A mineral is called an ore if :

A mineral is called ore if…….

A mineral is called ore if:

Assertion (A): A mineral is called ore, when metal is extracted from it conveniently and economically. Reason (R): All ores are minerals but all minerals are not ores.

A mineral is known as ore if metal

A mineral is known as an ore of metal if the metal _______

Which of the following minerals is not an ore of aluminum?