Chemistry · General Awareness
Carbon and Fossil Fuels
1,898 Questions
Review fundamental concepts regarding carbon compounds, coal distillation, and fossil fuel formation. This segment covers the chemical properties and industrial applications of natural gas and crude oil. Practicing these questions will strengthen your chemistry foundation for general science sections.
Coal distillationPetroleum formationProperties of crude oilNatural gas applications
Carbon and Fossil Fuels Questions
A
Correct answer
Explanation
A candle flame has three distinct zones: (1) Inner dark zone - incomplete combustion due to insufficient oxygen, (2) Middle luminous zone - moderate combustion with yellow glow, and (3) Outer non-luminous zone - complete combustion with blue flame. This three-zone structure is characteristic of hydrocarbon flames.
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Petrol in diesel
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Oil in water
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Iron and sulphur
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Sand in water
A
Correct answer
Explanation
Petrol in diesel is a homogeneous mixture.
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Sand and gravel
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Gravel and charcoal
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Sand, gravel and charcoal
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Charcoal and sand
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Only charcoal
C
Correct answer
Explanation
Layers of sand, gravel and charcoal are present in the filtration chamber.
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sooty flame
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blue flame
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bluish-green flame
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yellow flame
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black flame
B
Correct answer
Explanation
Saturated hydrocarbons generally give a clean blue flame because complete combustion of these substances takes place.
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petrol
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diesel
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coal
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None of these
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all of these
D
Correct answer
Explanation
Petrol, diesel, coal and kerosene emit nitrogen dioxide during combustion.
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Peat
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Lignite
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Haematite
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Anthracite
C
Correct answer
Explanation
Haematite, also spelled as hematite, is the mineral form of iron(III) oxide (Fe2O3).
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Peat
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Bituminous
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Lignite
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Graphite
D
Correct answer
Explanation
Peat, bituminous, and lignite are all types of coal - sedimentary rocks formed from compressed plant matter. Graphite, however, is a mineral (a form of carbon) formed through metamorphic processes, not from the coal formation pathway. It has a completely different origin and crystal structure.
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Iran-Iraq war
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strained relations between Israel and Middle East countries
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highly increased cost of petroleum
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increase in the consumption of petroleum
D
Correct answer
Explanation
The present day search for fuels alternative to petroleum is mainly due to increase in the consumption of petroleum.
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Leakage of oil during transit
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Loss due to faulty packaging
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Loss due to theft
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Loss due to fire
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Loss due to negligence
A
Correct answer
Explanation
Normal loss is that which cannot be avoided inspite of best efforts. The leakage may be taken as normal loss.
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It is a good absorbent.
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It is black in colour.
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It is porous.
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None of these
A
Correct answer
Explanation
Correct Answer: It is a good absorbent.
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distillation
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evaporation
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condensation
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sublimation
D
Correct answer
Explanation
Sublimation is the transition of a substance from the solid phase to the gas phase without passing through an intermediate liquid phase.
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Obtaining coke
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Obtaining coal tar
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Fuelling thermal power plants
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Fuelling automobiles
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Generating coal gas
D
Correct answer
Explanation
Automobiles do not use coal as fuel.
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coal tar
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LPG
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petroleum
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paraffin wax
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lubricating oil
A
Correct answer
Explanation
Naphthalene balls are obtained from coal tar.
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Aviation fuel
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Coal gas
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LPG
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Gobar gas
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CNG
B
Correct answer
Explanation
Coal gas is obtained from coal.
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Rocks
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Coke
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Wax
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Plastics
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Bitumen
E
Correct answer
Explanation
Bitumen is used to lay roads.