Subject: 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.

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.

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?

It is possible to produce algae based biofuels, but what is/are the likely
limitation(s) of developing countries in promoting this industry?
1. Production of algae based biofuels is possible in seas only and not on continents.
2. Setting up and engineering the algae based biofuel production requires high level of
expertise/technology until the construction is completed.
3. Economically viable production necessitates the setting up of large scale facilities which
may raise ecological and social concerns.
Select the correct answer using the code given below:

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 adyantage 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?

According to India’s National Policy on Biofuels, which of the following can be used as
raw materials for the production of biofuels?
1. Cassava
2. Damaged wheat grains
3. Groundnut seeds
4. Horse gram
5. Rotten potatoes
6. Sugar beet
Select the correct answer using the code given below: