Effects of Water Pollution on the River Ganga

Q.

What is eutrophication? What are it's side effects?

Q. Which of the following was launched in 1985 to clean the Ganga river?

1. Ganga Seva Samiti
2. Ganga Andolan
3. Ganga Action Plan
4. Ganga Cleanliness Drive

Q. The biological oxygen demand with increase in number of aquatic organisms.

1. remains same
2. increases
3. decreases

Q. The excessive use of fertilisers increases the nutrient content of soil. If these nutrients find their way to a nearby lake, then it would result in the

1. Immediate death of aquatic life

2. Increase in fish population

3. Increase in the growth of aquatic vegetation

4. Increase in the amount of dissolved oxygen in water.

Q.

Give reason: A sudden change in the temperature of water body is dangerous for aquatic life.

Q. What does the presence of a green layer over a water body in the image depict?

1. Bioaccumulation
2. Eutrophication
3. Biomagnification
4. Silting

Q.

Name the stages of the life cycle of aquatic animals which are affected by change in temperature.

Q.

A lake with an inflow of domestic sewage-rich in organic waste may result in

1. drying of the lake very soon due to algal bloom

2. an increased production of fish due to lot of nutrients

3. oxides of nitrogen

4. death of fish due to lack of oxygen

Q.

Prolonged _____ leads to the overgrowth of floating plants in the aquatic ecosystem.

Q.

Which of these is a definite source of water pollution?

1. Irrigation water

2. Vehicles

3. Rain

4. Factories

Q.

I am a microbe which lives in polluted water. During the rainy season I make many people fall ill. I cause a disease known as typhoid. Who am I?

1. Salmonella typhi

2. Bacillus subtilis

3. Penicillium notatum

4. Escherichia coli

Q. Which of the following was launched in 1985 to clean the Ganga river?

1. Ganga Seva Samiti
2. Ganga Andolan
3. Ganga Cleanliness Drive
4. Ganga Action Plan

Q. The excessive use of fertilisers increases the nutrient content of soil. If these nutrients find their way to a nearby lake, then it would result in the