Which alloy is used to prepare surgical instruments?

Which process occurs at the anode during the process of electrolysis?

State whether the following statement is true or false:
At ordinary temperature,the surfaces of metals such as magnesium,aluminium,zinc,lead,etc.,are covered with a thin layer of oxide which prevents the metal from further oxidation.

Which of the following non-metals exists in a solid state at room temperature?

In the electrolytic refining of copper metal,what is used as the cathode?

When a copper wire is left in silver nitrate solution,it is observed that the solution turns bluish green.
$(a)$ Explain the observation.
$(b)$ Write the balanced chemical equation to represent the change taking place.