How many molecules are present in 22.4 L of an ideal gas at STP?
3.011 x 10²³
6.022 x 10²³
1.204 x 10²⁴
2.408 x 10²⁴
Related Questions
What are flocs?
Masses of anaerobic bacteria
Masses of aerobic fungi only
Masses of anaerobic bacteria, fungi
Masses of aerobic bacteria associated with fungi filaments
Primary treatment is the
Physical removal of large and small particles from sewage
Biological removal of large and small particles from sewage
Both (1) and (2)
Chemical removal of large and small particles from sewage
BOD may not be a good index for pollution for water bodies receiving effluents from?
Petroleum industry
Sugar industry
Domestic
Dairy industry
A sewage treatment process in which a part of decomposer bacteria present in the wastes is recycled into the starting of the process is called
Cyclic treatment
Activated sludge treatment
Primary treatment
Tertiary treatment
In the sewage treatment bacterial flocs are allowed to sediment in a settling-tank. This sediment is called as
Activated sludge
Primary sludge
Anaerobic sludge
Secondary sludge
A gas occupies 11.2 L at STP. If the pressure is increased to 2 atm while keeping the temperature constant, what is the new volume?
22.4 L
5.6 L
44.8 L
11.2 L
Biochemical Oxygen Demand (BOD) in a river water
Has no relationship with concentration of oxygen in the water
Gives a measure of Salmonella in the water
Increases when sewage gets mixed with river water
Remains unchanged when algal bloom occurs
What is the standard pressure at STP?
1 atm
0.5 atm
2 atm
10 atm
In the sewage treatment bacterial flocs are allowed to sediment in a settling-tank. This sediment is called as
Activated sludge
Primary sludge
Anaerobic sludge
Secondary sludge
BOD of waste water is estimated by measuring the amount of
Total organic matter
Biodegradable organic matter
Oxygen evolution
Oxygen consumption
