Tag: components and importance of food

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Multiple choice components and importance of food science of kitchen evs

Biogas consists of

  1. CO$ _2$, C$ _2$H$ _5$OH, H$ _2$
  2. CH$ _4$, CO$ _2$, H$ _{2}$
  3. CH$ _{4}$, SO$ _{2}$, H$ _{2}$
  4. C$ _{2}$H$ _6$, CO, H$ _{2}$
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%).
Hence, option B is correct.

Multiple choice components and importance of food science of kitchen evs

How can you contribute to the maintenance of green wealth of your locality?

  1. Taking care of the plants and trees growing in or around my locality.

  2. Plant more and more trees.

  3. Encourage the people in my locality to plant more trees.

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

I can help in maintaining the green wealth of my locality by taking care of the plants and trees growing in or around my locality. I can plant more and more trees. I can also encourage the people in my locality to plant more trees by informing them about the importance of growing trees. I can make young children aware of the effects that deforestation has on our environment and on our planet. I can also ask them to water the plants daily, which will take very little of their time. I believe planting new trees is as important as taking care of the existing trees.

Multiple choice components and importance of food science of kitchen evs

What can you as an individual do to reduce your consumption of the various natural resources?

  1. Stop cutting of trees

  2. Waste electricity

  3. Never recycle

  4. Never reuse
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
I can do following to reduce my consumption of various natural resources:
  • I will prefer walking and cycling while commuting to short distances.
  • I will avoid wastage of water as much as possible.
  • I will minimize my usage of electricity.
  • I will use public transport; instead of private transport.
Multiple choice components and importance of food science of kitchen evs

Biogas can be a good substitute for

  1. Fuelwood

  2. Petroleum and oil

  3. Coal

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

In many areas, biogas can be used as a replacement for fuels like firewood and dried dung for their energy consumption. Replacing firewood with biogas would have a positive effect on deforestation. That would improve  the local environments, ecosystems, problems with erosion etc. Hence option A is correct.

Multiple choice components and importance of food science of kitchen evs

What changes would you suggest in your home in order to be environment-friendly?

  1. Plant more trees

  2. Hazardous waste materials like paint, oil, ammonia and other strong chemical solutions should never be disposed

  3. Keep the light on

  4. Throw garbage in water bodies
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
I would suggest the following environment-friendly changes in my home:
• To ensure that there is no wastage of water, repair of all the leaky taps will be done.
• Efforts will be made to prevent wastage of water from the overflowing overhead water storage tanks.
• Instead of bulbs, fluorescent tubes which consume less electricity will be fitted.
• To save electricity fans, air conditioners, geysers, room heaters and other electronic gadgets! appliances will be used only when required. This will prevent wastage of power.
• Provision will be made to collect rainwater in such a way that the groundwater reservoir is recharged.
• Sufficient number of plants such as herbs and shrubs and if possible trees in the locality will be planted to keep the environment clean and pollution free.
Multiple choice components and importance of food science of kitchen evs

List five things you have done over the last one week to
(a) Conserve our natural resources
(b) Increase the pressure on our natural resources

  1. Throw biodegradable and non-biodegradable waste into separate bins. And use air conditioners.

  2. Use plastics and polythene bags for carrying goods.

  3. Harvest rainwater.

  4. Travel by a CNG bus for long distances and walk for short distances.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Conserve our natural resources.
Answer: For conserving our natural resources, the five things which I did in the last one week:
I used bicycle for going to school.
I took bucket bath and stopped using the shower.
I used old envelopes for doing rough work during my homework.
I reduced my timing for watching TV.
I took a public transport bus while going to a relative’s place.

  • Increase the pressure on our natural resources.
Answer: Five things which increase pressure on natural resources:
I played video games for a long period on one day.
I forgot to switch off the light of my bedroom and slept.
I went to a water-park, where too much water was being wasted.
I threw away some plastic bottles which could have been reused.
I made paper planes and played with them.
Multiple choice components and importance of food science of kitchen evs

Biogas is a mixture of

  1. ${CO +H _2 +CO _2}$
  2. ${CH _4+CO+CO _2}$
  3. ${CH _4 +CO _2+H _2}$
  4. ${CO +CO _2 + NO _2}$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Biogas is principally a mixture of methane (CH4) and carbon dioxide (CO2) along with hydrogen (H2) gas in small amount. It can be collected from landfills, covered lagoons, or enclosed tanks called anaerobic digesters. Biogas is commonly made from animal manure, sludge settled from wastewater, and at landfills containing organic wastes. Hence option C is correct.

Multiple choice components and importance of food science of kitchen evs

For the production of biogas, the biogas plant requires

  1. Molasses

  2. Cattle dung

  3. Vegetable peels

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

The biogas plant helps in the degradation of the organic waste to form gases like methane, carbon dioxide, hydrogen and some other gases in traces. The wastes from various different sources can be used for the production of biogas. The molasses are considered as the industrial wastes which can be degraded by the bacterial action. The cattle and animal dung is used in the biogas plant. The vegetable peels, fruit peel and other domestic wastes are used as the sources for the production of biogas. 

Thus, the correct answer is option D. 

Multiple choice components and importance of food science of kitchen evs

Mixture of gases formed when the slurry of animal dung and water is allowed to ferment in the absence of oxygen. 

  1. Biomass

  2. Biogas

  3. Methanogens

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

Definition of biogas- The gas fermentation of animal during which takes place in the absence of air due to the presence of anaerobic bacteria. 

Multiple choice components and importance of food science of kitchen evs

Solar constant at height at 83 km in

  1. 1 kcal/c$m^2$ /min
  2. 1 cal/c$m^2$/min
  3. 2 kcal/c$m^2$/min
  4. 2 cal/c$m^2$/min
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The solar constant is the amount of solar energy reaching the upper atmosphere. The standard value is approximately 2 calories per square centimeter per minute.