TEXTBOOK QUESTIONS SOLVED
Q1. Answer the following questions in about 30 words: Conventional and non-conventional sources of energy.
Conventional and non-conventional sources of energy
|Conventional sources||Non-conventional sources|
|I conventional Sources of energy|
are In use from the past.
|1 The non-conventional sources are in use from recent times.|
|2. They spread pollution.||2. These are eco-friendIy.|
|3. Conventional sources of energy are generally exhaustible.||3. Non-conventional sources of energy are usually inexhaustib re.|
|4. These meitide firewood. cattle dung cake, coal. petroleum. natural gas and electricity (both hydel and thermal).||4. These include solar, wind, tidal. geothermal, biogas and atomic energy.|
Q2. Answer the following questions in about 120 words.
(i) Describe the distribution of coal in India.
(ii) Why do you think that solar energy has a bright future in India?
. (i) Coal is an important fossil fuel of India. It is the most abundantly available fossil fuel. It provides about 80% of the nation’s energy needs. India is highly dependent on coal for meeting its commercial energy requirements. In India, coal occurs in rock series of two main geological ages—Gondwana and tertiary. While Gondwana coal is about 200 million years old, tertiary deposits are approximately 55 million years old. The major resources of Gondwana coal which are metallurgical coal, are located in the Damodar valley (West Bengal, Jharkhand). Jharia, Raniganj and Bokaro are important coalfields. The Godavari, Mahandi, Son and Wardha valleys also contain coal deposits. Tertiary coals occur in the north-eastern states of Meghalaya, Assam, Arunachal Pradesh and Nagaland.
(ii) Being a tropical country. India has an abundui I. of sunlight. Hence, there are huge possibilities tapping solar energy. Photovoltaic technolopl converts sunlight directly into electricity. Sall energy is becoming popular in rural and renit,I, areas. Use of solar energy will be able to minn two the dependence of rural households on firewood dung cakes, which in turn will contribtut, environmental conservation and adequate supply “I manure in agriculture. Solar energy is a non conventional source of energy and also eco-friendiy The largest solar plant of India is located Madhapur, near Bhuj (Gujarat) where solar energy used to sterlise milk cans.