Tag: rules are for everyone

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

Charged particles from the sun that travel through space at high speeds are called:

  1. Radiation

  2. The aurora

  3. Solar wind

  4. Solar flares
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Solar wind is a stream of charged particles (primarily electrons and protons) released from the upper atmosphere of the Sun, which travels through the solar system.

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

Consider the following statements:
(a) Our energy requirements increase with our standard of living.
(b) We need to look for more and more sources of energy to meet our energy requirements.
Which of the above statement(s) is/are correct?

  1. Only (a)

  2. Only (b)

  3. Both (a) and (b)

  4. Neither (a) nor (b)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The standard of living involves the type of diet and the work we perform every day. The individuals who perform more work require more energy. The energy requirements depend on the lifestyle of every individual. 
The population is expanding day by day. In order to meet the requirements, there is need to search for more sources of energy. Different methods have been used for the increase in the quantity and the quality of the food. 
Thus, the correct answer is option C. 
Multiple choice commercial applications management of natural resources unequal distribution of resources protecting our environment rules are for everyone

Pollution from animal excreta and organic waste from kitchen can be most profitably minimized by 

  1. Storing them in underground storage tanks

  2. Using them for producing biogas

  3. Vermiculture

  4. Using them directly as biofertilizers
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Biogas is a mixture of methane, carbon dioxide and other trace gases which can be converted to heat, electricity or light. Small-scale biogas reactors are designed to produce biogas at the household or community level in rural areas. 

Animal manure and kitchen waste contain a lot of organic matter and generally, the process produces enough biogas for the family to cover at least cooking requirements. Humans produce less excreta, which contains less material that can be converted to biogas than animal dung (e.g., cows). 
However, toilets, if available can directly be linked to the biogas plant, where human faeces are digested together with the other wastes. This option provides a safe treatment of human excreta and thus improves the hygienic situation of the family. 
The availability of a renewable green energy source reduces the use of firewood for cooking and indoor air pollution. Thus, biogas digesters have the potential to minimize health risks and environmental pollution by using human excreta as a resource for producing energy and fertilizer.

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

For biogas production, besides dung an extensive use of which weed is recommended in our country

  1. Mangifera indica

  2. Hydrilla

  3. Eichhornia crassipes

  4. Solanum
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Eichhornia crassipes is an excellent source of biomass because of its extremely high rate of development. One hectare of standing crop thus produce more than 70,000 m$^3$ of biogas.

Thus, the correct answer is option C. 

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

The process in which water vapour changes to liquid is called

  1. Condensation

  2. Evaporation

  3. Transpiration

  4. Precipitation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sun derives the water cycle, heats up water in ocean and seas, and then water vapours evaporate to air. As the vapours move upward the cool temperature there causes it to condense into clouds and they fall as precipitate like rain, hailstone etc.

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

What are the advantage of gobar gas over conventional utilization?

  1. More efficient source of energy

  2. Used as good fertilizer

  3. Reduces the chances of spreading of pathogens

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gobar gas (biogas) is considered an efficient fuel, provides nutrient-rich slurry for fertilizer, and the anaerobic digestion process kills many pathogens present in raw manure.

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

Best economic method to harvest the solar energy is

  1. Solar cell

  2. Energy plantation

  3. Cultivation of sugar cane then energy obtain by burning it

  4. Solar cooker
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The economics of terrestrial growth of vegetation for its energy content is far more favourable than other more technically sophisticated methods of large-scale solar energy conversion. The most traditional is to use the ability of plants to convert the suns energy into fuel molecules; this is cheap, deployable at scale, and provides the energy in easily storable form, but its not very efficient and so needs a lot of land.

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

Gobar gas contains mainly

  1. CH$ _{4}$ + CO$ _{2}$
  2. CH$ _{4}$ + O$ _{2}$
  3. CO$ _{2}$ + H$ _{2}$
  4. CO$ _{2}$ + SO$ _{2}$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Biogas (gobar gas) is primarily methane (CH$ _4$) and carbon dioxide (CO$ _2$) and may have small amounts of hydrogen sulphide (H$ _2$S), moisture and siloxanes.

Thus, the correct answer is option A.

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

Biogas consists of

  1. Carbon monoxide, methane and hydrogen.

  2. Carbon dioxide, methane and hydrogen.

  3. Carbon monoxide, ethane and hydrogen.

  4. Carbon dioxide, ethane and hydrogen.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Biogas consists mostly of methane (CH$ _4$), carbon dioxide (CO$ _2$) and a mix of trace gases including nitrogen, hydrogen sulfide (H$ _2$S), hydrogen and others. Methane is the main constituent (63%) of the biogas. The other major constituent is CO$ _2$ (30%).

Thus, the correct answer is option B.

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

There is a high accumulation of garbage in the past recent days in Bangalore. What would you suggest to the government as to how could the garbage be converted into cooking gas by decomposing. Which organism is involved in the process of conversion?

  1. Klebsiella

  2. Yeast

  3. Methanogen

  4. Clostridium
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Methanogens convert organic products to methane and carbon dioxide. The methanogenic archaea populations play an indispensable role in anaerobic wastewater treatments. It is used as part of the process to treat biodegradable waste and sewage sludge. As part of an integrated waste management system, anaerobic digestion reduces the emission of landfill gas into the atmosphere. 
Therefore, the correct answer is option C.