Loading...
UPSC 2015: With reference to 'fuel cells' in which hydrogen-rich fuel and oxygen are used to generate electricity, consider the following statements: 1. If pure hydrogen is used as a fuel, the fuel cell emits heat and water as by-products. 2. Fuel cells can be used for powering buildings and not for small devices like laptop computers. 3. Fuel cells produce electricity in the form of Alternating Current (AC). Which of the statements given above is/are correct?
(a)1 only
(b)2 and 3 only
(c)1 and 3 only
(d)1, 2 and 3
Attempt This Question
Not attemptedCorrect Answer: (a) 1 only
Fuel cells running on pure hydrogen combine hydrogen and oxygen to give electricity, with heat and water (H₂O) as the only by-products. They generate direct current (DC) power, which can be converted to AC through an inverter; therefore statement 3 is wrong. Miniature proton-exchange-membrane (PEM) fuel cells are already used in portable electronics and military laptops, so statement 2 is also wrong. Hence only statement 1 is correct.
Related Current Affairs
Related UPSC Questions
More from Energy & Environment
2014moderate
With reference to technologies for solar power production, consider the following statements: 1. 'Photovoltaics' is a technology that generates electr
2014moderate
In India, cluster bean (Guar) is traditionally used as a vegetable or animal feed, but recently the cultivation of this has assumed significance. Whic
2017moderate
It is possible to produce algae-based biofuels, but what is/are the likely limitation(s) of developing countries in promoting this industry? 1. Produc
Related Science & Technology Topics
2015Science & Technology Institutions
Which of the following statements is/are correct regarding National Innovation Foundation–India (NIF)? 1. NIF is an autonomous body of the Department
2015Health & Diseases
With reference to the use of nanotechnology in health sector, which of the following statements is/are correct? 1. Targeted drug delivery is made poss
Frequently Asked Questions
What is the correct answer to this UPSC 2015 Science & Technology question?▼
The correct answer is option (a): 1 only. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Energy & Environment question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2015, GS Paper 1, as Question 95. It falls under Science & Technology > Energy & Environment.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Energy & Environment?▼
UPSC has asked 48 questions from Energy & Environment (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.