Chemistry · General Awareness

Carbon and Fossil Fuels

1,756 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 evs substances in daily use can all changes be reversed? substances and objects changes around us

Coal is _________ fuel.

  1. fossil

  2. natural

  3. Both a and b

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Coal is a fossil fuel. Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure. 

Multiple choice evs substances in daily use can all changes be reversed? substances and objects changes around us

Petroleum products are used for :

  1. fuel purpose

  2. making creams and ointments
  3. both $A$ and $B$

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Petroleum products such as petrol, diesel, kerosene and petroleum gas are used as fuel as they have high calorific value. 


Petroleum products are also used as raw material for cosmetics industries.

Hence the option C is correct.

Multiple choice history a road to history taj mahal: a case study air and water pollution control air and water pollution

The Supreme Court ordered:

  1. industries to switch to cleaner fuels like CNG (Compressed Natural Gas) and LPG (Liquefied Petroleum Gas)

  2. the automobiles should switch over to unleaded petrol in the Taj zone

  3. both A and B

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The Supreme Court ordered industries to switch to cleaner fuels like CNG (Compressed Natural Gas) and LPG (Liquefied Petroleum Gas). Moreover, the automobiles should switch over to unleaded petrol in the Taj zone.

Multiple choice transgenic organisms biotechnology and its applications biotechnology and its application biology

Which one of the following sets of plant show/have shown promise as potential hydrocarbon(petroleum) sources?

  1. Simmondsia chinensis, Euphorhia ahvssinica, E. Teracalli

  2. Hardwockia pinnate, Capaifera longsorfii, Euphorbia esinifera

  3. Capaifera multijuga, Euphrobia lathyrus, caloropis procera

  4. Sesamum indicum, Linum usitatissimum, Arachis hypogea
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Simmondsia chinensis (jojoba), Euphorbia abyssinica, and Euphorbia terracalla have shown promise as potential hydrocarbon or petroleum-like sources. Jojoba produces liquid wax esters similar to sperm whale oil, while certain Euphorbia species produce latex containing hydrocarbon-like compounds. Options B and C contain misspelled or incorrect plant names. Option D lists conventional oilseed plants (sesame, linseed/flax, peanut) that produce edible oils, not petroleum-like hydrocarbons.

Multiple choice chemistry occurrence of carbon compounds in nature importance of carbon covalent bonding in carbon compounds carbon and its forms

Using the given hints, identify the option with correct coal product and its use.
(1)$\;\;$Almost pure form of carbon.

  1. Coke, manufacture of steel

  2. Coal tar, manufacture of paints

  3. Coke, manufacture of plastics

  4. Coal tar, extraction of metals
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Coke has few impurities and high carbon content. Coke is used as a fuel and as reducing agent in smelting iron ore in blast furnace for production of steel. The bulk specific gravity of coke is around 0.77 and is highly porous.

Multiple choice chemistry chemical reactions of organic compounds combustion and thermal cracking of hydrocarbons chemical properties of carbon compounds chemical properties of organic compounds

When most fuels burn, the products include carbon dioxide and X. What is X?

  1. Hydrocarbons

  2. Hydrogen

  3. Water

  4. Hydroxide

  5. Hydrogen peroxide
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When most fuels burn, the products include carbon dioxide and water.
Fuels are hydrocarbons. Combustion of hydrocarbons releases carbon dioxide and water.
$\displaystyle  CH _4 + 2O _2 \rightarrow CO _2 + 2H _2O$

Multiple choice chemistry chemical reactions of organic compounds combustion and thermal cracking of hydrocarbons chemical properties of carbon compounds chemical properties of organic compounds

Petrol engine gives off gaseous oxides of :

  1. sulphur

  2. phosphorus

  3. carbon

  4. nitrogen
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Petrol engine gives off gaseous oxides of nitrogen.
During combustion of fuel at high temperature, nitrogen and oxygen of air combine to form $NO$ and $\displaystyle NO _2$ and are released with the exhaust gas.

Multiple choice chemistry chemical reactions of organic compounds combustion and thermal cracking of hydrocarbons chemical properties of carbon compounds chemical properties of organic compounds

Use of petrol and diseal as fuel in automobiles are now replaced by :

  1. LPG

  2. CNG

  3. butimen

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

Use of petrol and diseal as fuel in automobiles are now replaced by CNG.
CNG is compressed natural gas (methane stored at high pressure).
Combustion of CNG results in fewer unwanted gases than petrol and diseal.
Also CNG is safer than petrol and diseal as CNG is lighter than air and disperses quickly when released.

Multiple choice chemistry chemical reactions of organic compounds combustion and thermal cracking of hydrocarbons chemical properties of carbon compounds chemical properties of organic compounds

Complete combustion of alkene require sufficient :

  1. oxygen

  2. hydrogen

  3. nitrogen

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

Complete combustion of alkene require sufficient oxygen.
Alkene on combustion in presence of sufficient oxygen will give carbon dioxide and water.
$\displaystyle CH _2=CH _2 + 3O _2 \rightarrow 2CO _2 + 2H _2O$

Multiple choice chemistry chemical reactions of organic compounds combustion and thermal cracking of hydrocarbons chemical properties of carbon compounds chemical properties of organic compounds

Alkanes are used as fuel :

  1. because there is evolution of large amount of heat during combustion

  2. because there is evolution of large amount of heat during conduction

  3. because there is evolution of large amount of heat during neutralization

  4. because there is absorption of large amount of heat during combustion
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Alkanes are used as fuel, because there is evolution of large amount of heat during combustion. Here, the purpose is to obtain as much heat as possible from given mass of fuel.

Multiple choice chemistry chemical reactions of organic compounds combustion and thermal cracking of hydrocarbons chemical properties of carbon compounds chemical properties of organic compounds

LPG burns more cleanly than higher molecular weight hydrocarbon :

  1. because it releases volatile pollutants

  2. because it releases less pollutants

  3. because it releases pollutants which are toxic

  4. because it releases more pollutants
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

LPG burns more cleanly than higher molecular weight hydrocarbon because it releases less pollutants.  Being a gas, LPG does not cause ground or water pollution hazards, but it  causes air pollution.
Note: LPG is liquefied petroleum gas which is compound of butane and propane used in cooking fuel ( in heating appliances, cooking equipment) , motor fuel (in vehicles) and refrigeration.

Multiple choice chemistry chemical reactions of organic compounds combustion and thermal cracking of hydrocarbons chemical properties of carbon compounds chemical properties of organic compounds

Benzene when heated in air burns with ________ and produces $CO _2$ and $H _2O$.

  1. sooty flame

  2. non-sooty flame

  3. light color flame

  4. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Benzene when heated in air burns with sooty flame and produces $\displaystyle CO _2 $ and $\displaystyle H _2O$.
$\displaystyle C _6H _6 + \dfrac {15}{2} O _2 \rightarrow 6CO _2 + 3H _2O$
Note: Incomplete combustion of unsaturated hydrocarbons give sooty flame due to presence of black unburnt carbon particles.