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Mayank1444

@mayank1444

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Joined: Oct 11, 2021
Last seen: Nov 14, 2021

Topics: 0 / Replies: 2157

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Answer to: Which one of the following is being tried in India as a biofuel substitute for fossil fuels?

Correct answer: (2) Jatropha

4 years ago

Forum

Biology

Answer to: Which one of the following is the correct percentage of the two (out of the total of 4) greenhouse gases that contribute to total global warming?

Correct answer: (2) CFCs 14%, Methane 20%

4 years ago

Forum

Biology

Answer to: Which one of the following pairs is mismatched? (1) Solar energy - green house effect (2) Fossil fuel burning - release of CO2

Correct answer: (2) Fossil fuel burning - release of CO2

4 years ago

Forum

Biology

Answer to: Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste waters into natural surface waters is

Correct answer: (2) < 10 ppm

4 years ago

Forum

Biology

Answer to: Photochemical smog pollution does not contain

Correct answer: (4) Carbon dioxide

4 years ago

Forum

Biology

Answer to: Montreal protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year

Correct answer: (2) 1987

4 years ago

Forum

Biology

Answer to: In which one of the following the BOD (Biochemical Oxygen Demand) of sewage (s), distillery effluent (DE), paper mill effluent (PE) and sugar mill effluent (SE) have been arranged in ascending order?

Correct answer: (4) PE < S < SE < DE

4 years ago

Forum

Biology

Answer to: Lead concentration in blood is considered alarming if it is

Correct answer: (4) 30 mg/100 ml

4 years ago

Forum

Biology

Answer to: Recently Govt. of India has allowed mixing of alcohol in petrol. What is the amount of alcohol permitted for mixing in petrol?

Correct answer: (4) 10 - 15%

4 years ago

Forum

Biology

Answer to: Prolonged liberal irrigation of agricultural fields is likely to create the problem of

Correct answer: (1) Salinity

4 years ago

Forum

Biology

Answer to: Which of the following is not used for disinfection of drinking water?

Correct answer: (3) Phenyl

4 years ago

Forum

Biology

Answer to: Identify the correctly matched pair. (1) Montreal Protocol - Global warming (2) Basal Convention - Biodiversity Conservation

Correct answer: (4) Kyoto Protocol - Climatic change

4 years ago

Forum

Biology

Answer to: D.D.T. is (1) not a pollutant (2) a non-degradable pollutant

Correct answer: (2) a non-degradable pollutant

4 years ago

Forum

Biology

Answer to: Which of the following is absent in polluted water?

Correct answer: (2) Hydrilla

4 years ago

Forum

Biology

Answer to: Escherichia coli is used as an indicator organism to determine pollution of water with

Correct answer: (1) faecal matter

4 years ago

Forum

Biology

Answer to: A major component of gobar gas is

Correct answer: (4) Methane

4 years ago

Forum

Biology

Answer to: In 1984, Bhopal gas tragedy took place because methyl isocyanate

Correct answer: (3) reacted with water

4 years ago

Forum

Biology

Answer to: Maximum bioconcentration of pesticide residues is usually found in birds that exclusively feed on

Correct answer: (2) fish

4 years ago

Forum

Biology

Answer to: Which of the following is the use of lichens in case of pollution?

Correct answer: (4) They act as bioindicators of pollution

4 years ago

Forum

Biology

Answer to: A body of mass 5 kg is moving with a velocity of 10 m/s. A force is applied to it so that in 25 seconds, it attains a velocity of 35 m/s. Calculate the value of the force applied.

Mass of the body = 5 kg Initial velocity u = 10 m/s Final velocity v = 35 m/s Time t = 25 s Acceleration a = = = 1 m/s2 Force = m x a = ...

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