Crude Oil Composition Quiz

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Questions and Answers

Which class of hydrocarbons is the principal constituent of natural gas?

  • Alkanes (correct)
  • Cycloparaffins
  • Alkynes
  • Alkenes

What is the general formula for alkanes?

  • $C_nH_{2n}$
  • $C_nH_{2n+2}$ (correct)
  • $C_nH_{n+2}$
  • $C_{2n}H_{n}$

Which hydrocarbon class is characterized by saturated cyclic hydrocarbons?

  • Alkanes
  • Alkynes
  • Alkenes
  • Cycloparaffins (correct)

What is the major difference between normal alkanes and branched alkanes?

<p>Presence of side branches (C)</p> Signup and view all the answers

Which hydrocarbon class is NOT present in the crude oil mixture?

<p>Alkenes (C)</p> Signup and view all the answers

What is the name given to a branched alkane that has the same number of carbon and hydrogen atoms as a normal alkane?

<p>$iso$-butane (A)</p> Signup and view all the answers

Which type of compounds are important precursors for aromatic hydrocarbons?

<p>Cyclohexanes (A)</p> Signup and view all the answers

What is the simplest mononuclear aromatic compound found in crude oil?

<p>Benzene (D)</p> Signup and view all the answers

Why is separating BTX aromatics from crude oil distillates not feasible?

<p>Low concentration of BTX compounds (A)</p> Signup and view all the answers

Which type of impurities found in crude oil can be harmful to certain catalytic processes?

<p>Metallic compounds (D)</p> Signup and view all the answers

What type of compounds in fuels can cause pollution problems?

<p>Sulphur and nitrogen levels (C)</p> Signup and view all the answers

In which fractions are lower members of naphthenes like cyclopentane and cyclohexane normally present?

<p>Heavy naphtha fractions (A)</p> Signup and view all the answers

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