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Chemistry Past Questions

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156

C(s) + 2S(g) → CS\(_2\)(g)
ΔH = +89 kJ mol-1
The chemical equation above implies that

  • A. each of carbon and sulphur has 89 kJ of energy
  • B. both carbon and sulphur contribute 89 kJ of energy
  • C. 89 kJ of energy is released
  • D. 89 kJ of energy is absorbed
View Answer & Discuss (9) JAMB 2001
157

2SO\(_2\)(g) + O\(_2\)(g) ↔ 2SO\(_3\)(g)
ΔH = -189 kJ mol-1
The equilibrium constant for the reaction above is increased by?

  • A. decreasing the temperature of the system
  • B. decrease the pressure of the system
  • C. The addition of a catalyst to the system
  • D. Increasing the surface area of the vessel
View Answer & Discuss (20) JAMB 2001
158

3Cu(s) + 8HNO\(_3\)(aq)  → 3Cu(NO\(_3\))\(_2\)(aq) + 4H\(_2\)O(l) + 2NO(g)
In the equation above, copper is

  • A. an electron acceptor
  • B. a base
  • C. an oxidizing agent
  • D. a reducing agent
View Answer & Discuss (18) JAMB 2001
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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159

When ΔH is negative, a reaction is said to be

  • A. ionic
  • B. reversible
  • C. exothermic
  • D. endothermic
View Answer & Discuss (1) JAMB 2001
160

As the concentration of an electrolyte reduces, the conductivity

  • A. reduces to zero
  • B. decreases
  • C. increases
  • D. is unaffected
View Answer & Discuss (20) JAMB 2001
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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