Answer the following questions
What is a mineral? State two characteristics of minerals.
Minerals are natural substances of organic or inorganic origin with definite chemical and physical properties.
Two characteristics of minerals are-
- Minerals are not evenly distributed over space.
- Minerals have inverse relationship in quality and quantity.
What is the difference between metallic and non-metallic minerals?
|Metallic minerals||Non-metallic minerals|
|Metallic minerals are minerals in which metal elements are present in their raw form.||Non-metallic minerals do not contain any metal substances in them.|
|Metallic minerals are usually found in igneous and metamorphic rock formations.||Non-metallic minerals are often found embedded in young fold mountains and sedimentary rocks.|
|Metallic minerals are good conductors of electricity as well as heat.||Non-metallic minerals are basically good insulators of electricity and heat.|
|Metallic minerals have high malleability and ductility.||Non-metallic minerals lack malleability and ductility and these minerals break down easily.|
|Metallic minerals generally have lustre.||Non-metallic minerals do not have any shine or lustre.|
Name the three varieties of iron ore mined in India. Name one state where each is found.
The three varieties of iron ore mined in India are-
1. Haematite — It is found in Odisha.
2. Magnetite — It is found in Tamil Nadu.
3. Limonite — It is found in Uttarakhand.
(i) Name the best quality of iron ore.
(ii) Name two states where it is found.
(i) Magnetite is the best quality of iron ore.
(ii) It is found in Tamil Nadu and Karnataka.
What type of mineral is copper? Name any two states where copper is found in India.
Copper is a non-ferrous metal. It is found in Madhya Pradesh and Rajasthan.
State two uses of aluminium.
Aluminium is used in aircrafts and automobiles.
Bauxite is an oxide of which metal? Where are the deposits of Bauxite found in India?
Bauxite is an oxide of aluminium. The deposits of Bauxite are found in Goa, Odisha, Gujarat, Madhya Pradesh, Chattisgarh, Jharkhand, Maharashtra, Karnataka and Tamil Nadu.
Give a reason for each of the following:
(i) Manganese is an important raw material in the iron and steel industry.
(ii) Bauxite is used in electrical equipment industry.
(iii) Raw iron needs to be alloyed in order to be useful in construction and automobile industry.
(i) Manganese is an important raw material in the iron and steel industry because it is used to make steel tough and resistant to rusting.
(ii) Bauxite is used in electrical equipment industry because it is a good conductor of electricity.
(iii) Raw iron needs to be alloyed in order to be useful in construction and automobile industry because raw iron by itself is not as strong and hard as needed for construction and automobile industry.
How is brass and bronze made? State two uses of copper.
Copper is alloyed with zinc to form brass and with tin to make bronze.
Two uses of copper are-
- It is used in building construction for roofing and plumbing.
- It is used in ship-building industry.
Name two leading states producing manganese. State two industrial uses of manganese.
Two leading states producing manganese are Karnataka and Odisha.
Two industrial uses of manganese are-
- It is an important raw material for the iron and steel industry.
- It is used in chemical industries for manufacturing bleaching powder.
(i) Name two characteristics of iron ore deposits in India that facilitate their optimum use in the iron and steel plants.
(ii) Name two industries that require iron ore as raw material.
(i) Two characteristics of iron ore deposits in India that facilitate their optimum use in the iron and steel plants are-
- Iron ore deposits occur as hill masses and are easily accessible.
- They are found in close proximity to the areas producing coal, dolomite, limestone and manganese.
(ii) Two industries that require iron ore as raw material are iron and steel industries.
Give a reason for each of the following:
(i) Magnetite is so called.
(ii) Copper is used for making electric wires.
(iii) Aluminium is used for making aircraft.
(i) Magnetite is so called because it possesses magnetic property.
(ii) Copper is used for making electric wires because it is a good conductor of electricity, highly malleable and ductile.
(iii) Aluminium is used for making aircraft because it is light weight and strong.