Biogas Production

Q. What are methanogens? How do they help to generate biogas? [3]

Q.

Arrange the following in the decreasing order (most important first) of their importance, for the welfare of human society. Give reasons for your answer.

Biogas, Citric acid, Penicillin, Curd.

Q.

Which bacteria are utilised in gobar gas plant?

1. Nitrifying bacteria

2. Methanogens

3. Ammonifying bacteria

4. Denitrifying bacteria

Q.

Which one of the following is mainly produced by the activity of anaerobic bacteria on sewage?

1. Marsh gas

2. Laughing gas

3. Mustard gas

4. Propane

Q. During the anaerobic digestion of organic waste, such as in producing biogas, which one of the following is not degraded?

1. Cellulose
2. Lipids
3. Lignin
4. Hemicellulose

Q.

In gobar gas, the maximum amount is that of

1. Carbon dioxide

2. Butane

3. Methane

4. Propane

Q. Which of the following is true about biogas production?

1. The solid waste/cow dung used as raw material starts to ferment in the air tight chambers
2. Methanogens in the cow dung are the source of methane and hydrogen gas.
3. Anaerobic bacteria such as Methanobrevibacter and Methanomicrobium are responsible for the production of biogas
4. Biogas production leaves behind solid waste that is dumped into landfills.

Q.

Do you think microbes can also be used as a source of energy? If yes, how?

Q. Select the correct statement from following:

1. Activated sludge in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria
2. Biogas is produced by the activity of aerobic bacteria on animal waste (dung)
3. Biogas, commonly called gobar gas, is pure methane
4. Methanobacterium is an aerobic bacterium found in rumen of cattle

Q. Methanogenic bacteria are not found in

1. rumen of cattle
2. bottom of water logged paddy fields
3. gobar gas plant
4. activated sludge

Q. Biogas is produced by the decomposition of the cow dung by the methanogens present in it.

1. True
2. False

Q. A major component of gobar gas is

1. Ethane
2. Butane
3. Methane
4. Ammonia

Q.

Biogas is produced under _____________ conditions by fermentation of biological materials.

1. aerobic and anaerobic

2. anaerobic

3. aerobic

4. none

Q. Supply of oxygen to the biogas plant will have

1. Negative effect
2. No effect
3. None of these
4. Positive effect

Q.

In gobar gas, the maximum amount is that of

1. Butane

2. Methane

3. Propane

4. Carbon dioxide

Q. Besides dung, the weed which can be used in biogas production is

1. Hydrilla
2. Solanum nigrum
3. Eichhornia crassipes
4. None of the above

Q.

What gases are produced in anaerobic sludge digesters?

1. Methane and $C{O}_2$

2. Methane, hydrogen sulphide and $C{O}_2$

3. Methane, hydrogen sulphide and $C{O}_2$

4. Hydrogen sulphide and $C{O}_2$

Q. Regarding the assertion and reason, select the right option.
Assertion: Bioenergy is the energy available from biological sources
Reason: Fossil fuels are examples of bioenergy.

1. The assertion is true, but the reason is false
2. Both the assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Both the assertion and reason are true and the reason is the correct explanation for the assertion.
4. Both the assertion and reason are false.

Q. Label the following in the biogas plant

1. 1.Slurry 2.Digester 3.Biogas holder 4.Spent slurry
2. 1.Spent slurry 2.Digester 3.Biogas holder 4.Slurry
3. 1.Slurry 2.Digester 3.Biogas holder 4.Spent slurry
4. 1.Digester 2.Biogas holder 3.Digester 4.Spent slurry

Q. Which one of the following, produces gas by decomposing the gobar (dung) in a gobar gas?

1. Fungi
2. Virus
3. Algae
4. Methanogenic bacteria

Q.

Gobar gas contains mainly

1. ${\mathrm{CH}}_4+{\mathrm{CO}}_2$

2. ${\mathrm{CH}}_4+{\mathrm{O}}_2$

3. ${\mathrm{CO}}_2+{\mathrm{H}}_2$

4. ${\mathrm{CO}}_2+{\mathrm{SO}}_2$

Q. Write se advantages of biogas energy.

Q. A plant pollinated by bats is

1. Ophrys
2. Salvia
3. Kigellia
4. All of the above

Q.

How do you kill an E.coli bacteria?

Q.

Which of the following is mainly produced by the activity of anaerobic bacteria on cowdung?

1. Marsh gas

2. Laughing gas

3. Propane

4. Mustard gas

Q. State whether true or false.
Spirulina is the major source of biogas production.

1. Eichhhornia crassipes
2. Hydrilla

Q. In which state of India the largest bio-gas plant is located?

1. Maharashtra
2. Rajasthan
3. Gujarat
4. Uttar Pradesh

Q.

The main constituent of biogas is:

1. butane

2. ethane

3. methane

4. alcohol

Q. Biofuel can be produced from:

1. Agricultural waste

2. Organic waste

3. Human waste

4. Electronic waste

Q. For biogas production besides dung, which one of the following weed is recommended in our country?

1. Eichhornia crassipes
2. Mangifera indica
3. Coffea arabica
4. Solanum nigrum