Tag: commercial applications

Questions Related to commercial applications

The interior of a cow-dung pile kept for a few days is quite warm. This is mostly because

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

  1. Cellulose present in the dung is a good insulator .

  2. Bacterial metabolism inside the dung releases heat.

  3. Undigested material releases heat due to oxidation by air.

  4. Dung is dark and absorbs a lot of heat.

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Correct Option: B
Explanation:

At the later stages of decomposition of cowdung, mesophilic micro-organisms decompose the dung, generating heat from exothermic( process which produces heat) processes; such heat generation is associated with the well known phenomenon of the elevated temperature of composting.

Geo-thermal energy is a conventional source of energy.

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

  1. True

  2. False

  3. Nither

  4. Either

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Correct Option: B

Which one of the following is a non-replenishable resource?

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

  1. minerals

  2. forests

  3. mineral fuel

  4. hydroelectricity

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Correct Option: C

An example for fossil fuel is 

commercial applications water and air and their importance natural resources and their types promotion of renewable resources protecting our environment

  1. Copper

  2. Iron

  3. Magnesium

  4. Coal

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Correct Option: D

Which one of the following is a renewable source of energy?

commercial applications water and air and their importance natural resources and their types promotion of renewable resources protecting our environment

  1. Natural gas

  2. Geothermal energy

  3. Diesel

  4. Timber

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Correct Option: B
Explanation:

Geothermal energy is the heat energy which is obtained from the interior of the Earth. However, this energy is not equally available everywhere and is concentrated in some parts of the world such as natural geysers. This is a natural and renewable source of energy that can be used for heating processes in various activities.

Thus, the correct answer is option B. 

Which one is a non-renewable resource ?

commercial applications water and air and their importance natural resources and their types promotion of renewable resources protecting our environment

  1. Coal and minerals

  2. Plants and coal

  3. Water and natural gas

  4. Energy and water

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Correct Option: A
Explanation:
  • A nonrenewable resource is a resource of economic value that cannot be readily replaced by natural means on a level equal to its consumption. For example, Most fossil fuels, such as oil, natural gas, and coal and earth metals, minerals.
  • These resources are considered non-renewable because their formation takes billions of years.
  • Hence coal and minerals are examples for the non-renewable resource.
  • So, the correct answer is 'Coal and minerals'.

Metallic minerals and fossil fuels are

commercial applications water and air and their importance natural resources and their types promotion of renewable resources protecting our environment

  1. Non-renewable resources

  2. Inexhaustible resources

  3. Renewable

  4. None of the above

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Correct Option: A
Explanation:

Resources are of two types, renewable and nonrenewable. Renewable resources are those resources that can be renewed and replenished. Nonrenewable resources are those resources that cannot be renewed or replenished. Examples of renewable resources include water, solar, wind. Examples of nonrenewable resources include metallic minerals and fossil fuels. 

Thus, the correct answer is 'Non-renewable resources'.

Non-conventional source of energy is

commercial applications water and air and their importance natural resources and their types promotion of renewable resources protecting our environment

  1. Wood

  2. Biogas/Solar Energy

  3. Coal

  4. Petroleum

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Correct Option: B
Explanation:
  1. Non-conventional sources of Energy. Natural resources like wind, tides, solar, biomass, etc generate energy which is known as “Non-conventional resources.
  2. Solar energy is the most important non-conventional source of energy and it gives non-polluting environment-friendly output and is available in abundant.
  3. Biogas can be produced from raw materials such as agricultural waste, manure, municipal waste, plant material, sewage, green waste or food waste. Biogas is a renewable energy source. so, option biogas / solar energy.

Fuel wood is

commercial applications water and air and their importance natural resources and their types promotion of renewable resources protecting our environment

  1. Renewable source of energy

  2. Source of alcohol

  3. Source of biogas

  4. Source of petroleum gas

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Correct Option: A

A non-renewable resource is

commercial applications water and air and their importance natural resources and their types promotion of renewable resources protecting our environment

  1. Soil fertility

  2. Rainfall

  3. Biological species

  4. Wildlife

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Correct Option: C
Explanation:

A non-renewable source of energy is atype of resource which cannot be replenished back or take a very long time to replenish back, so biological species once lost cannot come back.

So, the correct option is 'Biological species'.