The minimum dissolved oxygen which should always be present in water in order to save the aquatic life is?

1 ppm
4 ppm
10 ppm
40 ppm

LohaHridoy

5 views

2025-01-04 04:42

1 Answers

AhmedNazir

Answer: Option 2

Let'

5 views Answered 2022-09-01 13:21

Related Questions

When a nutrient like fertilizer is present in large quantities in a water bodies, plants grow and decay in large numbers because of suffocation of pond that does not leave enough oxygen needed to support life. This type of pollution is called?

1 Answers 5 Views

Directions : Following question consists of a statement followed by four arguments I, II, III and IV. You have to decide which of the arguments is a STRONG arguments and which is a WEAK Argument. Statement : Should the rule of wearing helmet for both driver and pillion rider while driving a motor bike be enforced strictly Arguments : I. Yes. It is a rule and rules should be followed strictly by all. II. No. Each individual knows how to protect his own life and it should be left to his discretion. III. No. It does not ensure safety as only the head is protected and rest of the body is not. IV. Yes. It is a necessity as head, being the most sensitive organ, is protected by the helmet.?

1 Answers 5 Views

Directions : In each of the following questions a statement is given, followed by three conclusions. Give answer : Statement : Quality of life of a person is not dependent only on his wealth. Assumptions : I. The aim of most people is just to acquire more wealth. II. There are some factors other than wealth which contribute to the quality of life. III. Wealth does not contribute to the quality of life at all.?

1 Answers 9 Views

Directions : Following question consists of a statement followed by four arguments I, II, III and IV. You have to decide which of the arguments is a STRONG arguments and which is a WEAK Argument. Statement : Should all those who are convicted for heinous crimes like murder or rape, beyond all reasonable doubts be given capital punishment or death penalty Arguments : I. No. The death penalty should be given only in very rare and exceptional cases. II. Yes. This is the only way to punish such people who take others' lives or indulge in inhuman activities. III. Yes. Such severe punishments only will make people refrain from such heinous acts and the society will be safer. IV. No. Those who are repentant for the crime they committed should be given a chance to improve and lead a normal life.?

1 Answers 4 Views

Directions : Following question consists of a statement followed by three arguments I, II and III . You have to decide which of the arguments is a STRONG arguments and which is a WEAK Argument. Statement : Should mercy death be legalized, i.e., all those who are suffering from terminal diseases be allowed to end their lives if they so desire Arguments : I. No. Nobody should be allowed to end his/her life at his/her will as this goes against the basic tenets of humanity. II. Yes. Patients undergoing terrible suffering and having absolutely no chance of recovery should be liberated from suffering through mercy death. III. No. Even mercy death is a sort of killing and killing can never be legalized.?

1 Answers 5 Views

Statement : The weather bureau has through a recent bulletin forecast heavy rainfall during the next week which may cause water logging in several parts of the city. Courses of Action : I. The bulletin should be given wide publicity through the mass media. II. The civic authority should keep in readiness the pumping system for removal of water from these parts. III. The people should be advised to stay indoors during the period.?

1 Answers 5 Views

Statement : The meteorological department has issued a notification forecasting less rainfall during next year's monsoon. Courses of Action : I. The government should immediately set up a water authority for proper management of water resources. II. The water supply authorities should be asked to implement reduction in regular water supply to tackle the situation. III. The farmers should be advised to cultivate alternate crops which require less water during the coming months.?

1 Answers 9 Views

Which of the following aquatic plant is effective in preventing the water-pollution caused by industrial waste?

1 Answers 5 Views

Statement : Residents from Model Colony coming under North Ward of City X have complained to the Ward Officer that for last three days the tap water in the ward is contaminated and no action is being initiated by municipal staff. Courses of Action : I. The Ward Officer of North Ward should initiate action against residents who have lodged complaints against municipal staff. II. The Ward Officer should ask his junior officer to visit Model Colony to assess the actual condition of water with his staff and to get samples of water tested from laboratories. III. The Ward Officer should ask Ward Engineer to check water installations and pipelines in the Model Colony area.?

1 Answers 6 Views

The relative stability of a sewage sample, whose dissolved oxygen is same as the total oxygen required to satisfy BOD, is?

1 Answers 6 Views

এক্সাম দিয়ে মেধা যাচাই করুন

Job Preparation (1125)

Admission (754)

এসএসসি (10)

এইচএসসি (5)