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Class 8 Practice – Level 3 – Set 1 – Coal and Petroleum
Total questions: 15
1.
Which of the following factors is most responsible for the formation of fossil fuels over millions of years?
Temperature fluctuations in the Earth's core
Intense heat and pressure acting on dead plant and animal matter
Erosion of rock layers containing organic matter
The oxygen content in deep ocean waters
None
2.
In the fractional distillation of petroleum, which component is collected at the bottom of the distillation column?
Petrol
Kerosene
Diesel
Bitumen
None
3.
Which of the following statements about anthracite coal is true?
It has the lowest carbon content and highest moisture content
It produces the least amount of heat energy
It is the cleanest burning type of coal with a high carbon content
It is used primarily for domestic heating purposes
None
4.
Why is natural gas considered a better fuel for power generation compared to coal?
It is easier to extract
It produces more greenhouse gases
It burns more efficiently and produces fewer pollutants
It is a renewable resource
None
5.
What role does sulfur play in the environmental impact of burning fossil fuels?
Sulfur combines with oxygen to form carbon dioxide
Sulfur is released as sulfur dioxide, contributing to acid rain
Sulfur helps to reduce air pollution
Sulfur increases the energy efficiency of fuels
None
6.
Which byproduct of coal processing is used to make synthetic dyes and explosives?
Coal tar
Coke
Anthracite
Bitumen
None
7.
How does hydraulic fracturing (fracking) differ from conventional drilling in natural gas extraction?
Fracking uses higher temperatures to extract gas
Fracking involves injecting water, sand, and chemicals to fracture rock and release gas
Fracking is only used to extract oil, not gas
Fracking is less harmful to the environment than conventional drilling
None
8.
Which fossil fuel is commonly referred to as "buried sunshine"?
Coal
Petroleum
Natural gas
Peat
None
9.
Which chemical reaction takes place during the combustion of coal that contributes to the greenhouse effect?
Carbon combines with hydrogen to form methane
Sulfur combines with oxygen to form sulfur dioxide
Carbon combines with oxygen to form carbon dioxide
Nitrogen combines with oxygen to form nitrogen oxides
None
10.
What is the main reason for using catalytic converters in vehicles?
To reduce the emission of harmful gases like nitrogen oxides and carbon monoxide
To increase fuel efficiency
To improve engine performance
To convert petroleum into other useful products
None
11.
Which type of coal mining is more harmful to the environment?
Underground mining
Surface mining
Hydraulic mining
Drift mining
None
12.
Why is petroleum often called “black gold”?
It is used to produce valuable materials like plastics and fuels
It has a high monetary value due to global demand
It is black in color and extremely valuable
All of the above
None
13.
What is the significance of fractional distillation in the petroleum industry?
It is used to purify petroleum
It separates crude oil into different useful fractions based on boiling points
It converts crude oil into natural gas
It mixes petroleum with water to improve its quality
None
14.
The energy stored in fossil fuels is originally derived from:
Geothermal heat
Tidal energy
Solar energy
Wind energy
None
15.
Which of the following is an example of carbon sequestration?
Capturing carbon dioxide emissions from power plants and storing them underground
Increasing the efficiency of coal-fired power plants
Using more renewable energy sources
Burning natural gas instead of coal
None
1 out of 15
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