________is the chemical formula of rust.

Crystal type inorganic substances present in earth crust is

Pick the odd one out.

Pick the odd one out.

Na and K are kept in

___________is used in Electric Iron.

Pick the odd one out.

Find out the odd one.

The ability of metals to produce a particular sound when it is tapped on a hard surface is known as

Name the metal which is more in the earth's crust?