NIOS Class 12 Environmental Science Chapter 36 Energy Conservation

NIOS Class 12 Environmental Science Chapter 36 Energy Conservation Solutions to each chapter is provided in the list so that you can easily browse throughout different chapters NIOS Class 12 Environmental Science Chapter 36 Energy Conservation Notes and select need one. NIOS Class 12 Environmental Science Chapter 36 Energy Conservation Question Answers Download PDF. NIOS Study Material of Class 12 Environmental Science Paper Code 333.

NIOS Class 12 Environmental Science Chapter 36 Energy Conservation

Also, you can read the NIOS book online in these sections Solutions by Expert Teachers as per National Institute of Open Schooling (NIOS) Book guidelines. These solutions are part of NIOS All Subject Solutions. Here we have given NIOS Class 12 Environmental Science Chapter 36 Energy Conservation Solutions, NIOS Senior Secondary Course Environmental Science Solutions for All Chapter, You can practice these here.

Energy Conservation

Chapter: 36

Module 8 B: Energy and Environment

Textual Question Answer

INTEXT QUESTIONS 31.1

1. Mention two most important impacts of energy use on environment.

Ans: Depletion of energy; emission of greenhouse gases due to burning of fossil fuel. 

2. Mention four important activities which you require energy in your daily life.

Ans: Cooking, heating and cooling of houses, TVs and computers and electrical gadgets.

3. Which is the most important input or factor required for economic growth in today’s world?

Ans: Energy is the most important input for economic growth, not population. Energy powers industries, transport, agriculture, and services that drive economic growth.

INTEXT QUESTIONS 31.2 

1. Name any one purpose for which the community may install a solar pump.

Ans: Water purification/irrigation. 

2. Why should we replace the ordinary bulbs in our house by CFL bulbs?

Ans: They use much less electricity and last longer. 

3. Why should there be regular monitoring and energy audit at work place?

Ans: To reduce energy consumption/ to conserve energy. 

4. What is car pool and how can car pool help in conserving petrol?

Ans: Car pool is sharing cars for going to work places. Much petrol is wasted when each person takes his own car to travel to the same place. 

INTEXT QUESTIONS 31.3 

1. Expand CFL.

Ans: Compact Fluorescent Lamp.

2. Name the equipment which uses wind as a source of energy at Auroville in Pondicherry.

Ans: Wind pump.

3. What is the concept of an energy-efficient town?

Ans: A township whose constructions are eco-friendly and inhabitants are eager to conserve energy resources. 

INTEXT QUESTIONS 31.4 

1. What is the role of energy auditing?

Ans: Systematic approach for monitoring industrial energy consumption and identifying sources of wastage. 

2. Give one limitation for each of following renewable source of energy (i) hydel power (ii) geothermal energy (iii) nuclear energy.

Ans: (i) Ecosystems/human settlements disturbed/ habitat loss/ biodiversity loss/ high developmental cost.

(ii) Smelly H2 S released/ pipelines corroded/ toxic minerals released. 

(iii) High cost of construction of nuclear plant/ fear of security and nuclear accidents/ problem of safe disposal of nuclear waste. 

3. Give one advantage for each of the following renewable source of energy (i) solar (ii) biomass (iii) wind.

Ans: (i) Environment friendly, cheap so popular in underdeveloped and developing countries.

(ii) It causes less garbage and is carbon neutral.

(iii) No pollution, available for free.

TERMINAL EXERCISE

1. What is energy conservation and how can it be conserved at household level? 

Ans: Energy conservation is a practice in which energy is conserved by avoiding the usage of unnecessary energy or wastage of energy. 

Energy can be conserved in households in many ways by turning off the light when not in use, by unplugging the electrical appliances, and using energy-efficient devices.

2. How is energy conservation possible while constructing buildings? Explain with the example of some energy efficient buildings. 

Ans: Energy conservation is possible during the construction of buildings by:

(i) Using energy-saving materials like fly ash bricks, hollow concrete blocks, and reflective roofing materials.

(ii) Ensuring proper insulation and sealing to reduce heat loss and cooling demand.

(iii) Designing for natural ventilation and daylighting to minimize dependence on artificial lighting and air-conditioning.

(iv) Installing solar panels, rainwater harvesting systems, and energy-efficient appliances.

(v) Incorporating green roofs and passive solar design to maintain indoor comfort naturally.

Example:

Indira Paryavaran Bhavan, New Delhi – India’s first net zero energy building, designed with solar panels, energy-efficient lighting, double-glazed windows, and rainwater harvesting.

Infosys Campus (Mysuru) – designed with passive cooling, optimized natural lighting, and renewable energy integration.

3. What are energy efficient devices? Give some examples of such devices. 

Ans: The devices which reduce energy consumption and prevent greenhouse emission are called energy-efficient devices. For example-refrigerators, LEDs, and CFLs.

4. How can energy efficient towns be designed? 

Ans: Energy-efficient towns can be designed through eco-friendly planning and sustainable technologies. Green spaces, parks, and tree belts are developed to reduce heat islands and improve air quality, while compact settlements are encouraged to minimize commuting distances. The transport system is made energy efficient by introducing bicycle lanes, pedestrian pathways, and reliable public transport such as metro and electric buses, along with promoting hybrid and electric cars. Houses and buildings are constructed with energy-efficient materials, proper insulation, and fitted with solar panels. Rooftop rainwater harvesting and waste recycling systems are also integrated. For energy and water management, renewable energy sources like solar and wind are adopted, and water is conserved through recycling, wastewater treatment, and smart irrigation. Community participation is equally important, with awareness programs to promote eco-friendly practices. A good example is Auroville in Tamil Nadu, which incorporates renewable energy, eco-housing, and community-based resource management, making it a model of an energy-efficient town.

5. Define the concept of energy auditing. How can it be helpful in energy conservation? 

Ans: The process of understanding the use of energy on the basis of business analysis is called energy auditing. Energy auditing can be used to conserve energy by proposing improvements to help save energy and eventually reduce electricity utility bills.

6. Mention the advantages and limitations of using solar energy. 

Ans: Solar energy is defined as the energy which is obtained from solar radiation. The advantages of solar energy such as it reduce electricity bills, it has diverse applications, and it has low maintenance costs. Despites of several advantages of solar energy, it has several limitations also such as, it is weather dependent, solar energy is expensive, uses a lot of space, etc.

7. Write short note on importance of energy in your daily life. 

Ans: Energy is present in our daily life. We need the energy to work, walk, move, play, eat everything. Apart from that energy is also used in household works, schools, and businesses. Energy is also used as fuel. Therefore, energy serves as a very important factor in our lives.

8. Justify the statement that ‘the energy is most important input for economic growth and human development. 

Ans: Energy serves as the most important input for economíc growth and human development. This is because most of the modern services are based upon different types of forms of energy as the energy affects health, education, safe water and communication.

9. How can we conserved energy at community level for housing complexes.

Ans: Energy can be conserved at the community level for housing complexes by adjusting day-to-day behavior which includes replacement of light bulbs, use of smart power strips, use of energy-efficient appliances and installment of smart thermostats.