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169 answers across CBSE, ICSE, and State boards — Class 1 to 12, every subject.

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Social StudiesClass 10CBSE

What is the significance of the border roads?

Border roads are of strategic importance, and these roads in the bordering areas of the country have improved accessibility in areas of difficult terrain and have helped in the economic development of these areas.

Social StudiesClass 10CBSE

Where and why is rail transport the most convenient means of transportation?

Rail transport is the most convenient means of transportation in the northern plains, as there are level stretches of land with high population density and rich agricultural resources.

Social StudiesClass 10CBSE

State any three merits of roadways.

Three merits of roadways are The construction cost of roads is much lower than that of railway lines. Road transport is economical in the transportation of a few persons and a relatively smaller amount of goods over short distances. Roads can traverse comparatively more dissected and undulating topography.

Social StudiesClass 10CBSE

Which one of the following terms is used to describe trade between two or more countries? a. Internal trade b. International trade c. External trade d. Local trade

(b ) International Trade

Social StudiesClass 10CBSE

Which one of the following is the most important mode of transportation in India? a. Pipeline b. Railways c. Roadways d. Airways

(b) Railways

Social StudiesClass 10CBSE

Which one of the following ports is the deepest land-locked and well-protected port along the east coast? a. Chennai b. Paradip c. Tuticorin d. Vishakhapatnam

Vishakhapatnam

Social StudiesClass 10CBSE

Which one of the following states is not connected with the H.V.J. pipeline? a. Madhya Pradesh b. Maharashtra c. Gujarat d. Uttar Pradesh

Maharashtra

Social StudiesClass 10CBSE

. Which mode of transportation reduces trans-shipment losses and delays? a. Railways b. Roadways c. Pipelines d. Waterways

Pipelines

Social StudiesClass 10CBSE

Which two of the following extreme locations are connected by the east-west corridor? a. Mumbai and Nagpur b. Silcher and Purbandar c. Mumbai and Kolkata d. Nagpur and Siliguri

(b) Silcher and Purbander

Social StudiesClass 10CBSE

Discuss the steps to be taken to minimise environmental degradation by industry.

The steps that can be taken to minimise environmental degradation by industries are given below: Adopting the latest techniques and upgrading existing equipment to improve energy efficiency. Providing green belts for nurturing ecological balance. Particulate matter in the air can be reduced by fitting smokestacks to factories with electrostatic precipitators, fabric filters, scrubbers and inertial separators. Using silencers for noise-generating equipment. Minimising water usage by reusing and recycling it in two or more successive stages. Harvesting of rainwater to meet water requirements Treating hot water and effluents before releasing them in rivers and ponds. Treatment of industrial effluents can be done in three phases: Primary treatment by mechanical means. This involves screening, grinding, flocculation and sedimentation. Secondary treatment by biological process Tertiary treatment by biological, chemical and physical processes. This involves the recycling of wastewater.

Social StudiesClass 10CBSE

How do industries pollute the environment?

Industries are responsible for four types of pollution: Air Water Land Noise Air pollution is caused by the presence of a high proportion of undesirable gases, such as sulphur dioxide and carbon monoxide and airborne particulate matter. Water pollution is caused by organic and inorganic industrial wastes and effluents discharged into water bodies. Paper, refineries and tanneries are the main culprits. Soil and water pollution are closely related. The dumping of waste makes the soil useless for agricultural activities. The pollutants then reach the groundwater through the soil and contaminate it. Noise pollution is caused by industrial machinery and construction activities.

Social StudiesClass 10CBSE

Write the answers to the following questions in 120 words. (i) How are integrated steel plants different from mini steel plants? What problems does the industry face? What recent developments have led to a rise in the production capacity?

Integrated steel plants are large and handle everything in one complex – from putting together raw material to steel making, rolling and shaping. Mini steel plants are smaller, have electric furnaces, and use steel scrap and sponge iron. They have re-rollers that use steel ingots as well. They produce mild and alloy steel of given specifications. The challenges faced by the steel industry are given below: High cost and limited availability of coking coal Lower productivity of labour Irregular supply of energy Poor infrastructure Recent developments such as liberalisation and foreign direct investment (FDI) have given a boost to the industry with the efforts of private entrepreneurs.

Social StudiesClass 10CBSE

Name the important raw materials used in the manufacturing of cement.

Important raw materials used in the manufacture of cement are the following: Limestone Silica Alumina Gypsum

Social StudiesClass 10CBSE

What are the basic industries? Give an example.

Basic or key industries are the industries which supply their product or raw materials to manufacture other goods. For example, iron and steel industries provide iron and steel to other industries as raw materials.

Social StudiesClass 10CBSE

Name any three human factors for the location of an industry.

Three human factors for the location of an industry are the following: Labour Capital Closeness to cities E.g., the jute textile industry in West Bengal gets cheap labour from the adjoining states, and Kolkata is a large urban centre for banking, insurance and port facilities.

Social StudiesClass 10CBSE

Name any three physical factors for the location of the industry.

Three physical factors for the location of the industry are: Availability of raw materials Closeness to market Availability of power For example, the jute textile industry is concentrated in West Bengal as the jute-producing areas lie in the Hugli basin, and there is cheap water transport for the transportation and processing of jute.

Social StudiesClass 10CBSE

What is manufacturing?

Manufacturing is the production of goods in large quantities after processing raw materials to produce more valuable products. For example, paper is manufactured from wood, sugar from sugarcane, iron and steel from iron ore and aluminium from bauxite.

Social StudiesClass 10CBSE

Which one of the following industries manufactures telephones, computer, etc? a) Steel (b) Electronic (c ) Aluminium (d) Information Technology

Solution: (b) Electronic

Social StudiesClass 10CBSE

Which one of the following industries uses bauxite as a raw material? a) Aluminium (b) Cement (c ) Jute (d) Steel

Solution: (a) Aluminium

Social StudiesClass 10CBSE

Which one of the following agencies markets steel for the public sector plants? a) HAIL (b) SAIL (c ) TATA Steel (d) MNCC

Solution: (b) SAIL

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