MEDIUM
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Which pipeline is crucial for transporting natural gas from Kakinada in Andhra Pradesh to Bharuch in Gujarat?

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Important Questions on Microbes in Human Welfare

HARD
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Explain the principle and working of a nuclear reactor with the help of a labelled diagram.
MEDIUM
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Give two advantages of fuel cells.
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
The ratio of mass densities of nuclei of  40Ca and 16O is close to:
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Write down any two uses of formic acid.
MEDIUM
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Draw a labelled diagram of typical biogas plant.
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Sodium salt of which acid is used as a food preservative?
MEDIUM
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
A 2 MeV neutron is emitted in a fission reactor. If it looses half of its kinetic energy in each collision with a moderator atom, how many collisions must it undergo to achieve thermal energy of 0.039 eV ?
MEDIUM
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Define fuel cell and write its two advantages.
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
A device that converts energy of combustion of fuels like hydrogen and methane, directly into electrical energy is known as:
HARD
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Draw a neat labelled diagram of H2-O2 fuel cell. Write the reaction which occurs at cathode of the cell?
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
What gases are produced in anaerobic sludge digesters?
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Define biogas.
HARD
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Describe the process of secondary treatment given to municipal wastewater (sewage) before it can be released into freshwater bodies. Mention another benefit provided by this process.
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
BOD of wastewater is estimated by measuring the amount of
MEDIUM
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Describe how biogas is generated from activated sludge. List the components of biogas.
MEDIUM
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Primary treatment of sewage waste involves which processes ?
MEDIUM
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Wastewater treatment generates a large quantity of sludge, which can be treated by
HARD
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Explain the process of secondary treatment given to the primary effluent up to the point it shows significant change in the level of biological oxygen demand BOD in it.
MEDIUM
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
How can sewage be used to generate biogas? Explain.
MEDIUM
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
In context of secondary treatment of sewage, ‘flocs’ is associated with which microbes?