Minerals And Energy Resources Social Study Chapter Solutions NCERT Class 10
1. What is mineral ? How is mineral important ?
Answer :
Homogeneous naturally occurring substance with definable internal structure is called mineral. Mineral are an indispensible part of our lives. Almost everything we use, form a tiny pin to a towering building or a big ship, all are made from minerals. The railway lines and the tarmac (paving) of the roads, our implements too are made of minerals and run on power resources derived from earth. Even the food that we eat contains minerals. In all stages of development, human beings have used minerals.
2. Differentiate between rock and minerals ?
Answer :
Rock:
It is material composed of one or more minerals earth crust.
it has no definite composition
Ex - Basalt
Minerals
It is homogeneous naturally occurring substances in earth crust.
It has definite chemical composition.
Ex- Iron, Copper
3. Name the various properties used by geologist to classify minerals?
Answer :
Wide range of colors, hardness, crystal forms, luster and density that a particular mineral possesses.
4. Explain the forms of minerals?
Answer :
In sedimentary rocks, a number of minerals occurs in beds or layer.
Another mode of formation involves the decomposition of surface rocks, and the removal of soluble constituents, leaving
a residual mass of weathered material containing ores.
Certain minerals may occur as alluvial deposits in sands of valley floors and the base of hills.
The ocean waters contain vast quantities of minerals, but most of these are too widely diffused.
5. Why are minerals may having great variation in distribution in India ?
Answer :
: India is fortunate to have fairly rich and varied mineral resources . However these are unevenly distributed. Broadly speaking, perpendicular rocks contain most of the reserves of coal, metallic minerals, mica and many other non-metallic minerals.Sedimentary rocks on the western and eastern flanks of the peninsula, in Gujarat and Assam have most of the petroleum deposits. Rajastan with the rocks system of the peninsula, has reserves of many non-ferrous minerals. The vast alluvial plains of north India are almost devoid economic mineral. These variations exist largely because of the differences in the geological structure processes and time involved in formation of minerals.
6. Mention various factors that play an important role in affecting economic viability in a region?
Answer :
The concentration of mineral in the ore, the ease of extraction and closeness to the market play an important role in affecting the economic viability of a reserve. Thus, to meet the demand, a choice has to be made between a number of possible options. When this is done a mineral ‘deposits’ or reserve turns into a mine.
7. Name the different varieties of iron ore found in India?
Answer :
- Limonite
- Siderite
- Magnetite
- Hematite
8. Give a point of similarity and a point of difference between magnetite and hematite?
Answer :
Similarity - Both of them are iron ores
Difference-Magnetite has iron content of up to 70% but hematite has 50-60 percent.
9. Which iron ore mine is, 100% exporter?
Answer :
Kudremukh
10. From which sed port iron is exported?
Answer :
| Port | Mineral | Uses | States |
|---|---|---|---|
| marmago port | Iron ore | Metal of universal use, used for making machines, tools etc. | odisha, Jharkhand, Karnataka |
| Paradeep port | Manganese | Used in manufacturing of steel and ferro-manganese alloy | Odisha, Madhya Pradesh, Karnataka |
| Copper | Copper is mainly used in electric cables, electronic and chemical industries. | Madhya pradesh, Jharkhand, Rajasthan | |
| Bauxite | Odisha, Gujarat, Jharkhand, Maharashtra | ||
| Mica | it is used for making cans, foils, kitchen, utensils, window frame etc. | Jharkhand, Rajasthan, Andhra Pradesh | |
| Limestone | Used in electronic industries and electric | Andhra Pradesh, Madhya Pradesh, Rajasthan, Gujarat, Tamil nadu. |
11. Why is it necessary to conserver minerate?
Answer :
The total volume of work alde deposits is an insignificant fraction i. e. one present of the earth’s circuit. We are rapidly consuming mineral resources that required millions of years to be created and concentrated. The geological processes of mineral formation are so slow that the rates of replenishment are infinitely small in comparison to the present rate of consumption. Mineral resources therefore, finite and non-renewable. Rich mineral deposits are our country’s extremely valuable but short lived possessions. So, it is necessary to conserve minerals.
12. How can we conserve minerals?
Answer :
A concerted effort has to be mode in order to use our mineral resources in a planned and a sustainable manner. Improved technologies need to be constantly evolved to allow use of low grade ores at low costs. Recycling of metal, using scarps metals and other substitutes are steps in conserving our mineral resources for the future.
