Which liquid metal is used for making thermometers?

Zinc sulphate forms a colourless solution in water. Will you observe any colour on adding copper turning in it?

Why are bells made of metals?

Which of the following metals can displace the other two metals from their salt solutions?

Zinc, Iron, Copper

Paheli bought a statue made of copper. To her surprise it acquired a dull green coating after a couple of months. Explain the reason.