Chemistry Past Questions and Answers

Which of the following salts will turn blue litmus red?

Zn _(s) + CuSO ₄(aq) → ZnSO ₄(aq) + Cu _(s)
In the reaction above, the oxidation number of the reducing agent changes from

H ₂O _(g) + C _(s) → H_2(g) + CO_(g)
The oxidizing agent in the reaction above is

Calculate the quantity of electricity in coulombs required to liberate 10g of copper from a copper compound
[Cu=64, F = 96500 Cmol^-1]

How many faraday of electricity is required to produce 0.25 mole of copper?