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 chemistry combustion and flame structure of flame flame combustion

Substance which vaporize during burning gives ____________.

  1. sound

  2. flame

  3. combustion

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

Substances which vaporize during burning gives flame. For example, combustion of kerosene oil produces a flame. On the other hand, certain substances like coal do not vaporize and hence does not produce a flame.

Multiple choice economics environment pollution strategies to control environmental pollution strategies to control pollution strategies to control environmental pollution and green chemistry

Tetraethyl lead (TEL) in petrol was used as antiknocking agent, which creates lead pollution. In order to avoid lead pollution, the substitute of TEL is used in unleaded-petrol. The substitute is denoted as: 

  1. $AK-33-X$
  2. $BK-33-X$
  3. $CK-33-X$
  4. $DK-33-X$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

AK-33-X is a known commercial additive used as an antiknock agent in unleaded petrol to replace the toxic Tetraethyl lead.

Multiple choice economics environment pollution strategies to control environmental pollution strategies to control pollution strategies to control environmental pollution and green chemistry

The fuel obtained by decomposing sludge is:

  1. biogas

  2. petrol

  3. diesel

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

The gas obtained by decomposing sludge is Biogas (methane and carbon dioxide). Decomposition of sludge products methane and carbon dioxide which is then stored and supplied as biogas for various household processes and other commercial processes.

Multiple choice evs a treat for mosquito algae: benefits and harmful effects basics of algae types of microorganisms

Diatomaceous earth is used for all except

  1. polishing

  2. filtration of offs and syrups

  3. making sound and fire proof rooms

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

 The cell walls of diatoms are embedded with silica and thus the walls are indestructible. Thus, diatoms have left behind a large number of cell deposits in their habitat; this accumulation over billions of years is referred to as 'diatomaceous earth'. Being gritty this soil is used in polishing, filtration of oils and syrups.

So the correct option is "biogas production".

Multiple choice chemistry materials around us and different types of houses materials around us matter and its states different states of matter

The combustion of candles, containing paraffin wax, to carbon dioxide and water vapor is:

  1. sublimation as well as chemical reaction with oxygen

  2. only sublimation

  3. not sublimation but a chemical reaction with oxygen

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

The term sublimation refers to a physical change of state and is not used to describe transformation of a solid to a gas in a chemical reaction. The combustion of candles, containing paraffin wax, to carbon dioxide and water vapor is not sublimation but a chemical reaction with oxygen.

Multiple choice carbon tetrachloride ddt preparation of haloalkanes halogen derivatives
Carbon tetrachloride is inflammable.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Carbon tetrachloride $\displaystyle (CCl _4)$ is not inflammable.
Hence, the given statement is false.

Note:
Carbon tetrachloride $\displaystyle (CCl _4)$ is poisionous and water insoluble. It is soluble in ethanol and ether.

Multiple choice carbon tetrachloride ddt preparation of haloalkanes halogen derivatives

The fire extinguisher 'Pyrene' contains:

  1. carbon dioxide

  2. carbon disulphide

  3. carbon tetrachloride

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

Carbon tertrachloride is commonly used liquid in fire extinguishers to control fire. When heated to decomposition, it emits fumes of toxic phosgene and of hydrogen chloride. 

Multiple choice chemistry environmental chemistry biochemistry and the environment green chemistry strategies to control environmental pollution and green chemistry

Biomass is used instead of extensive use of petroleum. This is an application of :

  1. Green revolution

  2. waste management

  3. Green chemistry

  4. revolution resource recovery
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Use of petroleum creates lots of gases which are harmful to the environment. 


In order to decrease human consumption of petroleum, chemists have investigated methods for producing polymers from renewable resources such as biomass. 

NatureWorks polylactic acid (PLA) is a polymer of naturally occurring lactic acid (LA), which on consumption creates no waste and hence, is an environment-friendly compound.

It is an application of Green chemistry.

Hence the correct option is C.

Multiple choice chemistry environmental chemistry biochemistry and the environment green chemistry strategies to control environmental pollution and green chemistry

_______ is an environment-friendly product and better than halons which are used to extinguish fire.

  1. Ibuprofen

  2. Pyrocool

  3. Carcinogen

  4. Carbon-dioxide
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pyrocool is a product which is environmentally benign foam discovered using concept of Green chemistry. Large-scale fires such as oil tankers and jet airplane can be extinguished in a short time and in a better way than previous use of the halons.

Multiple choice chemistry environmental chemistry biochemistry and the environment green chemistry strategies to control environmental pollution and green chemistry

paraffin wax contains alkanes ranging from

  1. ${ C } _{ 3 }$ to ${ C } _{ 9 }$
  2. ${ C } _{ 10 }$ to ${ C } _{ 15 } $
  3. ${ C } _{ 16 }$ to ${ C } _{ 20 }$
  4. ${ C } _{ 21 }$ to ${ C } _{ 30 }$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Paraffin wax is a mixture of solid alkanes. It typically consists of long-chain hydrocarbons ranging from C21 to C30.