Alkanes (CIE A Level Chemistry)

The cracking of a single hydrocarbon molecule, C_nH_2n+2, produces two hydrocarbon molecules only. Each hydrocarbon product contains the same number of carbon atoms in one molecule.  Each hydrocarbon product has non-cyclic structural isomers. 

What is the value of n?

Which hydrocarbon would not be collected in the inverted tube by heating pentane,

CH₃(CH₂)₃CH₃, in the apparatus shown?

0.200 mol of a hydrocarbon undergoes complete combustion to give 35.2 g of carbon dioxide and 14.4 g of water as the only products.

What is the molecular formula of the hydrocarbon?

Samples of 10 cm³ of each of the first four members of the alkane series are separately mixed with 70 cm³ of oxygen. Each is then burned and the total volume, V, of residual gas measured again at room temperature and pressure.

Which graph represents the results that would be obtained?

The petrol additive tetraethyl-lead (IV), Pb(C₂H₅)₄, is now banned in many countries. When it is completely burned in air, lead (II) oxide, CO₂ and H₂O are formed.

How many moles of oxygen are required to burn one mole of Pb(C₂H₅)₄?

The cracking of eicosane, C₂₀H₄₂, produces a hydrocarbon that is in very high demand for transportation and also three consecutive members of the same homologous series of hydrocarbons.

What are the correct products of cracking for the given reaction?