Crude oil and alkanes quiz

Name this compound

• methane

• ethane

• ethene

• hydrocarbon

Which homologous series ?

• hydrocarbons

• organic molecules

• alkanes

• crude oil

What is the general formula of alkanes ?

• CH₂

• C_nH_2n

• C_nH_2n+2

• C_nH_n

What is the molecular formula of hexane ?

• C₃H₇

• CH

• C₆H₁₄

• CH₂

Which is the best description of crude oil ?

• a mixture of petrol and bitumen

• a mixture of alkanes and alkenes

• a mixture of hydrocarbons

• a mixture of gases, liquids and solids

how is crude oil separated ?

• simple distillation

• fractional distillation

• filtration

• chromatography

which of these statements about alkanes is true ?

• as the carbon chain length increases, the compound becomes less viscous

• as the carbon chain length increases, the boiling point decreases

• short chain length are gases and longer chain lengths are liquids

• the longer the carbon chain length, the lighter the colour

for which molecule is the empirical formula the same as the molecular formula ?

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C₂H₆ + Cl₂ --> C₂H₅Cl + HCl

Which type of reaction is this ?

• addition

• substitution

• polymerisation

• thermal decomposition

The reaction between chlorine and ethane is shown

C₂H₆ + Cl₂ --> C₂H₅Cl + HCl

What is the essential condition for this reaction?

• Room temperature

• high pressure

• infra red light

• ultra violet light