Tag: petroleum and natural gas

Questions Related to petroleum and natural gas

The final product in the following reaction can be used as, $4CH _3-CH _2-Cl+4Na+Pb \rightarrow$

chemistry petrochemicals and polymers petroleum properties of alkanes petroleum and natural gas rocks and minerals

  1. anaesthatic

  2. narcotics

  3. analgesic

  4. antiknocking agent

Show answer
Correct Option: D
Explanation:

  • The final product of this reaction is $(CH _3CH _2) _4Pb$ [tetraethyl lead (TEL)].
$4CH _3-CH _2-Cl + 4Na + Pb \rightarrow (CH _3CH _2) _4Pb$
It is also used as an antiknocking agent in fuels for automobiles.

List I List II
A Kerosene I Metalling of roads
B Diesel II Jet aircraft fuel
C Paraffin Wax III Generation of electricty
D Bitumen IV Lubricants
chemistry rocks and minerals petroleum and natural gas fossil fuels coal and petroleum

  1. (A)-I, (B)-II, (C)-III, (D)-IV

  2. (A)-I, (B)-III, (C)-IV, (D)-II

  3. (A)-II, (B)-III, (C)-IV, (D)-I

  4. (A)-IV, (B)-II, (C)-III, (D)-I4

Show answer
Correct Option: C
Explanation:

Kerosene is used in jet aircraft as fuel.


Diesel is used in generation of electricity.

Paraffin wax is used as lubricant.

Bitumen is used for metalling of roads.

Option C is correct.

What happens during carbonisation?

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. Conversion of organic substance to carbon

  2. Conversion to carbon dioxide

  3. Conversion of carbon to diamond

  4. Conversion of carbon to water

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Correct Option: A
Explanation:

During carbonisation an organic substance converts into carbon or a carbon-containing residue through pyrolysis or destructive distillation. 

Which of the following cannot undergo carbonization?

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. Wood

  2. Dead vegetaion

  3. Minerals

  4. Both A and B

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Correct Option: C
Explanation:

Substances which contain organic matter can undergo carbonization. Minerals do not contain any organic matter and cannot undergo carbonization.

Liquid hydrocarbons can be converted to a mixture of gaseous hydrocarbons by:

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. oxidation

  2. cracking

  3. distillation under reduced pressure

  4. hydrolysis

Show answer
Correct Option: B
Explanation:

The process of breaking higher hydrocarbons with high boiling points into a variety of lower hydrocarbons that are more volatile (low boiling), is called cracking (or pyrolysis). For example, a higher hydrocarbon $C _{10}H _{22}$ splits according to the reaction.

$C _{10}H _{22}  \xrightarrow {heat \ 770K} C _8H _{18} + C _2H _4$
The process of cracking or pyrolysis increases the relative amounts of the lower hydrocarbons, which exists in a gaseous state, while higher hydrocarbons exist in the liquid or solid state.

Process of conversion of wood into coal by biochemical process, taking over millions of years is called :

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. Catenation

  2. Carbonation

  3. Pyrolysis

  4. Destructive distillation

Show answer
Correct Option: B
Explanation:

Process of conversion of wood into coal by biochemical process over a millions of years is called carbonation.This process occurs in the deep level of earth.

Hence option B is correct.

Cracking is a process in which :

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. Petrol is produced by cracks on the surface of wax.

  2. Combustion of petrol is carried out.

  3. Compounds of high molecular mass are converted into compounds of lower molecular mass

  4. None of the statements is correct

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Correct Option: C

For grading diesel oil the term octane number is used.  

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. True

  2. False

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Correct Option: B

Straight chain hydrocarbons have high octane number values than branched-chain hydrocarbons. 

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. True

  2. False

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Correct Option: B

Octane number can be changed by :

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. alkylation

  2. cyclisation

  3. isomerisation

  4. All of these

Show answer
Correct Option: D
Explanation:

All the three reactions, i.e. alkylation, cyclisation, and isomerisation convert straight-chain hydrocarbons to branched-chain or cyclic compounds, which changes the percentage of straight-chain hydrocarbon. 


Hence, the octane number is changed.

So, the correct option is D.