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Environmental Issues · Question 6

NEET (UG) 2022MCQEasy📈 Topic in 38% papers+4−1
1

The entire fleet of buses in Delhi were converted to CNG from diesel. In reference to this, which one of the following statements is false?

  1. CNG burns more efficiently than diesel
  2. The same diesel engine is used in CNG buses making the cost of conversion low
  3. It is cheaper than diesel
  4. It cannot be adulterated like diesel

Answer

(2) The same diesel engine is used in CNG buses making the cost of conversion low

Solution

As per NCERT, CNG is better than diesel because it burns most efficiently (very little remains unburnt), it is cheaper than petrol or diesel, and it cannot be siphoned off by thieves or adulterated like petrol or diesel.

The vehicles have to be converted to run on CNG (engines are modified), and the main problem in switching over is laying pipelines and ensuring uninterrupted supply. So the statement that the same diesel engine is used, making conversion cheap, is false.

Answer: (2)

Out of syllabusNEET (UG) 2022

Keep practising — Environmental Issues

2

Given below are two statements: In the light of the above statements, choose the most appropriate answer from the options given below:

  1. Both Statement I and Statement II are correct
  2. Both Statement I and Statement II are incorrect
  3. Statement I is correct but Statement II is incorrect
  4. Statement I is incorrect but Statement II is correct
Out of syllabusNEET (UG) 2022
3

Why CNG is considered better fuel than diesel? Choose the most appropriate answer from the options given below :

  1. C, D and E only
  2. A, B, C and E only
  3. A, C and D only
  4. A, B, D and E only
Out of syllabusNEET (UG) 2022 (Phase 2)
4

Dobson units are used to measure thickness of :

  1. Troposphere
  2. CFCs
  3. Stratosphere
  4. Ozone
Out of syllabusNEET (UG) 2021
5

Snow-blindness in Antarctic region is due to

  1. High reflection of light from snow
  2. Freezing of fluids in the eye by low temperature
  3. Inflammation of cornea due to high dose of UV-B radiation
  4. Damage to retina caused by infra-red rays
Out of syllabusNEET (UG) 2020
6

Montreal protocol was signed in 1987 for control of

  1. Disposal of e-wastes
  2. Transport of Genetically modified organisms from one country to another
  3. Emission of ozone depleting substances
  4. Release of Green House gases
Out of syllabusNEET (UG) 2020
7

Which of the following protocols did aim for reducing emission of chlorofluorocarbons into the atmosphere?

  1. Gothenburg Protocol
  2. Geneva Protocol
  3. Montreal Protocol
  4. Kyoto Protocol
Out of syllabusNEET (UG) 2019
8

Polyblend, a fine powder of recycled modified plastic, has proved to be a good material for :

  1. Construction of roads
  2. Making tubes and pipes
  3. Making plastic sacks
  4. use as a fertilizer
Out of syllabusNEET (UG) 2019
9

Which of the following pairs of gases is mainly responsible for green house effect?

  1. Nitrogen and Sulphur dioxide
  2. Carbon dioxide and Methane
  3. Ozone and Ammonia
  4. Oxygen and Nitrogen
Out of syllabusNEET (UG) 2019
10

Which of these following methods is the most suitable for disposal of nuclear waste?

  1. Dump the waste within rocks under deep ocean
  2. Bury the waste within rocks deep below the Earth’s surface
  3. Shoot the waste into space
  4. Bury the waste under Antarctic ice-cover
Out of syllabusNEET (UG) 2019
11

In stratosphere, which of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen?

  1. Carbon
  2. Cl
  3. Fe
  4. Oxygen
Out of syllabusNEET 2018

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All NEET Botany chapters
Class 11The Living WorldBiological ClassificationPlant KingdomMorphology of Flowering PlantsAnatomy of Flowering PlantsCell: The Unit of LifeCell Cycle and Cell DivisionTransport in PlantsMineral NutritionPhotosynthesis in Higher PlantsRespiration in PlantsPlant Growth and Development
Class 12Reproduction in OrganismsSexual Reproduction in Flowering PlantsPrinciples of Inheritance and VariationMolecular Basis of InheritanceStrategies for Enhancement in Food ProductionMicrobes in Human WelfareOrganisms and PopulationsEcosystemBiodiversity and ConservationEnvironmental Issues
Other chaptersBiomolecules (Biology)