Inorganic Impurities

Q.

How can you help in reducing the problem of waste disposal? Give any two methods.

Q.

We should avoid using plastic bags.Give reason.

Q.

Which of the following is biodegradable?

1. (a) DDT

2. (b) Cow dung

3. (c) Polythene

4. (d) Plastic

Q. Non-biodegradable materials:

1. Cannot be burnt
2. Undergoes decomposition
3. Cannot be degraded by bacteria
4. Cannot be made from artificial methods

Q.

A mixture (x) in water contains suspended solids, organic impurities, inorganic impurities (a), nutrients (b), disease-causing bacteria, and other microbes. Give names for (x), (a) and (b)?

Q.

Are there diatoms In drinking water?

Q. A mixture (x) in water contains suspended solids, organic impurities, inorganic impurities (a), nutrients (b), disease causing bacteria and other microbes. Give names for (x), (a) and (b)?

Q.

Which of the following is a part of the inorganic impurities of the sewage?

1. Excreta
2. Garbage
3. Phosphate

4. Vegetable waste

Q.

Explain why it is harmful to discharge untreated sewage into rivers and seas.

Q. Why are the eucalyptus trees grow near or along the sewage ?

Q.

Question 3

Sewage also contains some nutrients and bacteria. Comment.

Q.

Which of the following is a part of inorganic impurity in sewage?

1. Urea

2. Phosphates

3. Vegetable waste

4. Faeces

Q. Which property of plastics makes them so useful but also makes them an environmental hazard?

Q.

Why do you think nurdles are extremely dangerous when present in wastewater?

1. Nurdles act as microbes in our body

2. Nurdles are very small in size

3. Nurdles can block streams and rivers

4. Nurdles are non-biodegradable

Q. Which of the following is a part of inorganic impurity in sewage?

1. Faeces
2. Vegetable waste
3. Phosphates
4. Urea

Q.

Question 23

What are the different types of inorganic and organic impurities generally present in sewage?

Q.

Which of the following is a part of inorganic impurity in sewage?

1. Urea

2. Phosphates

3. Vegetable waste

4. Faeces

Q.

Which of the following is not a biodegradable waste?

1. Plastic can

2. Tea leaves

3. Clothes

4. vegetable peels

Q. Plastics are non-biodegradable in nature.

1. \N
2. \N

Q.

Which of the following is a part of the inorganic impurities of the sewage?

1. Excreta
2. Garbage
3. Phosphate

4. Vegetable waste

Q. Statement I:- Plastics burn in presence of air to produce toxic substances.

Statement II:- Plastics can be used to produce electricity when burnt in the absence of air.

1. Statement I is true and II is false
2. Statement I and II are true
3. Statement I is false and II is true
4. Statement I and II are false

Q. Sewage does not contain any inorganic impurities.

1. False
2. True

Q.

Differentiate between the following:

Domestic waste and commercial waste

Q.

Domestic waste is comprised of many components. List these components of domestic waste.

Q. Non-biodegradable materials:

1. Cannot be burnt
2. Cannot be made from artificial methods
3. Cannot be degraded by bacteria
4. Undergoes decomposition

Q.

Which of the following is a part of inorganic impurity in sewage?

1. Faeces

2. Vegetable waste

3. Urea

4. Phosphates

Q.

Which of the following is a property of most plastics such as PET and Teflon?

1. Non- Biodegradable

2. Biodegradable

3. Non - combustible

4. Edible