Smog, Classical Smog

Q.

What is smog? How is classical smog different from photochemical smog?

Q. Photochemical smog is _____ in characer while classical smog is _____ in character.

1. oxidising, reducing
2. reducing, oxidising
3. oxidising, oxidising
4. reducing, reducing

Q.

What is smog? How is classical smog different from photochemical smog?

Q.

How do humans affect photosynthesis?

Q.

A river with a high BOD value is

1. Highly clean

2. Highly polluted

3. Highly productive

4. None of these

Q. Which of the following statements is not true about classical smog?

1. Produced in cold and humid climate
2. It contains compounds of reducing nature
3. It contains smoke, fog and sulphur dioxide
4. Its main components are produced by the action by the action of sunlight on emissions of automobiles and factories

Q.

Cataract blinds at least 120 million people globally every year. What is its main cause?

1. Gasoline fumes

2. Heredity

3. Ultraviolet radiations

4. Unbalanced diet

Q. The statement that is not true about ozone is:

1. It is a toxic gas and its reaction with $NO$ gives $N{O}_2$
2. In the stratosphere, $CFCs$ release chlorine free radicals $\left(Cl\right)$ which reacts with $O_3$ to give chlorine dioxide radicals.
3. In the atmosphere, it is depleted by $CFCs$.
4. In the stratosphere, it forms a protective shield against $UV$ radiation.

Q.

What are particulatex? Which aromatic compound Ian present in the air as particulatex?

Q. Biochemical Oxygen Demand (BOD) measures organic material present in water. A sample of water has a BOD value of less than 5 ppm. This indicates that:

1. Water is rich in dissolved oxygen
2. Water is highly polluted
3. Water is poor in dissolved oxygen
4. Water is not suitable for aquatic life

Q. A mixture of various gases with dust and water vapour is known as:

1. smoke
2. smog
3. dust
4. fog

Q. Which of the following is an example of photochemical smog?

1. Aldehydes
2. Ester
3. None of the above
4. Ketones

Q. The basic component of the smog is:

1. PAN
2. PBN
3. $N{O}_2$
4. All of the above

Q.

Which of the following are common components of a photochemical smog?

1. PAN

2. Acrolein

3. Nitric oxide

4. All of the above

Q. Ozone is an air pollutant that is a major component of:

1. Photochemical smog
2. Smoke
3. Dust
4. Fog

Q. Smog is a combination of :

1. smoke and fog
2. water and smoke
3. fire and water
4. air and water

Q.

What do you mean by Biochemical Oxygen Demand (BOD)?

Q. Which of the following processes is not responsible for adding particulates to the atmosphere?

1. Photosynthesis
2. Industrial processes
3. Agricultural processes
4. Combustion of fuels

Q. Low visibility in cold weather is due to:

1. formation of fossil fuel
2. unburnt carbon particles or hydrocarbons suspended in air
3. lack of adequate power supply
4. none of these

Q. Smog is a combination of:

1. Smoke and fog
2. Smoke and light
3. Fog and light
4. All are correct

Q.

The smog is essentially caused by the presence of

1. $O_{2}and{N}_2$

2. Oxides of sulphur and nitrogen

3. $O_{3}and{N}_2$

4. $O_{2}and{O}_3$

Q. The atmospheric pollutants or gases that form smog are released in the air ________.

1. when wool is burnt
2. when some thing burnt
3. when fuels are burnt.
4. none of these

Q. Assertion (A): Classical smog occurs in cold humid climate and it is acidic as well as reducing in nature.
Reason (R): It is a mixture of smoke, fog and sulphur dioxide.

1. Both A and R are correct and R is the correct explanation of A.
2. Both A and R are correct but R is not the correct explanation of A.
3. A is correct but R are not correct.
4. A is not correct but R is correct.

Q. Photochemical smog is _____ in character while classical smog is _____ in character.

Q. Water filled in two glasses A and B have BOD values of 10 and 20 respectively. The correct statement regarding them is :

1. A is suitable for drinking, whereas B is not
2. A is more polluted than B
3. B is more polluted than A
4. Both A and B are suitable for drinking

Q. Classical smog is also called:

1. oxidising smog
2. reducing smog
3. summer smog
4. photochemical smog

Q. Photochemical smog is also called as____________.

1. London Smog
2. sulphurous acid smog
3. Both $A$ and $B$
4. Los angles smog

Q. Smog causes :

1. All of the above
2. pulmonary disease
3. eye irritation
4. pneumonia

Q. Classical smog is also called as________.

1. London smog
2. sulphurous acid smog
3. Both $A$ and $B$
4. Los angles smog

Q. What is smog?