Tag: rocks and minerals

Questions Related to rocks and minerals

The temperature range of kerosene obtained from petrol is ___________.

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. between $400^0C to 500^0C$.

  2. between  $300^0C to 500^0C$.

  3. between  $300^0C to 200^0C$.

  4. between   $100^0C to 200^0C$.

Show answer
Correct Option: C
Explanation:
  1. Kerosene is obtained from petroleum between $ 200^0C  to  300^0C $.

The hydrocarbons present in diesel are from:

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. $C _{15}\ to\ C _{18}$

  2. $C _{25}\ to\ C _{38}$

  3. $C _{35}\ to\ C _{58}$

  4. $C _{55}\ to\ C _{68}$

Show answer
Correct Option: A
Explanation:

Hydrocarbons present in

Gasoline $\Rightarrow C _3-C _{12}$
Napthalene $\Rightarrow C _8-C _{12}$
Kerosene/Jet fuels $\Rightarrow C _{11}-C _{14}$
Diesel & fuel oils $\Rightarrow C _{15}-C _{18}$
The hydrocarbons present in diesel are $C _{15}-C _{18}$.

The petrol, octance number of which is $80$, has:

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. $20\%$ n - heptane + $80\%$ iso-octane

  2. $20\%$ n - heptane + $80\%$ n-octane

  3. $80\%$ n - heptane + $20\%$ iso-octane

  4. $80\%$ n - heptane + $20\%$ n-octane

Show answer
Correct Option: A
Explanation:

Petrol, which has octane number 80 contain 20% n-heptane and 80% iso-octane.

The process of separating the various constituents of petroleum is known as:

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. fractional distillation

  2. distillation

  3. separation

  4. multiple separation

Show answer
Correct Option: A
Explanation:

The process of separating the various constituents of petroleum is known as fractional distillation.

$90-$ Octane Petrol is a rating that indicates that the petrol in the engine would not waster its energy in making a 'knocking sound', but would rather use its energy efficiency to maintaining speed for travel $'90-Octane$ petrol' means that the petrol is as good as:

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. $90$% octane

  2. $90$% normal heptane and $10$% iso-octane

  3. A mixture of $90$% iso-octane and $10$% normal (straight chain) heptane

  4. $90$% petrol

Show answer
Correct Option: C
Explanation:

90-Octane petrol is the  mixture of 90% iso-octane and 10% normal (straight chain) heptane.

Hence option C is correct.

Synthetic petrol and kerosine can be made form coal by passing one of the following gases under heat and pressure over-coal.

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. Nitrogen

  2. Hydrogen

  3. Oxygen

  4. Carbon dioxide

Show answer
Correct Option: B
Explanation:

When coal is passed through hydrogen under heat and pressure it produces synthetic petrol and kerosene which is used for household fuel.

Octane number is a scale for counting?

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. the quantity of water present in alcohol.

  2. the percentage of liquefied petroleum gas in a given sample of petrol.

  3. the quality of petrol

  4. the number of different hydrocarbons present in a sample of petrol.

Show answer
Correct Option: C
Explanation:

Octane rating or octane number is a standard measure of the performance of a motor- or aviation fuel. The higher the octane number, the more compression the fuel can withstand. fuels with a higher octane rating are used in high performance petrol engines that require higher compression ratios. thus it reflects the quality of fuel.

Quality of a diesel is measured in terms of its?

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. Cetane number

  2. Octane number

  3. Gold number

  4. Avogadro number

Show answer
Correct Option: A
Explanation:

A cetane number is the measure of the quality of the diesel . Higher cetane number indicates that the fuel ignites more readily when sprayed over hot compressed air.

Which of the following is present in the heavy oil obtained during petroleum distillation ?

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. Gas oil

  2. Fuel oil

  3. Diesel oil

  4. All of these

Show answer
Correct Option: D
Explanation:

The following fuels are present in the heavy oil obtained during petroleum distillation 1. Gas oil  2.Fuel oil and Diesel oil.

So all the given options are correct.

Hence option D is correct.

Complete removal of ______ from gasoline is done by Unisol process using caustic soda and methyl alcohol. 

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. asphalt

  2. mercaptans

  3. diolefins

  4. waxes

Show answer
Correct Option: B
Explanation:

Unisol process is a regenerative method for not only extracting or removing mercaptans but also some of the nitrogen compounds. In this process first gasoline is washed counter-currently with aqueous caustic methanol solution. The spent caustic is regenerated in a stripping tower where the methanol, water and mercaptans are extracted.