The surface of a zinc plate a shining appearance when kept in a solution of mercuric chloride, but no change is observed when zinc is placed in a solution of magnesium chloride. Explain the reason.

On placing a piece of zinc metal in a solution of mercuric chloride, it acquires a shining silvery surface but when it is placed in a solution of magnesium sulphate, no change is observed. Explain.

On placing a piece of zinc metal in a solution of mercuric chloride, it acquires a silvery surface but when it is placed in a solution of magnesium sulphate, no change is observed. State the reason for the behaviour of zinc metal.

When a saturated solution of sodium chloride is heated it

What happens when phosphine is absorbed in mercuric chloride solution ?

A thin slice of sugarbest, when placed in a sconentrated solution of sodium-chloride would

Mention with reason the colour changes observed when : a piece of zinc is dropped in copper sulphate solution.