Year :
1997
Title :
Chemistry
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
41 - 48 of 48 Questions
| # | Question | Ans |
|---|---|---|
| 41. |
Element X, with electronic configuration 2, 8, 2 and element Y with electronic configuration 2, 8, 7 are like to combine by A. metallic bonding B. covalent bonding C. electrovalent bonding D. dative bonding E. hydrogen bonding |
C |
| 42. |
The valence electrons of element 12Mg are in the A. 1s orbital B. 2s orbital C. 2px orbital D. 2py orbital E. 3s orbital |
E |
| 43. |
Which of the following statements is correct about sodium chloride in the solid state? A. it exists as aggregates of ions B. it conducts electricity C. its melting point is below 100oC D. it exists as discrete molecules E. its ions are linked by metallic bonds |
D |
| 44. |
Which of the following Group 1 elements has the highest ionization energy? A. 55Cs B. 37Rb C. 19K D. 11Na E. 3Li |
E |
| 45. |
Boyle's law can be expressed mathematically as A. V \(\alpha\) T (P constant) B. P \(\alpha\) V (T constant) C. P \(\alpha\) T D. V \(\alpha\) 1 / p(T constant) E. V1/T1 = |
D |
| 46. |
What volume of oxygen at s.t.p would react with carbon to form 4.40g of CO2 according to the following equation? C(s) + O2(g) → CO2(g) [O = 16; C =12; 1 mole of a gas occupies 22.4dm3 at s.t.p] A. 0.224dm3 B. 2.24dm3 C. 4.40dm3 D. 4.48dm3 E. 22.4dm3 Detailed SolutionFrom the equation, C + O2 → CO2 : 22.dm3 of oxygen is required to form 44g of CO2 the volume of O2 required to produce 4.4gm is x, :. x = 44/44 X 22.4dm3 |
|
| 47. |
A mixture of NaCI(s) and CaCO3(s) is best separated by A. dissolution followed by filtration B. sublimation followed by crystallization C. dissolution followed by evaporation D. dissolution followed by crystallization E. sublimation followed by dissolution |
A |
| 48. |
What is the basicity of the acid in the followed reaction? NaCO + 2CHCOOH → 2CH COONa + H2O + CO2 A. 1 B. 2 C. 3 D. 4 E. 8 |
A |
| 41. |
Element X, with electronic configuration 2, 8, 2 and element Y with electronic configuration 2, 8, 7 are like to combine by A. metallic bonding B. covalent bonding C. electrovalent bonding D. dative bonding E. hydrogen bonding |
C |
| 42. |
The valence electrons of element 12Mg are in the A. 1s orbital B. 2s orbital C. 2px orbital D. 2py orbital E. 3s orbital |
E |
| 43. |
Which of the following statements is correct about sodium chloride in the solid state? A. it exists as aggregates of ions B. it conducts electricity C. its melting point is below 100oC D. it exists as discrete molecules E. its ions are linked by metallic bonds |
D |
| 44. |
Which of the following Group 1 elements has the highest ionization energy? A. 55Cs B. 37Rb C. 19K D. 11Na E. 3Li |
E |
| 45. |
Boyle's law can be expressed mathematically as A. V \(\alpha\) T (P constant) B. P \(\alpha\) V (T constant) C. P \(\alpha\) T D. V \(\alpha\) 1 / p(T constant) E. V1/T1 = |
D |
| 46. |
What volume of oxygen at s.t.p would react with carbon to form 4.40g of CO2 according to the following equation? C(s) + O2(g) → CO2(g) [O = 16; C =12; 1 mole of a gas occupies 22.4dm3 at s.t.p] A. 0.224dm3 B. 2.24dm3 C. 4.40dm3 D. 4.48dm3 E. 22.4dm3 Detailed SolutionFrom the equation, C + O2 → CO2 : 22.dm3 of oxygen is required to form 44g of CO2 the volume of O2 required to produce 4.4gm is x, :. x = 44/44 X 22.4dm3 |
|
| 47. |
A mixture of NaCI(s) and CaCO3(s) is best separated by A. dissolution followed by filtration B. sublimation followed by crystallization C. dissolution followed by evaporation D. dissolution followed by crystallization E. sublimation followed by dissolution |
A |
| 48. |
What is the basicity of the acid in the followed reaction? NaCO + 2CHCOOH → 2CH COONa + H2O + CO2 A. 1 B. 2 C. 3 D. 4 E. 8 |
A |