JAMB Chemistry Past Questions, Answers & Explanations - Chemistry

Jamb Chemistry Questions

Question 26:

JAMB 2003

When at equilibrium, which of the reactions below will shift to the right if the pressure is increased and the temperature is kept constant?

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A 2SO_3(g) â†” 2SO_2(g) + O_2(g)
B 2CO_2(g) ↔ 2CO_(g) + O_2(g)
C 2H_2(g) + O_2(g) â†” 2H₂O_(g)
D 2NO_(g) â†” N_2(g) + O_2(g)

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Question 27:

JAMB 2003

In the electrolysis of a concentrated solution of sodium chloride using electrodes, which of the following ions are discharged at the cathode and anode respectively?

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A Na⁺ and Cl^-
B Na⁺ and OH^-
C H⁺ and OH^-
D H⁺ and Cl^-

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Question 28:

JAMB 2003

CO_(g) + H₂O_(g) â†’ CO_2(g) + H_2(g)
From the reaction above, calculate the standard enthalpies of formation of CO_2(g), H₂O_(g) and CO_(g) in kJ mol^-1 are -394, -242, and -110 respectively.

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