl |
E |
| 42. |
In which of the following equations can Le-chartelier’s principle be applied? A. H2(g)+S(g) → H2(g) B. 2H2S(g) + O2 (g) → 2H2O(l) + 2SO2(g) C. N2(g) +3H2(g) ⇌ 2NH3(g) D. NaOH(aq) +CO2(g) → Na2CO3(aq) + H2O(l) E. S(s) + 02(g) → SO2(g) Detailed SolutionAccording to Le Chatelier's Principle, this will be favored if you lower the temperature. The system will respond by moving the position of equilibrium to counteract this - in other words by producing more heat. To get as much ammonia as possible in the equilibrium mixture, you need as low a temperature as possible |
| 41. |
In which of these groups will all the substances be insoluble in water? A. Na2CO3, KNO3,(NH4)2C03 B. NaHCO3, PbSO4, CaSO4 C. K2C03, CaSO4, AgNO3 D. PbCl2, NaCl, ZnCl2 E. ZnCO3, BaSO4,AgCl |
E |
| 42. |
In which of the following equations can Le-chartelier’s principle be applied? A. H2(g)+S(g) → H2(g) B. 2H2S(g) + O2 (g) → 2H2O(l) + 2SO2(g) C. N2(g) +3H2(g) ⇌ 2NH3(g) D. NaOH(aq) +CO2(g) → Na2CO3(aq) + H2O(l) E. S(s) + 02(g) → SO2(g) Detailed SolutionAccording to Le Chatelier's Principle, this will be favored if you lower the temperature. The system will respond by moving the position of equilibrium to counteract this - in other words by producing more heat. To get as much ammonia as possible in the equilibrium mixture, you need as low a temperature as possible |