Which gas accumulates at the anode after electromagnetic decomposition of alumina?

is silica?

Oxides commonly occur in metals?

Which is the first metal used by humans?

What substance is formed by the action of chlorine gas on dry quenched lime?

Is gas given with oxygen to patients for diagnosis of breathing problem?

It is easy to make stone by beating metals. Which property of the metal does it indicate?

Which of the following metals does not react with cold or hot water?