Chemistry ยท 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

Multiple choice general knowledge

You can start a fire if you have alcohol, petrol, kerosene, paper, candle, coke, a full matchbox and a piece of cotton wool. What is the first thing you light?

  1. Paper

  2. Matches

  3. Candle

  4. Who wants fire? Take alcohol with Coke and sleep ;)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The answer is Matches because you must light the match first before you can light anything else. This appears to be asking which material burns best, but it's actually testing logical sequence - you need an ignition source to start a fire, and that ignition source (the match) must be lit first.

Multiple choice general knowledge

What has BP discovered in the Gulf of Mexico?

  1. A giant new oil field

  2. A giant new gas field

  3. A way to turn human waste into diesel

  4. A way to recycle exhaust fumes into clean air
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

BP has discovered multiple giant oil fields in the Gulf of Mexico, including Thunder Horse (one of the largest in the Gulf), Atlantis, Mad Dog, and others. These are significant deepwater oil discoveries, not gas fields or environmental technologies.

Multiple choice general knowledge science & technology

Coal is formed due to the process of

  1. Evaporation

  2. Centrifugation

  3. Carbonization

  4. Conjugation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Carbonization is correct. Coal is formed from plant matter through the process of carbonization over millions of years under heat and pressure. Evaporation is a liquid-to-gas process, centrifugation separates mixtures by density, and conjugation is a chemical or grammatical process unrelated to coal formation.

Multiple choice general knowledge

OIL : ENERGY :: library : _____

  1. Information

  2. books

  3. sun

  4. gasoline
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Oil provides energy - it's the resource/function relationship. Similarly, a library provides information. Books are physical objects in a library, not what it 'provides' in the abstract sense.

Multiple choice general knowledge science & technology

Simplest alkane is

  1. Methane

  2. Ethane

  3. Propane

  4. Butane

  5. Pentane
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Methane (CH4) is the simplest alkane, having just one carbon atom bonded to four hydrogen atoms. Alkanes are saturated hydrocarbons with only single bonds, and methane has the minimum possible structure, making option A correct.

Multiple choice general knowledge science & technology

The internal combustion engine is an engine in which the combustion of a fuel occurs with an oxidizer (usually air) in -----.

  1. combustion chamber

  2. on piston

  3. outside engine

  4. inside oil chamber
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Internal combustion engines burn fuel inside a combustion chamber within the engine, unlike external combustion engines (like steam engines) where combustion occurs outside. The combustion chamber is where the fuel-air mixture ignites and expands.

Multiple choice general knowledge science & technology

Correct sequence of combustion of fuel is as:

  1. intake,power stroke,compression and exhaust

  2. intake,compression, exhaust and power stroke

  3. intake,compression,power stroke,exhaust

  4. power stroke,exhaust intake and compression
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The four-stroke cycle sequence is: 1) Intake (fuel-air mixture enters), 2) Compression (mixture is compressed), 3) Power stroke (combustion and expansion), 4) Exhaust (gases expelled). This is the standard Otto cycle used in most gasoline engines.

Multiple choice general knowledge science & technology

All internal combustion engines depend on the----- chemical process of combustion:

  1. endothermic

  2. exothermic

  3. isothermic

  4. isobaric
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Combustion is an exothermic chemical process - it releases heat energy. In internal combustion engines, this released energy creates pressure that drives pistons. Endothermic processes absorb heat, isothermic processes maintain constant temperature, and isobaric processes maintain constant pressure.

Multiple choice general knowledge science & technology

Four stroke -petrol engine uses which cycle for its operation?

  1. Diesel cycle

  2. Rankine cycle

  3. Otto cycle

  4. Carnot cycle
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A four-stroke petrol engine operates on the Otto cycle, which consists of intake, compression, combustion (at constant volume), and exhaust strokes. The Diesel cycle differs by using constant pressure combustion, while the Rankine cycle applies to steam plants and the Carnot cycle is theoretical.

Multiple choice general knowledge science & technology

Four stroke diesel engine uses which cycle for its operation

  1. petrol cycle

  2. diesel cycle

  3. Castor cycle

  4. jatropha cycle
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A four-stroke diesel engine operates on the Diesel cycle, which is characterized by constant pressure combustion (heat addition at constant pressure). Unlike the Otto cycle used in petrol engines, diesel engines compress air alone and then inject fuel which ignites spontaneously. Castor and jatropha cycles are not valid thermodynamic cycles.