Class 10 Manufacturing Industry Important Questions 21-22l Manufacturing Industry Class 10 NCERT solutions
Manufacturing Industry - Class 10 NCERT Exercise and Important Questions Answers.
1. Multiple choice questions.
(i) Which one of the following minerals are formed by the decomposition of rocks, leaving a residual mass of weathered material?
(a) Coal
(b) Bauxite
(c ) Gold
(d) Zinc
Answer:
(b) Bauxite
(ii) Koderma, in Jharkhand, is the leading producer of which one of the following minerals?
(a) Bauxite
(b) Mica
(c) Iron Ore
(d) Copper
Answer:
(b) Mica
(iii) Minerals are deposited and accumulated in the strata of which of the following rocks?
(a) Sedimentary Rocks
(b) Metamorphic Rocks
(c ) Igneous Rocks
(d) None of the above
Answer:
(a) Sedimentary Rocks
(iv) Which one of the following minerals is contained in the Monazite sand?
(a) Oil
(b) Uranium
(c) Thorium
(d) Coal
Answer:
(c) Thorium
2. Answer the following questions in about 30 words.
(i) Distinguish between the following.
a. Ferrous and non-ferrous minerals.
Answer:
Ferrous minerals | Non-ferrous minerals |
i.Metallic minerals which contain iron are called ferrous minerals. ii. For example - iron ore, manganese, nickel, cobalt, etc. | i.Metallic minerals which do not contain iron are called non-ferrous minerals. ii. For example - copper,lead, zinc, bauxite, tin, gold etc. |
b. Conventional and non-conventional sources of energy.
Conventional sources of energy | Non-conventional sources of energy |
i. These are the traditional sources of energy produced from coal, petroleum and natural gas. ii. They are non- renewable. iii. Their generation is expensive. iv. They pollute the atmosphere on a large scale. v. For example - firewood, cattle dung cake, coal, petroleum, natural gas, etc. | i. These are the sources of energy developed recently from the sun, wind, tides, etc. ii. They are renewable. iii. Their generation is very cheap. iv. They are pollution-free sources. v. For example - solar, wind, tidal, geothermal, biogas, nuclear energy, etc. |
(ii) What is a mineral?
Answer:
A mineral is a naturally occurring homogenous substance with a definite chemical composition and a well defined internal structure.
Minerals are found in varied forms in nature, ranging from the hardest diamond to the softest talc.
(iii) How are minerals formed in igneous and metamorphic rocks?
Answer:
In igneous and metamorphic rocks, minerals may occur in the cracks, crevices, faults or joints. The smaller deposits are called veins and the larger ones are called lodes.
When the minerals in liquid/ molten and gaseous forms are forced upward through cavities towards the earth’s surface, they cool down and solidify to form veins(the smaller occurrence are called veins) or lodes(the larger occurrence are called loads) . Metallic minerals like tin, copper, zinc and lead are obtained from veins and lodes.
(iv) Why do we need to conserve mineral resources?
Answer:
We need to conserve mineral resources because:-
a. It takes millions of years for the formation of minerals. Compared to the present rate of consumption , the replenishment rate of minerals is very slow.
b. Minerals resources are finite and non-renewable. Due to this, it is important that we conserve the mineral resources.
c. They are unevenly distributed. To maintain equal distribution of the resources, they need to be conserved.
d. Minerals are used extensively in industries and economic development. Without them development will come to a halt.
3. Answer the following questions in about 120 words.
(i) Describe the distribution of coal in India
Answer:
In India, major coal deposits are found on the eastern side of the country. Some of the main sites of coal are described below:
a. In India, coal occurs in rock series of two main geological ages Gondwana (200 million years old) and tertiary (55 million years old).
b. The major resources of Gondwana or metallurgical coal are located in the Damodar valley (West Bengal, Jharkhand), Jharia, Raniganj and Bokaro.
c. The Godavari, Mahandi, Son and Wardha valleys also contain coal deposits.
d. Tertiary coals occur in the north-eastern states of Meghalaya, Assam, Arunachal Pradesh and Nagaland.
(ii) Why do you think that solar energy has a bright future in India?
Answer:
Solar energy has a bright future in India because:
a. India being a tropical country receives sunlight in abundance throughout the year.
b. Solar plants can be easily established in rural and remote areas.
c. It will minimize the dependence of rural households on firewood and dung cakes which in turn will contribute to environmental conservation and adequate supply of manure in agriculture.
Class 10 Geography Important Questions with Answers.
Very Short Answer type Questions
Q. 1.Where was the First Jute mill set up?
Ans. The first Jute mill was set up in 1859 at Rishra near Kolkata.
Q. 2. What are the uses of aluminium?
Ans. Aluminum is used to manufacture Utensils, air craft and wires.
Q. 3. Which mineral is used to Harden steel during manufacturing?
Ans. Manganese is used to Harden steel during manufacturing.
Q. 4. What do you know about SAIL?
Ans. All Public sector undertakings market their steel through Steel Authority of India Ltd. called SAIL.
Q. 5. Which Organic chemicals are produced India?
Ans. Petrochemicals, which are used for manufacturing of synthetic fibres, synthetic rubber, plastics, dye stuff, drugs and pharmaceuticals.
Q. 6. Which city has emerged as the 'electronics capital' of India?
Ans. Bengaluru has emerged as the electronic capital of India.
Q. 7. Name two iron and steel plants of Jharkhand.
Ans . Bokaro and Jamshedpur are two iron and steel plants of Jharkhand.
Q. 8. When and where first cotton Mill was set-up?
Ans. First cotton textile mill was set-up at Mumbai in 1854.
Q. 9. How is Iron - ore transported from Kudremukh mines to a port near Mangalore?
Ans. Iron- ore is transported as slurry through pipelines.
Q. 10. Name the most important agro-based industries of India.
Ans. Sugar, cotton, jute are the most important agro-based industries of India.
Short Answer Type Questions
Q. 1. " Agriculture and industry are complimentary to each other." Support the statement with three examples.
Ans. Agriculture and industry both depend on each other
i) Agriculture supplies raw material for the manufacturing industries. Shortage of these raw materials can spell doom for the industry.
ii) Agriculture gets its basic inputs from the Manufacturing industries.
iii) In this way agriculture offers a big market for industrial products, fertilizers, water pumps, tractors, farm equipment etc.
In short, agriculture and industry are not exclusive of each other they move hand in hand.
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