Q1. Write about the utility of manganese?
A. Manganese is used in the manufacturing of steel and ferrous-manganese alloy.
It is also used in manufacturing of bleaching powder, insecticides, and paints.
Q2. Which state is the largest producer of manganese ores in India.
A. Orissa, it accounts for one-third of the total production in India.
Q3.What are non-ferrous minerals? Why are they important?
A. Minerals which do not contain iron are called non-ferrous minerals. We do not have satisfactory reserves of these minerals but they play vital role in number of metallurgical, engineering and electrical industries. Some of such minerals are copper, bauxite, zinc, lead and gold.
Q4. Write properties of copper. Also write its utility.
A. It is malleable, ductile, and a good conductor of heat and electricity.
Utility—It is mainly used in electrical cables, electronics and chemical industries.
Q5. List the regions where copper is found.
A. a)The Balaghat mines in MP produce 52% of India’s copper.
b)The Singhbhum district of Jharkhand
c)The Khetri mines in Rajasthan.
Q6.Write a note on Bauxite.
A. Though several ores contain aluminium, it is from Bauxite that Alumina and Aluminium is obtained.
B. Bauxite deposits are found in the rocks rich in aluminium silicates.
C. Properties of aluminium: It is extremely light, combines the strength of metals, has good conductivity and great malleability.
Q7. Where do we find Bauxite deposits in India?
A. a) Deposits---mainly in Amarkantak pleatue, Maikal hills and pleatue regions of Bilaspur-Katni.
b) Orissa is the largest Bauxite producing state in India-45% of total production.
c) Panchpatmali deposits in Koraput district are important reserves.
Q8. What do you mean by non metallic minerals? Give some examples.
A. Minerals which do not contain metals or do not have metallic properties are called non metallic minerals. For example..mica, limestone, salt, potash, sulphur, granite, marble, sandstone, etc.