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The solution with the lowest pH value is

A. 5 ml of (m/10) HCL
B. 10 ml of (m/10) HCL
C. 15 ml of (m/5) HCL
D. 20 ml of (m/8) HCL

View Answer & Discuss (27) JAMB 1999

The solubility product of Cu(IO₃)₂ is 1.08 * 10^-7. Assuming that neither ions react appreciable with water to form H⁺ and OH^-, what is the solubility of this salt?

A. 2.7 * 10^-8 mol dm^-3
B. 9.0 * 10^-8 mol dm^-3
C. 3.0 * 10^-3 mol dm^-3
D. 9.0 * 10^-3 mol dm^-3

View Answer & Discuss (23) JAMB 1999

The entropy and enthalpy of a system are a measure of

A. degree of disorderlinesss and heat content respectively
B. heat content and degree of disorderliness respectively
C. heat content of a system only
D. degree of disorderliness only

View Answer & Discuss (4) JAMB 1999

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2SO_2(g) + O_2(g) ↔ 2SO_3(g). In the chemical reaction above, the substance that will increase the rate of production of sulphur (VI) oxide is

A. manganese (IV) oxide
B. finely divided iron
C. vanadium (V) oxide
D. nickel

View Answer & Discuss (10) JAMB 1999

N₂O_4(g) ↔ 2NO_2(g). Increase in total pressure of the equilibrium reaction above will

A. produce more of NO_2(g) in the mixture
B. convert all of N₂O_4(g) to NO_2(g)
C. have no effect on the concentrations of NO_2(g)and N₂O_4(g)
D. produce more of N₂O_4(g) in the mixture

View Answer & Discuss (8) JAMB 1999

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