Tag: occurrence of carbon compounds in nature

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Questions Related to occurrence of carbon compounds in nature

Multiple choice chemistry occurrence of carbon compounds in nature substances, objects and energy alternative fuels and energy sources alternative sources of energy

What typical catalyst is used to make biodiesel?

  1. acid catalyst

  2. platinum

  3. ultraviolet light

  4. base catalyst
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Biodiesel is a renewable alternative fuel created from vegetable oils, animal fats and greases through a chemical process. The chemical process involves reaction of natural oils with an alcohol in the presence of a catalyst (usually sodium hydroxide [$NaOH$] or potassium hydroxide [$KOH$] and then refining the mixture to create molecules which can be easily burned in a diesel engine.

Multiple choice chemistry occurrence of carbon compounds in nature substances, objects and energy alternative fuels and energy sources alternative sources of energy

Which of the following is/are true for hydrogen as the future fuel?

  1. Efforts are being taken to reduce the cost of production of hydrogen.

  2. Better and safer methods of transportation and storage of hydrogen are being worked out.

  3. If these problems are solved, hydrogen will prove to be an ideal fuel not only for rockets but also for vehicles and domestic use.

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

The following is/are true for hydrogen as the future fuel.
Efforts are being taken to reduce the cost of production of hydrogen.
Better and safer methods of transportation and storage of hydrogen are being worked out.
If these problems are solved, hydrogen will prove to be an ideal fuel not only for rockets but also for vehicles and domestic use.

Multiple choice chemistry occurrence of carbon compounds in nature substances, objects and energy alternative fuels and energy sources alternative sources of energy

Sewer gases may include:

  1. hydrogen sulfide, ammonia and methane

  2. esters and carbon monoxides

  3. sulfur dioxide and nitrogen oxides

  4. all of them
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sewer gases may include hydrogen sulfide, ammonia, methane, esters, carbon monoxide, sulfur dioxide and nitrogen oxides.
Sewer gas is a generic name for the collection of gases and airborne agents
that often accompany sewage and the natural processes and reactions associated with sewage processing and the decomposition of organic materials.

Multiple choice chemistry occurrence of carbon compounds in nature substances, objects and energy alternative fuels and energy sources alternative sources of energy

Sewage gases are produced by by the decomposition of :

  1. organic household

  2. industrial wastes

  3. both A and B

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sewer gas is a complex mixture of toxic and nontoxic gases produced and collected in sewage systems by the decomposition of organic household or industrial wastes, typical components of sewage. Sewer gases may include hydrogen sulfide, ammonia, methane, esters, carbon monoxide, sulfur dioxide and nitrogen oxides.

Multiple choice chemistry occurrence of carbon compounds in nature substances, objects and energy alternative fuels and energy sources alternative sources of energy

 Which of the following is/are the advantage(s) of using hydrogen as an automobile fuel?

  1. The amount of energy released per unit weight of the fuel is very low.
  2. The combustion hydrogen does not produce polluting emissions of CO, $CO _2$, oxides of nitrogen, and sulphur, aldehydes etc.

  3. The technology required for use of hydrogen fuel is simple and cost effective.

  4. The fuel cells using catalytic combustion of hydrogen have efficiency of 70-80 percent.
Reveal answer Fill a bubble to check yourself
B,C Correct answer
Explanation

The following are the advantages of using hydrogen as an automobile fuel.
The amount of energy released per unit weight of the fuel is very high.
The combustion hydrogen does not produce polluting emissions of CO, $CO _2$, oxides of nitrogen, and sulphur, aldehydes etc. Here, combustion product of hydrogen is water with few traces of nitrogen oxides. So no pollution is caused.
The technology required for use of hydrogen fuel is simple and cost effective.
The fuel cells using catalytic combustion of hydrogen have efficiency of 70-80 percent.

Multiple choice chemistry occurrence of carbon compounds in nature substances, objects and energy alternative fuels and energy sources alternative sources of energy

Methane gas is an organic fuel obtained from the sources mentioned here. Which of the following is not a correct source?

  1. Coal gas

  2. Molasses

  3. Natural gas

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

Molasses is a factory waste from sugar industry. It does not contain any traces of methane. So, methane is not obtained from molasses.

Multiple choice chemistry occurrence of carbon compounds in nature substances, objects and energy alternative fuels and energy sources alternative sources of energy

How wars and attacks can act as reason for energy crisis?

  1. Wars between countries can also hamper supply of energy specially if it happens in Middle East countries like Saudi Arabia, Iraq, Iran, Kuwait, UAE or Qatar

  2. It will attract MNCs to invest int those countries

  3. It will cause the death of people

  4. It will decrease the price of fossil fuels
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Wars between countries can also hamper supply of energy specially if it happens in Middle East countries like Saudi Arabia, Iraq, Iran, Kuwait, UAE or Qatar. Thats what happened during 1990 Gulf war when price of oil reached its peak causing global shortages and created major problem for energy consumers.

Multiple choice chemistry occurrence of carbon compounds in nature substances, objects and energy alternative fuels and energy sources alternative sources of energy

Which of the following is not true about Biogas? 

  1. It contains methane

  2. Burns without smoke

  3. Leaves ash behind

  4. Produced by anaerobic decomposition of animal and plant waste
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Higher the methane content, higher the calorific value. Pure $CH _4$ has a Gross Calorific Value of 39.8 $MJ/m^3$. the rate of combustion of biogas is quite high as it is produced by anaerobic decomposition of animal and plant waste.
It does not leave any ash behind after burning as cow dung and other organic matter is used in the preparation of biogas.