Hazards and Estimates of Fossil Fuels

Q.

Why is CNG considered as better fuel than petrol and diesel?

Q.

Explain why, we are advised not to sleep in a room having closed doors and windows, with a coal burning inside.

Q.

What is exhaustible resource?

Q.

Which is the fuel that causes the least pollution

Q. _______ results in the rise in temperature of the earth's atmosphere.

1. Rainfall
2. Aforrestation
3. Global warming
4. Acid rain

Q.

Energy saved is energy produced. Explain.

Q.

Why should we switch off the engine of vehicles while waiting at a traffic light?

Q. Why is the need for conservation of fossil fuels felt more today than a few hundred years ago?

Q. List five ways in which you would act to avert energy crisis .

Q. Question 31
Imagine that all the exhaustible natural resources are exhausted by human activities. Do you think survival of living beings would be possible? If yes, why?If not, why not?

Q.

Give some alternatives for replacing the non-renewable resources. What is the need to replace these resources? [3 MARKS]

Q.

Why is natural gas considered as a clean fuel

Q.

Ram slept in a closed room in which coal was burned. Will Ram be affected by asphyxia?

Q.

Select the fuel that causes less pollution, burns readily and can be used as a fuel in homes and automobiles.

1. Petroleum

2. Paraffin wax

3. Kerosene oil

4. Natural gas

Q. The natural petroleum contains:

1. Compounds of sulphur
2. Hydrocarbons
3. All of these
4. Metals such as iron and arsenic

Q. Imagine that all the exhaustible natural resources are exhausted by human activities. Then comment on the survival of living beings would be easily possible.

Q. Excessive burning of fossil fuels is a major cause of global warming.

1. True
2. False

Q. Electricity generated from fossil fuels such as coal and crude oil to run the industries leads to high concentrations of harmful gases in the atmosphere. This causes ozone layer depletion and global warming. What do coal and oil have in it that releases as oxides into the atmosphere?

1. Sulphur
2. Magnesium
3. Phosphorus
4. Lead

Q.

Which of the following are the properties of the natural gas?

1. It is an eco-friendly fuel compared to conventional fuels.

2. It is highly flammable.

3. It doesn't produce ash.

4. It causes a lot of pollution.

Q.

Which of the following are the properties of the natural gas?

1. It is highly flammable.

2. It doesn't produce ash.

3. It causes a lot of pollution.

4. It is an eco-friendly fuel compared to conventional fuels.

Q. Electricity generated from fossil fuels such as coal and crude oil to run the industries leads to high concentrations of harmful gases in the atmosphere. This causes ozone layer depletion and global warming. What do coal and oil have in it that releases as oxides into the atmosphere?

1. Phosphorus
2. Magnesium
3. Sulphur
4. Lead

Q. Which of the following is compressed to form a gas that is less polluting?

1. LPG
2. Diesel
3. Natural gas
4. Biogas

Q. Fill in the blanks. [3 marks]

1. Fossil fuels are______, ______and___________ . ​
2. Process of separation of different constituents from petroleum is called ______________ . ​
3. Least polluting fuel for vehicle is _____________.

Q. BS norms are used for regulating pollutants from vehicles.

1. True
2. False

Q.

Amit is very consious about pollution. Which fuel he should use for his vehicle?

1. CNG

2. LPG

3. Petrol

4. Diesel

Q. Arrange the following in the decreasing order of greenhouse gas emissions.

1. LNG
2. CNG
3. Coal
4. Diesel
5. Petrol

Q.

What is greenhouse effect ?

Q. Burning of petrochemicals directly causes air pollution by

1. Release of carbon dioxide
2. Release of carbon monoxide
3. Increasing atmospheric temperature
4. Increasing the atmospheric pressure

Q. BS norms are used for regulating pollutants from vehicles.

1. True
2. False

Q. Explain why fossil fuels are exhaustible natural resources. [2 marks]