Question

Give two examples of non – ferrous minerals.
A) Hematite and Magnetite
B) Gold and Copper
C) Manganese and Magnetite
D) None of these

Answer 1

Hint: Non – ferrous minerals are metals which are very costly and these metals does not contain iron. As ferrous is another name of iron. So, non – ferrous means, non-iron metals. The main benefit of non-ferrous metals is malleability.

Complete answer:
Option A) Hematite and Magnetite – these two minerals hematite and magnetite are ferrous metals that contain iron, but magnetite has a higher amount of iron as compared to the hematite. Hematite is paramagnetic and magnetite is ferromagnetic, the major difference between these two minerals. So, this is an incorrect answer because they are not non – ferrous minerals.

Option B) Gold and Copper – these metals are comparatively high in price and they do not possess high strength. Gold and copper are non – magnetic in nature. Thus, this option is the correct answer because gold and copper are non – ferrous metals.

Option C) Manganese and Magnetite – Manganese is considered as the fifth most heavily found metal in Earth’s crust. Manganese are found in combination with iron. However, this is a ferrous metal and magnetite is also a ferrous metal because it contains iron. Thus, this option is an incorrect answer as they are ferrous metals.

Option D) None of these – is an invalid option because correct lies in option B.

Additional information: The properties of non – ferrous metals are: colorful, great electrical conductivity, low density, easy to fabricate.The properties of ferrous metals are: Durable, recyclable, good conductor of electricity, usually magnetic in nature, great strength. Two examples of non – ferrous minerals are: Gold and copper.

Note: There are two types of metals known as ferrous metals and non – ferrous metals. Ferrous metals are those metals that contain iron. For example: stainless steel, cast iron, alloy steel and are best known for their strength. Whereas, non-ferrous is just opposite of ferrous metals, non-ferrous metals do not include iron and examples of such metals are silver, aluminum, tin, lead and etc. and known for their higher prices.