Tag: fossil fuels

Questions Related to fossil fuels

Which of the following is not an important refinery process for upgrading the quality of lubrication oil?

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. solvent refining

  2. deoiling

  3. clay treatment

  4. hydrotreatment

Show answer
Correct Option: B
Explanation:

In the refinery for lubricating oil, solvent refining, clay treatment and hydrotreatment are the important processes. The solvent used for refining purpose has to be pure. Clay treatment is done to remove colour, odour and sulphur from the oil. 

Flash point of atmospheric distillation residue is determined by ______apparates.

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. cleveland(open cup type)

  2. abel

  3. pensky-martens

  4. none of these

Show answer
Correct Option: A
Explanation:

Cleveland is an open cup apparatus is also known as open cup tester. In this, the cup is first filled with the product to a certain level. Then the temperature is raised rapidly and then at a slow constant rate as it approaches the theoretical flashpoint. The lowest temperature at which a small test flame passing over the liquid ignites the vapour is considered chemical's flashpoint.


It is used for determining flashpoint of atmospheric distillation.

Hence, the correct option is $\text{A}$

When earth's crust is drilled, hydrocarbon came out first is:

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. petroleum

  2. methane

  3. ethane

  4. butane

Show answer
Correct Option: B
Explanation:

Hydrocarbon is a compound containing carbon atoms and hydrogen atoms. Methane is the hydrocarbon found in the earth's crust. It is the simplest hydrocarbon. It is mainly used as fuel.

Major source of propylene in a refinery is:

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. visbreaking

  2. iso cracking process

  3. fluidised bed catalytic cracking

  4. catalytic reforming

Show answer
Correct Option: C
Explanation:

Propylene is often referred to as the crown prince of petrochemicals. Propylene is a byproduct of steam crackers and the varying amount of olefins is produced from steam crackers depending on the type of feedstock. Other sources of propylene may be the recovery of propylene from FCC light ends, Propane dehydrogenation and fluidized bed catalytic cracking.

As per the EuroIII norms for gasoline the benzene content should be:

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. 1%

  2. 2%

  3. 3%

  4. 4%

Show answer
Correct Option: A
Explanation:

Bharat stage emission standard is an emission standard institute which is governed by the government of India to regulate the air pollutants from internal combustion engines or vehicle motors.Bharat Stage III norms or Euro III norms were enforced in October 2010 all over the country. According to this benzene content in gasoline should be 1%.

Which of the following is true from given statements?

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. use of steam reduces the selectivity towards higher olefin production

  2. increase tube diameter increases the yield of propylene

  3. use of steam increases the selectivity towards higher olefin production

  4. increase tube diameter increases the yield of ethyne

Show answer
Correct Option: C
Explanation:
Use of steam increases the selectively towards higher olefin production.
The two most common petrochemical classes are olefins (including ethylene and propylene) and aromatics (including benzene, toluene and xylene isomers). Oil refineries produce olefins and aromatics by fluid catalytic cracking of petroleum fractions. Chemical plants produce olefins by steam cracking of natural gas liquids like ethane and propane. Aromatics are produced by catalytic reforming of naphtha. Olefins and aromatics are the building blocks for a wide range of materials such as solvents, detergents, and adhesives. Olefins are the basis for polymers and oligomers used in plastics, resins, fibres, elastomers, lubricants, and gels.

Which of the following statements is true if fuel has high aniline point?

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. Fuel has low paraffin

  2. Fuel has high diesel index

  3. Fuel has high aromatics

  4. Fuel has low diesel index

Show answer
Correct Option: B
Explanation:

Aniline point is the lowest temperature at which equal volumes of fresh aniline and an oil are completely miscible. Higher the aniline point, higher is the diesel index. Diesel index indicates the ignition quality of the fuel. 

Steam consumption in steam cracker plant is high in case of:

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. gas oil

  2. propane

  3. napthalene

  4. ethane

Show answer
Correct Option: D
Explanation:

In petroleum chemistry, Steam cracker plant is a process by which complex organic molecules are broken down to the simpler molecules using steam. Here, the cracking is done by using steam. Ethane cracking consumes the maximum amount of steam.

In a case of catalytic reforming dehydration of naphthenes to aromatics is:

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. favoured by a decrease in temperature and decrease in pressure

  2. favoured by an increase in temperature and increase in pressure

  3. favoured by an increase in temperature and decrease in pressure

  4. none of these

Show answer
Correct Option: C
Explanation:

In catalytic reforming process, high octane number reformate is formed which is the main component of the motor, fuel, aviation gasoline or aromatic rich feedstock. Favourable Conditions for the reaction are High temperature, Low pressure and low space velocity.

The RON/MON values of $n$-heptane is:

chemistry energy rocks and minerals petroleum and natural gas fossil fuels

  1. $0$

  2. $100$

  3. $1000$

  4. $50$

Show answer
Correct Option: A
Explanation:

Octane number can be determined by RON, MON and AKI. The most common method used for the measurement is RON. RON is determined by running the fuel in a test engine and comparing the results with those for mixtures of iso- octane and $n$- heptane. The RON/MON value for $n$- heptane is 0.