The chief constituents of steel made in India are

What are the oxidation states of iron in the minerals hematite and magnetite?

Describe the preparation of potassium dichromate from iron chromite ore. What is the effect of increasing $pH$ on a solution of potassium dichromate?

When $XO_2$ is fused with an alkali metal hydroxide in the presence of an oxidizing agent such as $KNO_3$,a dark green product is formed which disproportionates in an acidic solution to afford a dark purple solution. $X$ is

What is the chemical formula of Calomel?

Which compound of zinc is white in the cold state and turns yellow in the hot state?