Question

What will happen if copper sulphate reacts with a gold ring?
a) it will turn green
b) it will turn golden
c) no colour change
d) it will produce gas​

Answer 1

Answer:

d) it will produce gas

Explanation:

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Answer 2

Explanation:

CuSO4 + Au = is not favorable, energetically. At STP, there will be no reaction. Gold is much less active than copper so there will be negligible gold sulfate formed by substitution. Gold is the lowest metal in the electrochemical series, so it will not react chemically with salts of any other metal.