Metals and Non-...

Which of the following metals is present in the anode mud during the electrolytic refining of copper?

An element reacts with oxygen to give a compound with a high melting point. The compound is soluble in water. The element is likely to be

The second most abundant metal in the earth’s crust is

An alloy of Zn and Cu is dissolved in dil. HC1. Hydrogen gas is evolved. In this evolution of gas

A greenish coating develops on copper utensils due to formation of

Rusting of iron takes place in

The bronze medals are made up of

Silver articles becomes black on prolonged exposure to air. This is due to the formation of

During smelting, an additional substance is added which combines with impurities to form a fusible product known as

A student placed an iron nail in copper sulphate solution. He observed the reddish brown coating on the iron nail which is