Fe₂O₃ + Al -----> Al₂O₃ + 2 Fe. The reducing agent in this reaction is.

The red colour of rubies are due to the presence of the metal ion.

Group II metals are called

The intensity of the flame colour of alkali metals can be measured using

The catalyst used in the hydrogenation of fats to make margarine

The nature of aluminium hydroxide is

An alkaline solution of calcium hydroxide is called

The naturally occurring colourless crystalline form of aluminium oxide (Al₂O₃) is called

This reaction is called.