Tag: protecting our environment

Questions Related to protecting our environment

Mulching is a process, that helps in 

evs - i rules are for everyone soil and its conservations soil pollution-control protecting our environment sustainability of natural resources adaptations - mangrove swamps, fast flowing rivers and treetops halophiles

  1. Moisture conservation

  2. Weed control

  3. Soil fertility

  4. Both A and B

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Correct Option: D
Explanation:

Mulch is a protective layer of a material, that is spread on top of the soil. Mulches can either be organic - such as grass clippings, straw, bark chips, or inorganic - such as stones, brick chips, and plastic. Materials used as mulches are used to retain soil moisture, regulate soil temperature, suppress weed growth, and for aesthetics. They are applied to the soil surface, around trees, paths, flower beds, to prevent soil erosion on slopes, and in production areas for flower and vegetable crops. Mulch layers are normally two inches or more deep when applied.

Biogas is a good substitute for

commercial applications management of natural resources unequal distribution of resources protecting our environment rules are for everyone

  1. Natural gas

  2. Crude oil

  3. Coal

  4. All of the above

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Correct Option: D

Bioenergy is the energy obtained from

commercial applications management of natural resources unequal distribution of resources protecting our environment rules are for everyone

  1. Coal

  2. Natural gas

  3. Biomass

  4. Petroleum

Show answer
Correct Option: C
Explanation:
Biomass is the amount of organic matter present in an organism. It is the stored form of energy in an organism. Biomass is used to produce bioenergy. Biomass can be of various types such as woods, crops, landfill gas etc. Biomass can be converted to various forms to produce biofuels, biogas etc. Highest amount of biomass is present in plants as they trap solar energy and convert it into mechanical energy in the form of stored food. 
So, the correct answer is 'Biomass'.

Biogas contains

commercial applications management of natural resources unequal distribution of resources protecting our environment rules are for everyone

  1. $CH _4+CO+CO _2$

  2. $CH _4+CO _2+H _2$

  3. $CO+CO _2+H _2$

  4. $CO+CO _2+NO _2$

Show answer
Correct Option: B
Explanation:
Biogas is a form of energy produced from anaerobic decomposition of waste material and organic matter. It is a renewable source of energy and a good alternative in place of fossil fuels which are depleting with time. Biogas is produced by methanogenic bacteria which breakdown organic matter in the absence of oxygen. They produce biogas which is a mixture of gases like methane (CH4), carbon dioxide (CO2) and hydrogen (H2) in different composition.
So, the correct answer is 'CH4 + CO2 + H2 '.

Bioenergy is obtained from

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  1. Petroleum

  2. Natural gas

  3. Biomass

  4. Synthetic fuel

Show answer
Correct Option: C
Explanation:
Biomass is the amount of organic matter present in an organism. It is the stored form of energy in an organism. Biomass is used to produce bioenergy. Biomass can be of various types such as woods, crops, landfill gas etc. Biomass can be converted to various forms to produce biofuels, biogas etc. Bioenergy is renewable source energy because it can be replenished over a period of time.
So, the correct answer is 'Biomass'.

Hot water of Manikaran is used for generating electricity. It is known as 

commercial applications management of natural resources unequal distribution of resources protecting our environment rules are for everyone

  1. Solar energy

  2. Biomass energy

  3. Geothermal energy

  4. Hydroelectric energy

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Correct Option: C
Explanation:
A. Solar energy is energy generated from heat of sun.
B. Biomass energy is generated from the biomass i.e. organic matter of plants and animals which in turn, contains the stored solar energy.
C. Geothermal energy is the energy generated from heat of earth. 
D. Hydroelectric energy is generated using water which is passed over turbines which flow at a high speed and electricity is generated.
Manikaran (located in Himachal Pradesh) hot springs are used to generate geothermal energy because the heat of the water is used to produce electricity.
So, the correct answer is 'Geothermal energy'.

The scientist could who first demonstrated that nuclear energy be harnessed to produce electrical energy was :

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  1. Homi Bhabha

  2. Enrico Fermi

  3. W B Lewis

  4. P A M Dirac

Show answer
Correct Option: B
Explanation:

Enrico Fermi (1901-1954) was an Italian physicist and recipient of the 1938 Nobel Prize in Physics. He created the world's first nuclear reactor, the Chicago Pile- 1.

So, the correct answer id 'Enrico Fermi'.

Planetesimal hypothesis is given by?

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  1. Hoyle in $1939$

  2. Lyttleton in $1939$

  3. Kent in $1946$

  4. More than one correct answer

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Correct Option: A

__________ is the element used to produce nuclear energy

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  1. Palladium

  2. Strontium

  3. Uranium

  4. Rhodium

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Correct Option: C

In which form energy flow occur in ecosystem?

commercial applications management of natural resources unequal distribution of resources protecting our environment rules are for everyone

  1. Solar energy

  2. Heat energy

  3. Chemical energy

  4. Electric energy

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Correct Option: A