Question

In the classification of minerals, which mineral does not form the group of valuable metallic minerals?
A. Copper
B. Silver
C. Gold
D. Platinum

Answer 1

Hint : Minerals are solid substances that are present in nature and can be made of one element or more elements combined together (chemical compounds). Metallic minerals are those that contain one or more metals and possess hard and shiny surfaces which are found in igneous rocks.

Complete answer :
Option A, ‘Copper’ falls in the category of metallic minerals but it is not considered valuable because of its value remaining stable due to its multiple uses. It is considered to be a solid investment in the industrial sector because of its electrical conductivity. In terms of human benefits, it is considered as an essential nutrient when combined with iron. It helps the body in forming red blood cells, maintains the immune system, the nerves and in the iron absorption. So, it is the correct answer.

Additional information:-
Option B, ‘Silver’ is also an important precious metallic mineral whose price increases according to the market demand and supply. It is used in solar panels, jewelry, utensils, coins etc. It possesses high electrical and thermal conductivity. So, it is not the correct answer to the given question.

Option C, ‘Gold’ is a highly priced mineral which has golden yellow color used for a variety of purposes including coinage, jewelry and bullion. It is used as an electrical conductor in computers, circuits, appliances, cell phones etc. Thus, it forms the group of valuable metal and incorrect answers.

Option D, ‘Platinum’ is the most expensive and rarest metal found which is much rarer than gold. It is an excellent conductor of electricity. It is silver gray or steel gray, dark gray in color. Platinum is used for jewelry, decoration and dental work. It is stronger and more durable than gold. Thus, it is a valuable metallic mineral and an incorrect answer.


Therefore, the correct answer is Option A, i.e. Copper.

Note :Non-metallic metals are those that do not contain any metallic elements. They do not possess a shiny surface and are not as hard as metallic minerals. It is found in sedimentary rocks. They are very poor conductors of electricity. For example: carbon, diamond, potash, precious stones etc.