But-1-ene is part of the alkene homologous series. Consecutive members of the same homologous series differ by a -CH$_2$- group and show similar chemical properties. State two other features of a homologous series.
Explain how Fig. 4.1 indicates that but-1-ene is an unsaturated compound.
Give the structural formula for but-1-ene.
Draw the displayed formula for an isomer of but-1-ene.
Undecane, $\text{C}_{11}\text{H}_{24}$, occurs in the kerosene/paraffin fraction obtained when petroleum is distilled. Give one use for the kerosene/paraffin fraction.
When undecane is cracked, smaller hydrocarbon molecules are produced. Construct the symbol equation for a reaction in which undecane is cracked and the only products are butane, propene and ethene.
Propane reacts with chlorine to make chloropropane and one additional product, X. $\text{C}_3\text{H}_8 + \text{Cl}_2 \rightarrow \text{C}_3\text{H}_7\text{Cl} + X$ Name product X.
State the essential condition for this reaction.
Ethene reacts with bromine at room temperature. Calculate the enthalpy change for this reaction in kJ/mol. Use the bond energies in Table 4.1.
Describe the colour change seen when excess ethene is added to a few drops of aqueous bromine. from …………………… to ……………………