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Chemistry 1992 JAMB Past Questions

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26

Which of the following equilibria shows little or no net reaction when the volume of the system is decreased?

  • A. H2(g) + I2(g) ≈ 2HI(g)
  • B. 2NO2(g) ≈ N2O4(g)+O4(g)N2O4(g)
  • C. PCI5(g) ≈ PCI3(g) + CI2(g)
  • D. ZnO(s) + CO2(g) ≈ ZnCO3(g)
View Answer & Discuss (14) JAMB 1992
27
For a general equation of the nature xP + yQ ≈ mR + nS, the expression for the equilibrium constant is?
  • A. k (p)x (Q)y
  • B. (p)x (Q)y / (R)m (S)n
  • C. (R)m (S)n / (p)x (Q)y
  • D. m(R) n (S) / x(P) y (Q)
View Answer & Discuss JAMB 1992
28

Which of these statements is TRUE about carbon (IV) oxide?

  • A. it supports combustion
  • B. It is strongly acidic in water
  • C. It is very soluble in water
  • D. It supports the buring of magnesium to produce magnesium oxide
View Answer & Discuss (18) JAMB 1992
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29

Which of the following combination of gases is used for metal welding? i. Oxygen and ethyne, ii. Hydrogen and ethyne, iii. Hydrogen and oxygen, iv. Ethyne, hydrogen and oxygen.

  • A. i and ii
  • B. ii and iv
  • C. i and iii
  • D. ii and iv
View Answer & Discuss (6) JAMB 1992
30
Which of the following oxides of nitrogen is unstable in air?
  • A. NO2
  • B. NO
  • C. N2O4
  • D. N2O5-
View Answer & Discuss (2) JAMB 1992
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