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Electrolysis is an example of which process?

Gold is extracted by hydrometallurgical process, based on its property

1) of being electropositive

2) of being less reactive

3) to form complexes which are water soluble

4) to form salts which are water soluble  

Sulphide ores are common for metals

1) Ag, Cu and Pb

2) Ag, Cu and Sn

3) Ag, Mg and Pb

4) Al, Cu and Pb  

Which of the following is an oxide ore?

1) Malachite     2) Haematite     3) Copper glance    4) Zinc blende  

Wurtz reaction involves the reduction of alkyl halide with

1) Zn/HCl 

2) HI

3) Zn/Cu couple

4) Na in ether  

2Cl2(g) + 2H2O (g) = 4HCL(g) + O2(g)

Delta H = 115 kJ

At 25 degrees C, the equilibrium partial pressures in a 5Lcontainer are as follows:

[P(Cl2)] = 3.1 atm

[P(H2O)] = 3.1 atm

[P(HCl)] = 1.3 *10^-3 atm

[P(O2)] = 1.5 atm.

Calculate the Kp at 25 degrees C.