In the context of proposals to the use of hydrogen-enriched CNG (H-CNG) as fuel for buses in public transport, consider the following statements: 1. The main advantage of the use of H-CNG is the elimination of carbon monoxide emissions. 2. H-CNG as fuel r

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Q: 83 (IAS/2019)
In the context of proposals to the use of hydrogen-enriched CNG (H-CNG) as fuel for buses in public transport, consider the following statements:
1. The main advantage of the use of H-CNG is the elimination of carbon monoxide emissions.
2. H-CNG as fuel reduces carbon dioxide and hydrocarbon emissions.
3. Hydrogen up to one-fifth by volume can be blended with CNG as fuel for buses.
4. H-CNG makes the fuel less expensive than CNG.
Which of the statements given above is / are correct?
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question_subject: 

Science

question_exam: 

IAS

stats: 

0,122,64,13,122,10,41

keywords: 

{'hydrogen': [0, 0, 1, 3], 'hydrocarbon emissions': [0, 0, 0, 1], 'carbon monoxide emissions': [0, 0, 0, 1], 'cng': [0, 0, 1, 2], 'fuel': [1, 0, 5, 14], 'public transport': [0, 0, 0, 1], 'carbon dioxide': [2, 0, 5, 6], 'buses': [0, 1, 0, 1], 'main advantage': [1, 0, 0, 2]}