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By which of the following fractions of petroleum aromatic hydrocarbons are produced?

By which of the following fractions of petroleum aromatic hydrocarbons are produced? Correct Answer Special closely boiling fractions

By catalytic reforming and separation of special closely boiling fractions of petroleum, aromatic hydrocarbons are obtained, while by thermal cracking with steam of wide ranging hydrocarbons, olefins are produced.

Related Questions

Mr.Rohan while helping the students of Class IV in adding and subtracting fractions observed that several students are not able to complete the addition of two improper fractions. He gave a small test with questions from the addition of proper fractions (one item of addition of two similar fractions, three items from the addition of proper and improper fractions, and four items from the addition of improper fractions). He analyzed the responses of each student and found that nearly 45% of students were not clear in adding proper with improper fractions which were affecting their performance in adding two improper fractions. He, therefore, focused on developing the understanding of improper fractions and their addition with proper fractions after which he proceeded to teach the addition of two improper fractions. Which kind of assessment is depicted by this situation?
Study the following statements.
1. Petroleum is a major source of aliphatic hydrocarbons.
2. Coal is a source of aromatic hydrocarbons.
3. Petroleum is commonly called liquid gold.
Which of the statements given above are correct?
Denominator of first and second fractions is 4 and 9 respectively. The sum of these two fractions is 43/36 and if the numerator of these fractions is reversed, the sum of the two fractions becomes 4/3. Then the first fraction is what percent of the second fraction.
Consider the following statements about hydrocarbons. i. Alkanes are saturated hydrocarbons that contain single bonds. ii. Alkynes are unsaturated hydrocarbons that contain one or more double bonds.  iii. Alkenes are Unsaturated hydrocarbons that contain one or more triple bonds.   
Statement I Petroleum is a mixture of many different hydrocarbons of different densities.
Statement II The grade of petroleum, depends mainly on the relative proportion of the different hydrocarbons.
Consider the following statements.
1. Carbon black is obtained when methane is heated in absence of air.
2. Kerosene is a mixture of alphatic hydrocarbons.
3. Most of hydrocarbons from petroleum are obtained by fractional distillation.
Which of the statements given above are correct?
Assertion (A) Hydrocarbons are very good fuels.
Reason (R) The main sources of hydrocarbons are natural gas, petroleum and coal.
Select the incorrect statement with respect to petroleum: A. It should be used more often as it is highly energy efficient. B. Crude petroleum is cleaned and separated at a refinery.  C. It is used for dry cleaning, for making plastic and paints etc. D. Petrol, diesel kerosene are the only forms of petroleum.
In which of the following methods can acetylene be produced from petroleum hydrocarbons?
Which fuel is slightly heavier than kerosene and is produced in petroleum fractions?