With reference to ‘fuel cells’ in which hydrogen-rich fuel and oxygen are used to generate
electriity, 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?
Environment
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Biofertilizers/Fuels
Environment › Biofertilizers/Fuels
Options
Answer
(A)
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Environment › Biofertilizers/Fuels
With reference to the usefulness of the by-products of sugar industry, which of the following
statements is/are correct?
(1). Bagasse can be used as biomass fuel for the generation of energy.
(2). Molasses can be used as one of the feedstocks for the production of synthetic chemical
fertilizers.
(3). Molasses can be used for the production of ethanol. Select the correct answer using the
codes given below.Options
Answer
(C)
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Environment › Biofertilizers/Fuels
Biomass gasification is considered to be one of the sustainable solutions to the power crisis in India. In this context which of the following statements is/are correct? 1. Coconut shells, groundnut shells and rice husk can be used in biomass gasification 2. The combustible gases generated from biomass gasification consist of hydrogen and carbon dioxide only 3. The combustible gases generated from biomass gasification can be used for direct heat generation but not in internal combustion engines.
Options
Answer
(A)
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Environment › Biofertilizers/Fuels
Other than Jatropha curcas, why is Pongamia pinnata also considered a good option for the production of biodiesel in India?
1. Pongamia pinnata grows naturally in most of the arid regions of India
2. The seeds of Pongamia pinnata are rich in lipid content of which nearly half is oleic acid
Which of the statement given above is/are correct?Options
Answer
(C)
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Climate Change