CSEC Alkanes

Multiple Choice

Which of the following are hydrocarbons?

i. C₃H₈

ii. C₆H₆

iii. C₂H₅OH

iv. CH₃F

• i, ii, ii and iv

• i and ii only

• i only

• ii only

Multiple Choice

Name the compound shown.

Alkanes C_nH_2n+2

Alkenes C_nH_2n

• 2-methylpentane

• 3-methylpentane

• 4-methylpentane

• methylpentene

Multiple Choice

Which equation represents the complete combustion of ethane.

• 2C₂​H₆​+7O₂​→ 4CO₂​+ 6H₂​O

• 2C₂​H₆​+3O₂​→ 4C ​+ 6H₂​O

• 2C₃H₆​+9O₂​→ 6CO₂​+ 6H₂​O

• No option is correct

Multiple Choice

Use the following equation to calculate the number of mol of oxygen required to completely react with 0.4 mol of methane (CH₄).

C​H₄​+2O₂​→ CO₂​+ 2H₂​O

• 0.1 mol

• 0.2 mol

• 0.3 mol

• 0.8 mol

Multiple Choice

Use the following equation to calculate the volume of carbon dioxide produced when of 0.001 methane (CH₄) burns completely (gas measured @ rtp; 1 mol of gas @ rtp occupies 24, 000 cm³).

C​H₄​+2O₂​→ CO₂​+ 2H₂​O

• 0.001 cm³

• 24 cm³

• 24 dm³l

• 48 cm³

Multiple Choice

Identify the substitution reaction.

• C₂H₄ + Cl₂ ---> C₂H₄Cl₂

• C₂H₄ + H₂O ---> C₂H₅OH

• C₂H₆ + F₂ ---> C₂H₅F+ HF

• No options are correct.

Multiple Choice

Which of the following will not be a product of the reaction of ethane with Fluorine.

• Hydrogen fluoride gas

• fluoroethane

• hydrogen

• 1,2-difluoroethane

Draw

Balance the equation for reaction of Chlorine with propane.

Multiple Choice

Use data given to predict observations made when a few drops of bromine are mixed with pentane, C₅H₁₂.

• Pentane turns orange

• Bromine goes from orange to colourless.

• Effervescence.

• Heat is released

Multiple Choice

Identify the correct observation for the following reaction.

Adding bromine water to butane in the dark.

• Bromine remains orange.

• Bromine immediately turns colourless.

• Bromine remains colourless.

• Bromine slowly turns colourless.

Draw

Complete and balance the equation to show formation of 2-bromobutane.

Multiple Choice

Alkane X melts at -91 ^oC and boils at 98 ^oC. What is its state at 25 ^oC?

• Solid

• Liquid

• Gas

• Solid/liquid