PYQ Question

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 ma

August 6, 2026 en

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?

A. 1 only
B. 2 and 3 only
C. 4 only
D. 1, 2, 3 and 4

Answer: B

Explanation

Statement 1 is not correct and statements 2 and 3 are correct: H-CNG is a blend of hydrogen and CNG, the ideal hydrogen concentration being 18%. Compared to conventional CNG, use of H-CNG can reduce emission of carbon monoxide up to 70% and 15% reduction in total hydro carbon emissions, besides enabling up to 5% savings in fuel. Statement 4 is not correct: In its report to the Supreme Court, the EPCA has estimated that to fuel Delhi’s 5,500 buses, about 400 tonnes H-CNG would be needed per day. Setting up four fuel- dispensing facilities would cost Rs 330 crore, which can be funded from the Environment Compensation Charge (ECC) fund made up of cess on commercial vehicles entering Delhi, it said. For consumers who pay Rs 42 per kg for CNG, the cost of H-CNG would not be more than Rs 43 per kg.