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Question

Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R.

 Assertion A : Although internal-combustion engines used in today's vehicles can be adapted to burn hydrogen, hydrogen powered combustion engines probably are not the future of hydrogen fuelled vehicles. 

Reason R : It is more efficient to convert hydrogen energy directly to electricity using fuel cells. 

In the light of the above statements, choose the correct answer from the options given below : 

This question was previously asked in
UGC NET 2022 Paper 1 Question Paper (22-Oct-2022) (Shift 2)
The correct answer is

Both A and R are true and R is the correct explanation of A

To address this question, we need to evaluate both the Assertion (A) and the Reason (R) statements.

  1. Assertion A: The statement suggests that although current internal-combustion engines can be adapted to burn hydrogen, this is not likely the future path for hydrogen-fueled vehicles.
  2. Reason R: This statement claims that it's more efficient to convert hydrogen energy directly to electricity using fuel cells.

Let's analyze each part:

  • Hydrogen combustion engines are technically feasible but not as efficient as fuel cells. Fuel cells convert chemical energy directly into electrical energy with greater efficiency and fewer emissions compared to combustion engines.
  • Fuel cells generate electricity by combining hydrogen with oxygen, with water being the primary byproduct, leading to a cleaner process compared to combustion, which may still emit some nitrogen oxides due to high-temperature operation.
  • Therefore, investing in fuel cell technology is more promising for future developments in hydrogen vehicles due to efficiency and environmental benefits.

Based on this reasoning:

  1. Both A and R are true. Assertion A accurately describes the current and potential future developments in hydrogen technology for vehicles.
  2. Reason R correctly explains Assertion A. The efficiency of fuel cells over combustion engines aligns with the argument presented in the assertion.

Therefore, the correct answer is: Both A and R are true and R is the correct explanation of A.

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