Crude oil and Fuels

Useful fractions are obtained by the fractional distillation of crude oil. Which shows the correct match of fraction to its use?

• A

• B

• C

• D

Which statement is correct about fraction W and fraction X?

• Fraction W has higher boiling points than fraction X.

• Fraction X is more flammable than fraction W.

• Fraction W is less viscous than fraction X.

• Fraction X has lower relative molecular masses than fraction W.

Which statements are true? (Select all that apply)

• Naphtha has a higher boiling point than bitumen

• Temperature is higher at the top of the fractionating column during fractional distillation

• Aluminium oxide & Silicon dioxide is used as the catalyst for cracking

• There are more carbon atoms in molecules of lighter fractions

• 600 °C is the temperature used for cracking

Which is NOT possible to obtain from cracking of hydrocarbons? (Select all that apply)

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• 
• 
• 

1 mole of C₁₆H₃₄ undergoes cracking to produce 1 mole of C₄H₁₀ and X moles of C₂H₄. What is X?

• 1

• 4

• 6

• 12