Tag: commercial applications

Questions Related to commercial applications

A bad firewood is that of

  1. Dalbergia

  2. Bauhinia

  3. Lagersroemia

  4. Terminalia


Correct Option: A

Which should be used for production of bioethanol?

  1. Brassica

  2. Zea mays

  3. Jatropha

  4. Pongamia


Correct Option: B

Which of the following is the most important conventional natural source of energy?

  1. Atomic energy

  2. Biogas

  3. Sunlight

  4. Fossil fuels


Correct Option: D
Explanation:

Conventional source of energy is a type of source which is limited in nature like coal, gas, fuel, minerals etc. they take millions of years to replenish. 

So, the correct answer is 'Fossil fuels'

Which of the following is the way to control vehicular air-pollution in Indian cities ?

  1. Use of CNG as fuel

  2. Use of unleaded petrol in the vehicles

  3. Use of catalytic converter in the vehicles

  4. All of these


Correct Option: D
Explanation:

  1.  CNG produces 45% fewer hydrocarbons than gasoline.
  2. Unleaded petrol doesn't produce lead in the atmosphere.
  3. Catalytic converter reduces emissions of three harmful compounds found in car exhaust which are
  • Carbon monoxide (a poisonous gas)
  •  Nitrogen oxides (a cause of smog and acid rain) 
  • Hydrocarbons (a cause of smog)
  • So, the correct option is 'All of these'.

Lignite is a 

  1. Gaseous fossil fuel

  2. Liquid fossil fuel

  3. Solid fossil fuel

  4. Inorganic mineral


Correct Option: C
Explanation:
Lignite, also known as brown coal, is a combustible sedimentary rock which is formed from naturally compressed peat. It has a low heat content and used as a fuel to generate energy. Since, it is non-renewable source of energy, it is considered as a fossil fuel and because it's a rock, so it is a solid fossil fuel.
So, the correct answer is 'Solid fossil fuel'.

Green fuel is:-

  1. Leaded petrol

  2. Unleaded petrol

  3. Gasohol

  4. Low sulphur diesel


Correct Option: D
Explanation:

Green fuel, also known as Green Petrol, is a type of fuel distilled from plants and animal materials, believed by some to be more environmentally friendly than the widely-used fossil fuels that power most of the world. It contains low amount of sulphur. So the above selected option is correct 

Petrol is known as gasoline in

  1. U.S.A.

  2. U.K.

  3. Parts of India

  4. All of the above


Correct Option: A
Explanation:

Petrol is short term for "refined petroleum or distillate petroleum" In American English, it is called "Gasoline" which is commonly shortened for"gas". It has become popular as the trade name of petrol in the U.S. While UK and India or its part thereof it is called petrol ( British English). 

Hence, the correct answer is 'U.S.A'

Which of the following is a fossil fuel?

  1. Petroleum

  2. Wood

  3. Cow dung

  4. Dry leaves


Correct Option: A
Explanation:

Fossil fuel is a general term for buried combustible geologic deposits of organic materials, formed from decayed plants and animals that have been converted to crude oil, coal, natural gas or heavy oils by exposure to heat and pressure in the Earth's crust over hundreds of millions of years.

For example- petroleum, coal, etc.

What can we observe if petrol gets finished ?

  1. Less vehicles on roads

  2. Less trees around us

  3. Less water around us

  4. More vehicles on roads.


Correct Option: A
Explanation:

If petrol is not there for use, we will be using alternative methods like CNG etc , but they are also limited . So there will be decrease in vehicle use.

So, the correct answer is 'less vehicles on the road'

Biodiesel is obtained from

  1. Jatropha

  2. Cedrus

  3. Eicchornia

  4. Opuntia


Correct Option: A
Explanation:

Biodiesel refers to a vegetable oil or animal fat-based diesel fuel consisting of long-chain alkyl (methyl, ethyl or propyl) esters. Biodiesel is typically made by chemically reacting lipids with an alcohol producing fatty acid esters.

Jatropha oil is produced from the seeds of the Jatropha curcas, a plant that can grow in wastelands across India, and the oil is considered to be an excellent source of bio-diesel. India is keen on reducing its dependence on coal and petroleum to meet its increasing energy demand and encouraging Jatropha cultivation is a crucial component of its energy policy
Large plots of waste land have been selected for Jatropha cultivation and will provide much needed employment to the rural poor of India. Businesses are also seeing the planting of Jatropha as a good business opportunity.

Thus, the correct answer is option A.