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Alkanes

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Question 7

Alkanes obtained from crude oil are modified by cracking to meet the demand for shorter-chain hydrocarbons. A chemical engineer evaluates four different industrial cracking designs for processing a fraction containing decane (C10H22C_{10}H_{22}C10​H22​).

Which row in the table correctly identifies the cracking type, catalyst, reaction conditions, and primary products?

RowCracking TypeCatalystOperating ConditionsMajor Product Slate
AThermalNone500 ∘C500\text{ }^\circ\text{C}500 ∘C, atmospheric pressureHigh yield of branched alkanes and aromatics
BCatalyticZeolite450 ∘C450\text{ }^\circ\text{C}450 ∘C, slight pressureHigh yield of branched alkanes, cycloalkanes, and aromatics
CThermalZeolite900 ∘C900\text{ }^\circ\text{C}900 ∘C, high pressureHigh yield of gaseous alkenes such as ethene
DCatalyticNone450 ∘C450\text{ }^\circ\text{C}450 ∘C, high pressureHigh yield of straight-chain alkanes and alkenes

Row A

Row B

Row C

Row D

Alkanes Questions

  1. A Level
  2. /Chemistry
  3. /Alkanes