JAMB Chemistry Past Questions & Answers - Page 257

3CuO_(s) + 2NH_3(g) → 3Cu_(s) + 3H₂O_(I) N_2(g) (i).

2NH_3(g) + 3Cl_2(g) → 6HCl_(g) + N_2(g) (ii).

4NH_3(g) + 3O_2(g) → 6H₂O_(I) + 2N_2(g) (iii).

The reactions represented by the equations above demonstrate the?

A gas that turns a filter paper previously soaked in lead ethanoate solution black is?

2X_(g) + Y_(g) → Z_(g): In the equation above, The rate of formation of Z is found to be independent of the concentration of Y and to quadruple when the concentration of X is doubled. The correct equation for the reaction is?

2Cl^2(g) + 2H₂O_(g) 4HCl_(g) + O_2(g)
∆H° = +115KJ mol^-1. In the above equilibrium reaction, a decrease in temperature will?

Mg²⁺_(aq) + 2e^->_(aq) → Mg_(s)E°_(volts) = 2.370

Zn²⁺_(aq) + 2e^->_(aq) → Zn_(s)E°_(volts) = -0.763

Cds²⁺_(aq) + 2e^->_(aq) → Cd_(s)E°_(volts) = 0.403

Cu²⁺_(aq) + 2e^->_(aq) → Cu_(s)E°_(volts) = 0.340

In the electrochemical series above, the strongest reducing agents is?